Merge remote-tracking branch 'upstream/master'

This commit is contained in:
Roger Yates 2019-12-08 22:05:44 +10:00
commit bc628d1643
3012 changed files with 25161 additions and 160993 deletions

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@ -1,47 +1,46 @@
<?xml version="1.0"?>
<project
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<?xml version="1.0" encoding="UTF-8"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion>
<artifactId>akka-http</artifactId>
<name>akka-http</name>
<modelVersion>4.0.0</modelVersion>
<artifactId>akka-http</artifactId>
<name>akka-http</name>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<parent>
<artifactId>parent-modules</artifactId>
<groupId>com.baeldung</groupId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>com.typesafe.akka</groupId>
<artifactId>akka-http_2.12</artifactId>
<version>${akka.http.version}</version>
</dependency>
<dependency>
<groupId>com.typesafe.akka</groupId>
<artifactId>akka-stream_2.12</artifactId>
<version>${akka.stream.version}</version>
</dependency>
<dependency>
<groupId>com.typesafe.akka</groupId>
<artifactId>akka-http-jackson_2.12</artifactId>
<version>${akka.http.version}</version>
</dependency>
<dependency>
<groupId>com.typesafe.akka</groupId>
<artifactId>akka-http-testkit_2.12</artifactId>
<version>${akka.http.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<dependencies>
<dependency>
<groupId>com.typesafe.akka</groupId>
<artifactId>akka-http_2.12</artifactId>
<version>${akka.http.version}</version>
</dependency>
<dependency>
<groupId>com.typesafe.akka</groupId>
<artifactId>akka-stream_2.12</artifactId>
<version>${akka.stream.version}</version>
</dependency>
<dependency>
<groupId>com.typesafe.akka</groupId>
<artifactId>akka-http-jackson_2.12</artifactId>
<version>${akka.http.version}</version>
</dependency>
<dependency>
<groupId>com.typesafe.akka</groupId>
<artifactId>akka-http-testkit_2.12</artifactId>
<version>${akka.http.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<akka.http.version>10.0.11</akka.http.version>
<akka.stream.version>2.5.11</akka.stream.version>
</properties>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<akka.http.version>10.0.11</akka.http.version>
<akka.stream.version>2.5.11</akka.stream.version>
</properties>
</project>

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@ -1,13 +1,13 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>akka-streams</artifactId>
<name>akka-streams</name>
<parent>
<artifactId>parent-modules</artifactId>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>

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@ -1,5 +1,6 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>algorithms-genetic</artifactId>
<version>0.0.1-SNAPSHOT</version>
@ -60,5 +61,4 @@
<commons-codec.version>1.11</commons-codec.version>
</properties>
</project>

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@ -7,8 +7,6 @@ This module contains articles about algorithms. Some classes of algorithms, e.g.
- [Validating Input With Finite Automata in Java](https://www.baeldung.com/java-finite-automata)
- [Example of Hill Climbing Algorithm](https://www.baeldung.com/java-hill-climbing-algorithm)
- [Monte Carlo Tree Search for Tic-Tac-Toe Game](https://www.baeldung.com/java-monte-carlo-tree-search)
- [Binary Search Algorithm in Java](https://www.baeldung.com/java-binary-search)
- [Introduction to Minimax Algorithm](https://www.baeldung.com/java-minimax-algorithm)
- [How to Calculate Levenshtein Distance in Java?](https://www.baeldung.com/java-levenshtein-distance)
- [How to Find the Kth Largest Element in Java](https://www.baeldung.com/java-kth-largest-element)

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@ -1,5 +1,6 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>algorithms-miscellaneous-1</artifactId>
<version>0.0.1-SNAPSHOT</version>
@ -43,7 +44,7 @@
<groupId>com.github.dpaukov</groupId>
<artifactId>combinatoricslib3</artifactId>
<version>${combinatoricslib3.version}</version>
</dependency>
</dependency>
</dependencies>
<build>

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@ -1,5 +1,6 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>algorithms-miscellaneous-2</artifactId>
<version>0.0.1-SNAPSHOT</version>
@ -34,9 +35,9 @@
<version>${org.jgrapht.core.version}</version>
</dependency>
<dependency>
<groupId>org.jgrapht</groupId>
<artifactId>jgrapht-ext</artifactId>
<version>${org.jgrapht.ext.version}</version>
<groupId>org.jgrapht</groupId>
<artifactId>jgrapht-ext</artifactId>
<version>${org.jgrapht.ext.version}</version>
</dependency>
<dependency>
<groupId>pl.allegro.finance</groupId>

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@ -0,0 +1,30 @@
package com.baeldung.algorithms.astar;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;
public class Graph<T extends GraphNode> {
private final Set<T> nodes;
private final Map<String, Set<String>> connections;
public Graph(Set<T> nodes, Map<String, Set<String>> connections) {
this.nodes = nodes;
this.connections = connections;
}
public T getNode(String id) {
return nodes.stream()
.filter(node -> node.getId().equals(id))
.findFirst()
.orElseThrow(() -> new IllegalArgumentException("No node found with ID"));
}
public Set<T> getConnections(T node) {
return connections.get(node.getId()).stream()
.map(this::getNode)
.collect(Collectors.toSet());
}
}

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@ -0,0 +1,5 @@
package com.baeldung.algorithms.astar;
public interface GraphNode {
String getId();
}

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@ -0,0 +1,66 @@
package com.baeldung.algorithms.astar;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.PriorityQueue;
import java.util.Queue;
import java.util.stream.Collectors;
public class RouteFinder<T extends GraphNode> {
private final Graph<T> graph;
private final Scorer<T> nextNodeScorer;
private final Scorer<T> targetScorer;
public RouteFinder(Graph<T> graph, Scorer<T> nextNodeScorer, Scorer<T> targetScorer) {
this.graph = graph;
this.nextNodeScorer = nextNodeScorer;
this.targetScorer = targetScorer;
}
public List<T> findRoute(T from, T to) {
Map<T, RouteNode<T>> allNodes = new HashMap<>();
Queue<RouteNode> openSet = new PriorityQueue<>();
RouteNode<T> start = new RouteNode<>(from, null, 0d, targetScorer.computeCost(from, to));
allNodes.put(from, start);
openSet.add(start);
while (!openSet.isEmpty()) {
System.out.println("Open Set contains: " + openSet.stream().map(RouteNode::getCurrent).collect(Collectors.toSet()));
RouteNode<T> next = openSet.poll();
System.out.println("Looking at node: " + next);
if (next.getCurrent().equals(to)) {
System.out.println("Found our destination!");
List<T> route = new ArrayList<>();
RouteNode<T> current = next;
do {
route.add(0, current.getCurrent());
current = allNodes.get(current.getPrevious());
} while (current != null);
System.out.println("Route: " + route);
return route;
}
graph.getConnections(next.getCurrent()).forEach(connection -> {
double newScore = next.getRouteScore() + nextNodeScorer.computeCost(next.getCurrent(), connection);
RouteNode<T> nextNode = allNodes.getOrDefault(connection, new RouteNode<>(connection));
allNodes.put(connection, nextNode);
if (nextNode.getRouteScore() > newScore) {
nextNode.setPrevious(next.getCurrent());
nextNode.setRouteScore(newScore);
nextNode.setEstimatedScore(newScore + targetScorer.computeCost(connection, to));
openSet.add(nextNode);
System.out.println("Found a better route to node: " + nextNode);
}
});
}
throw new IllegalStateException("No route found");
}
}

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@ -0,0 +1,67 @@
package com.baeldung.algorithms.astar;
import java.util.StringJoiner;
class RouteNode<T extends GraphNode> implements Comparable<RouteNode> {
private final T current;
private T previous;
private double routeScore;
private double estimatedScore;
RouteNode(T current) {
this(current, null, Double.POSITIVE_INFINITY, Double.POSITIVE_INFINITY);
}
RouteNode(T current, T previous, double routeScore, double estimatedScore) {
this.current = current;
this.previous = previous;
this.routeScore = routeScore;
this.estimatedScore = estimatedScore;
}
T getCurrent() {
return current;
}
T getPrevious() {
return previous;
}
double getRouteScore() {
return routeScore;
}
double getEstimatedScore() {
return estimatedScore;
}
void setPrevious(T previous) {
this.previous = previous;
}
void setRouteScore(double routeScore) {
this.routeScore = routeScore;
}
void setEstimatedScore(double estimatedScore) {
this.estimatedScore = estimatedScore;
}
@Override
public int compareTo(RouteNode other) {
if (this.estimatedScore > other.estimatedScore) {
return 1;
} else if (this.estimatedScore < other.estimatedScore) {
return -1;
} else {
return 0;
}
}
@Override
public String toString() {
return new StringJoiner(", ", RouteNode.class.getSimpleName() + "[", "]").add("current=" + current)
.add("previous=" + previous).add("routeScore=" + routeScore).add("estimatedScore=" + estimatedScore)
.toString();
}
}

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@ -0,0 +1,5 @@
package com.baeldung.algorithms.astar;
public interface Scorer<T extends GraphNode> {
double computeCost(T from, T to);
}

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@ -0,0 +1,19 @@
package com.baeldung.algorithms.astar.underground;
import com.baeldung.algorithms.astar.Scorer;
public class HaversineScorer implements Scorer<Station> {
@Override
public double computeCost(Station from, Station to) {
double R = 6372.8; // In kilometers
double dLat = Math.toRadians(to.getLatitude() - from.getLatitude());
double dLon = Math.toRadians(to.getLongitude() - from.getLongitude());
double lat1 = Math.toRadians(from.getLatitude());
double lat2 = Math.toRadians(to.getLatitude());
double a = Math.pow(Math.sin(dLat / 2),2) + Math.pow(Math.sin(dLon / 2),2) * Math.cos(lat1) * Math.cos(lat2);
double c = 2 * Math.asin(Math.sqrt(a));
return R * c;
}
}

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@ -0,0 +1,643 @@
package com.baeldung.algorithms.astar.underground;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import com.baeldung.algorithms.astar.Graph;
import com.baeldung.algorithms.astar.RouteFinder;
import org.junit.Before;
import org.junit.Test;
public class RouteFinderIntegrationTest {
private Graph<Station> underground;
private RouteFinder<Station> routeFinder;
@Before
public void setUp() throws Exception {
Set<Station> stations = new HashSet<>();
Map<String, Set<String>> connections = new HashMap<>();
stations.add(new Station("1", "Acton Town", 51.5028, -0.2801));
stations.add(new Station("2", "Aldgate", 51.5143, -0.0755));
stations.add(new Station("3", "Aldgate East", 51.5154, -0.0726));
stations.add(new Station("4", "All Saints", 51.5107, -0.013));
stations.add(new Station("5", "Alperton", 51.5407, -0.2997));
stations.add(new Station("6", "Amersham", 51.6736, -0.607));
stations.add(new Station("7", "Angel", 51.5322, -0.1058));
stations.add(new Station("8", "Archway", 51.5653, -0.1353));
stations.add(new Station("9", "Arnos Grove", 51.6164, -0.1331));
stations.add(new Station("10", "Arsenal", 51.5586, -0.1059));
stations.add(new Station("11", "Baker Street", 51.5226, -0.1571));
stations.add(new Station("12", "Balham", 51.4431, -0.1525));
stations.add(new Station("13", "Bank", 51.5133, -0.0886));
stations.add(new Station("14", "Barbican", 51.5204, -0.0979));
stations.add(new Station("15", "Barking", 51.5396, 0.081));
stations.add(new Station("16", "Barkingside", 51.5856, 0.0887));
stations.add(new Station("17", "Barons Court", 51.4905, -0.2139));
stations.add(new Station("18", "Bayswater", 51.5121, -0.1879));
stations.add(new Station("19", "Beckton", 51.5148, 0.0613));
stations.add(new Station("20", "Beckton Park", 51.5087, 0.055));
stations.add(new Station("21", "Becontree", 51.5403, 0.127));
stations.add(new Station("22", "Belsize Park", 51.5504, -0.1642));
stations.add(new Station("23", "Bermondsey", 51.4979, -0.0637));
stations.add(new Station("24", "Bethnal Green", 51.527, -0.0549));
stations.add(new Station("25", "Blackfriars", 51.512, -0.1031));
stations.add(new Station("26", "Blackhorse Road", 51.5867, -0.0417));
stations.add(new Station("27", "Blackwall", 51.5079, -0.0066));
stations.add(new Station("28", "Bond Street", 51.5142, -0.1494));
stations.add(new Station("29", "Borough", 51.5011, -0.0943));
stations.add(new Station("30", "Boston Manor", 51.4956, -0.325));
stations.add(new Station("31", "Bounds Green", 51.6071, -0.1243));
stations.add(new Station("32", "Bow Church", 51.5273, -0.0208));
stations.add(new Station("33", "Bow Road", 51.5269, -0.0247));
stations.add(new Station("34", "Brent Cross", 51.5766, -0.2136));
stations.add(new Station("35", "Brixton", 51.4627, -0.1145));
stations.add(new Station("36", "Bromley-By-Bow", 51.5248, -0.0119));
stations.add(new Station("37", "Buckhurst Hill", 51.6266, 0.0471));
stations.add(new Station("38", "Burnt Oak", 51.6028, -0.2641));
stations.add(new Station("39", "Caledonian Road", 51.5481, -0.1188));
stations.add(new Station("40", "Camden Town", 51.5392, -0.1426));
stations.add(new Station("41", "Canada Water", 51.4982, -0.0502));
stations.add(new Station("42", "Canary Wharf", 51.5051, -0.0209));
stations.add(new Station("43", "Canning Town", 51.5147, 0.0082));
stations.add(new Station("44", "Cannon Street", 51.5113, -0.0904));
stations.add(new Station("45", "Canons Park", 51.6078, -0.2947));
stations.add(new Station("46", "Chalfont & Latimer", 51.6679, -0.561));
stations.add(new Station("47", "Chalk Farm", 51.5441, -0.1538));
stations.add(new Station("48", "Chancery Lane", 51.5185, -0.1111));
stations.add(new Station("49", "Charing Cross", 51.508, -0.1247));
stations.add(new Station("50", "Chesham", 51.7052, -0.611));
stations.add(new Station("51", "Chigwell", 51.6177, 0.0755));
stations.add(new Station("52", "Chiswick Park", 51.4946, -0.2678));
stations.add(new Station("53", "Chorleywood", 51.6543, -0.5183));
stations.add(new Station("54", "Clapham Common", 51.4618, -0.1384));
stations.add(new Station("55", "Clapham North", 51.4649, -0.1299));
stations.add(new Station("56", "Clapham South", 51.4527, -0.148));
stations.add(new Station("57", "Cockfosters", 51.6517, -0.1496));
stations.add(new Station("58", "Colindale", 51.5955, -0.2502));
stations.add(new Station("59", "Colliers Wood", 51.418, -0.1778));
stations.add(new Station("60", "Covent Garden", 51.5129, -0.1243));
stations.add(new Station("61", "Crossharbour & London Arena", 51.4957, -0.0144));
stations.add(new Station("62", "Croxley", 51.647, -0.4412));
stations.add(new Station("63", "Custom House", 51.5095, 0.0276));
stations.add(new Station("64", "Cutty Sark", 51.4827, -0.0096));
stations.add(new Station("65", "Cyprus", 51.5085, 0.064));
stations.add(new Station("66", "Dagenham East", 51.5443, 0.1655));
stations.add(new Station("67", "Dagenham Heathway", 51.5417, 0.1469));
stations.add(new Station("68", "Debden", 51.6455, 0.0838));
stations.add(new Station("69", "Deptford Bridge", 51.474, -0.0216));
stations.add(new Station("70", "Devons Road", 51.5223, -0.0173));
stations.add(new Station("71", "Dollis Hill", 51.552, -0.2387));
stations.add(new Station("72", "Ealing Broadway", 51.5152, -0.3017));
stations.add(new Station("73", "Ealing Common", 51.5101, -0.2882));
stations.add(new Station("74", "Earl's Court", 51.492, -0.1973));
stations.add(new Station("75", "Eastcote", 51.5765, -0.397));
stations.add(new Station("76", "East Acton", 51.5168, -0.2474));
stations.add(new Station("77", "East Finchley", 51.5874, -0.165));
stations.add(new Station("78", "East Ham", 51.5394, 0.0518));
stations.add(new Station("79", "East India", 51.5093, -0.0021));
stations.add(new Station("80", "East Putney", 51.4586, -0.2112));
stations.add(new Station("81", "Edgware", 51.6137, -0.275));
stations.add(new Station("82", "Edgware Road (B)", 51.5199, -0.1679));
stations.add(new Station("83", "Edgware Road (C)", 51.5203, -0.17));
stations.add(new Station("84", "Elephant & Castle", 51.4943, -0.1001));
stations.add(new Station("85", "Elm Park", 51.5496, 0.1977));
stations.add(new Station("86", "Elverson Road", 51.4693, -0.0174));
stations.add(new Station("87", "Embankment", 51.5074, -0.1223));
stations.add(new Station("88", "Epping", 51.6937, 0.1139));
stations.add(new Station("89", "Euston", 51.5282, -0.1337));
stations.add(new Station("90", "Euston Square", 51.526, -0.1359));
stations.add(new Station("91", "Fairlop", 51.596, 0.0912));
stations.add(new Station("92", "Farringdon", 51.5203, -0.1053));
stations.add(new Station("93", "Finchley Central", 51.6012, -0.1932));
stations.add(new Station("94", "Finchley Road", 51.5472, -0.1803));
stations.add(new Station("95", "Finsbury Park", 51.5642, -0.1065));
stations.add(new Station("96", "Fulham Broadway", 51.4804, -0.195));
stations.add(new Station("97", "Gallions Reach", 51.5096, 0.0716));
stations.add(new Station("98", "Gants Hill", 51.5765, 0.0663));
stations.add(new Station("99", "Gloucester Road", 51.4945, -0.1829));
stations.add(new Station("100", "Golders Green", 51.5724, -0.1941));
stations.add(new Station("101", "Goldhawk Road", 51.5018, -0.2267));
stations.add(new Station("102", "Goodge Street", 51.5205, -0.1347));
stations.add(new Station("103", "Grange Hill", 51.6132, 0.0923));
stations.add(new Station("104", "Great Portland Street", 51.5238, -0.1439));
stations.add(new Station("105", "Greenford", 51.5423, -0.3456));
stations.add(new Station("106", "Greenwich", 51.4781, -0.0149));
stations.add(new Station("107", "Green Park", 51.5067, -0.1428));
stations.add(new Station("108", "Gunnersbury", 51.4915, -0.2754));
stations.add(new Station("109", "Hainault", 51.603, 0.0933));
stations.add(new Station("110", "Hammersmith", 51.4936, -0.2251));
stations.add(new Station("111", "Hampstead", 51.5568, -0.178));
stations.add(new Station("112", "Hanger Lane", 51.5302, -0.2933));
stations.add(new Station("113", "Harlesden", 51.5362, -0.2575));
stations.add(new Station("114", "Harrow & Wealdston", 51.5925, -0.3351));
stations.add(new Station("115", "Harrow-on-the-Hill", 51.5793, -0.3366));
stations.add(new Station("116", "Hatton Cross", 51.4669, -0.4227));
stations.add(new Station("117", "Heathrow Terminals 1, 2 & 3", 51.4713, -0.4524));
stations.add(new Station("118", "Heathrow Terminal 4", 51.4598, -0.4476));
stations.add(new Station("119", "Hendon Central", 51.5829, -0.2259));
stations.add(new Station("120", "Heron Quays", 51.5033, -0.0215));
stations.add(new Station("121", "High Barnet", 51.6503, -0.1943));
stations.add(new Station("122", "High Street Kensington", 51.5009, -0.1925));
stations.add(new Station("123", "Highbury & Islington", 51.546, -0.104));
stations.add(new Station("124", "Highgate", 51.5777, -0.1458));
stations.add(new Station("125", "Hillingdon", 51.5538, -0.4499));
stations.add(new Station("126", "Holborn", 51.5174, -0.12));
stations.add(new Station("127", "Holland Park", 51.5075, -0.206));
stations.add(new Station("128", "Holloway Road", 51.5526, -0.1132));
stations.add(new Station("129", "Hornchurch", 51.5539, 0.2184));
stations.add(new Station("130", "Hounslow Central", 51.4713, -0.3665));
stations.add(new Station("131", "Hounslow East", 51.4733, -0.3564));
stations.add(new Station("132", "Hounslow West", 51.4734, -0.3855));
stations.add(new Station("133", "Hyde Park Corner", 51.5027, -0.1527));
stations.add(new Station("134", "Ickenham", 51.5619, -0.4421));
stations.add(new Station("135", "Island Gardens", 51.4871, -0.0101));
stations.add(new Station("136", "Kennington", 51.4884, -0.1053));
stations.add(new Station("137", "Kensal Green", 51.5304, -0.225));
stations.add(new Station("138", "Kensington (Olympia)", 51.4983, -0.2106));
stations.add(new Station("139", "Kentish Town", 51.5507, -0.1402));
stations.add(new Station("140", "Kenton", 51.5816, -0.3162));
stations.add(new Station("141", "Kew Gardens", 51.477, -0.285));
stations.add(new Station("142", "Kilburn", 51.5471, -0.2047));
stations.add(new Station("143", "Kilburn Park", 51.5351, -0.1939));
stations.add(new Station("144", "Kingsbury", 51.5846, -0.2786));
stations.add(new Station("145", "King's Cross St. Pancras", 51.5308, -0.1238));
stations.add(new Station("146", "Knightsbridge", 51.5015, -0.1607));
stations.add(new Station("147", "Ladbroke Grove", 51.5172, -0.2107));
stations.add(new Station("148", "Lambeth North", 51.4991, -0.1115));
stations.add(new Station("149", "Lancaster Gate", 51.5119, -0.1756));
stations.add(new Station("150", "Latimer Road", 51.5139, -0.2172));
stations.add(new Station("151", "Leicester Square", 51.5113, -0.1281));
stations.add(new Station("152", "Lewisham", 51.4657, -0.0142));
stations.add(new Station("153", "Leyton", 51.5566, -0.0053));
stations.add(new Station("154", "Leytonstone", 51.5683, 0.0083));
stations.add(new Station("155", "Limehouse", 51.5123, -0.0396));
stations.add(new Station("156", "Liverpool Street", 51.5178, -0.0823));
stations.add(new Station("157", "London Bridge", 51.5052, -0.0864));
stations.add(new Station("158", "Loughton", 51.6412, 0.0558));
stations.add(new Station("159", "Maida Vale", 51.53, -0.1854));
stations.add(new Station("160", "Manor House", 51.5712, -0.0958));
stations.add(new Station("161", "Mansion House", 51.5122, -0.094));
stations.add(new Station("162", "Marble Arch", 51.5136, -0.1586));
stations.add(new Station("163", "Marylebone", 51.5225, -0.1631));
stations.add(new Station("164", "Mile End", 51.5249, -0.0332));
stations.add(new Station("165", "Mill Hill East", 51.6082, -0.2103));
stations.add(new Station("166", "Monument", 51.5108, -0.0863));
stations.add(new Station("167", "Moorgate", 51.5186, -0.0886));
stations.add(new Station("168", "Moor Park", 51.6294, -0.432));
stations.add(new Station("169", "Morden", 51.4022, -0.1948));
stations.add(new Station("170", "Mornington Crescent", 51.5342, -0.1387));
stations.add(new Station("171", "Mudchute", 51.4902, -0.0145));
stations.add(new Station("172", "Neasden", 51.5542, -0.2503));
stations.add(new Station("173", "Newbury Park", 51.5756, 0.0899));
stations.add(new Station("174", "New Cross", 51.4767, -0.0327));
stations.add(new Station("175", "New Cross Gate", 51.4757, -0.0402));
stations.add(new Station("176", "Northfields", 51.4995, -0.3142));
stations.add(new Station("177", "Northolt", 51.5483, -0.3687));
stations.add(new Station("178", "Northwick Park", 51.5784, -0.3184));
stations.add(new Station("179", "Northwood", 51.6111, -0.424));
stations.add(new Station("180", "Northwood Hills", 51.6004, -0.4092));
stations.add(new Station("181", "North Acton", 51.5237, -0.2597));
stations.add(new Station("182", "North Ealing", 51.5175, -0.2887));
stations.add(new Station("183", "North Greenwich", 51.5005, 0.0039));
stations.add(new Station("184", "North Harrow", 51.5846, -0.3626));
stations.add(new Station("185", "North Wembley", 51.5621, -0.3034));
stations.add(new Station("186", "Notting Hill Gate", 51.5094, -0.1967));
stations.add(new Station("187", "Oakwood", 51.6476, -0.1318));
stations.add(new Station("188", "Old Street", 51.5263, -0.0873));
stations.add(new Station("189", "Osterley", 51.4813, -0.3522));
stations.add(new Station("190", "Oval", 51.4819, -0.113));
stations.add(new Station("191", "Oxford Circus", 51.515, -0.1415));
stations.add(new Station("192", "Paddington", 51.5154, -0.1755));
stations.add(new Station("193", "Park Royal", 51.527, -0.2841));
stations.add(new Station("194", "Parsons Green", 51.4753, -0.2011));
stations.add(new Station("195", "Perivale", 51.5366, -0.3232));
stations.add(new Station("196", "Picadilly Circus", 51.5098, -0.1342));
stations.add(new Station("197", "Pimlico", 51.4893, -0.1334));
stations.add(new Station("198", "Pinner", 51.5926, -0.3805));
stations.add(new Station("199", "Plaistow", 51.5313, 0.0172));
stations.add(new Station("200", "Poplar", 51.5077, -0.0173));
stations.add(new Station("201", "Preston Road", 51.572, -0.2954));
stations.add(new Station("202", "Prince Regent", 51.5093, 0.0336));
stations.add(new Station("203", "Pudding Mill Lane", 51.5343, -0.0139));
stations.add(new Station("204", "Putney Bridge", 51.4682, -0.2089));
stations.add(new Station("205", "Queen's Park", 51.5341, -0.2047));
stations.add(new Station("206", "Queensbury", 51.5942, -0.2861));
stations.add(new Station("207", "Queensway", 51.5107, -0.1877));
stations.add(new Station("208", "Ravenscourt Park", 51.4942, -0.2359));
stations.add(new Station("209", "Rayners Lane", 51.5753, -0.3714));
stations.add(new Station("210", "Redbridge", 51.5763, 0.0454));
stations.add(new Station("211", "Regent's Park", 51.5234, -0.1466));
stations.add(new Station("212", "Richmond", 51.4633, -0.3013));
stations.add(new Station("213", "Rickmansworth", 51.6404, -0.4733));
stations.add(new Station("214", "Roding Valley", 51.6171, 0.0439));
stations.add(new Station("215", "Rotherhithe", 51.501, -0.0525));
stations.add(new Station("216", "Royal Albert", 51.5084, 0.0465));
stations.add(new Station("217", "Royal Oak", 51.519, -0.188));
stations.add(new Station("218", "Royal Victoria", 51.5091, 0.0181));
stations.add(new Station("219", "Ruislip", 51.5715, -0.4213));
stations.add(new Station("220", "Ruislip Gardens", 51.5606, -0.4103));
stations.add(new Station("221", "Ruislip Manor", 51.5732, -0.4125));
stations.add(new Station("222", "Russell Square", 51.523, -0.1244));
stations.add(new Station("223", "Seven Sisters", 51.5822, -0.0749));
stations.add(new Station("224", "Shadwell", 51.5117, -0.056));
stations.add(new Station("225", "Shepherd's Bush (C)", 51.5046, -0.2187));
stations.add(new Station("226", "Shepherd's Bush (H)", 51.5058, -0.2265));
stations.add(new Station("227", "Shoreditch", 51.5227, -0.0708));
stations.add(new Station("228", "Sloane Square", 51.4924, -0.1565));
stations.add(new Station("229", "Snaresbrook", 51.5808, 0.0216));
stations.add(new Station("230", "Southfields", 51.4454, -0.2066));
stations.add(new Station("231", "Southgate", 51.6322, -0.128));
stations.add(new Station("232", "Southwark", 51.501, -0.1052));
stations.add(new Station("233", "South Ealing", 51.5011, -0.3072));
stations.add(new Station("234", "South Harrow", 51.5646, -0.3521));
stations.add(new Station("235", "South Kensington", 51.4941, -0.1738));
stations.add(new Station("236", "South Kenton", 51.5701, -0.3081));
stations.add(new Station("237", "South Quay", 51.5007, -0.0191));
stations.add(new Station("238", "South Ruislip", 51.5569, -0.3988));
stations.add(new Station("239", "South Wimbledon", 51.4154, -0.1919));
stations.add(new Station("240", "South Woodford", 51.5917, 0.0275));
stations.add(new Station("241", "Stamford Brook", 51.495, -0.2459));
stations.add(new Station("242", "Stanmore", 51.6194, -0.3028));
stations.add(new Station("243", "Stepney Green", 51.5221, -0.047));
stations.add(new Station("244", "Stockwell", 51.4723, -0.123));
stations.add(new Station("245", "Stonebridge Park", 51.5439, -0.2759));
stations.add(new Station("246", "Stratford", 51.5416, -0.0042));
stations.add(new Station("247", "St. James's Park", 51.4994, -0.1335));
stations.add(new Station("248", "St. John's Wood", 51.5347, -0.174));
stations.add(new Station("249", "St. Paul's", 51.5146, -0.0973));
stations.add(new Station("250", "Sudbury Hill", 51.5569, -0.3366));
stations.add(new Station("251", "Sudbury Town", 51.5507, -0.3156));
stations.add(new Station("252", "Surrey Quays", 51.4933, -0.0478));
stations.add(new Station("253", "Swiss Cottage", 51.5432, -0.1738));
stations.add(new Station("254", "Temple", 51.5111, -0.1141));
stations.add(new Station("255", "Theydon Bois", 51.6717, 0.1033));
stations.add(new Station("256", "Tooting Bec", 51.4361, -0.1598));
stations.add(new Station("257", "Tooting Broadway", 51.4275, -0.168));
stations.add(new Station("258", "Tottenham Court Road", 51.5165, -0.131));
stations.add(new Station("259", "Tottenham Hale", 51.5882, -0.0594));
stations.add(new Station("260", "Totteridge & Whetstone", 51.6302, -0.1791));
stations.add(new Station("261", "Tower Gateway", 51.5106, -0.0743));
stations.add(new Station("262", "Tower Hill", 51.5098, -0.0766));
stations.add(new Station("263", "Tufnell Park", 51.5567, -0.1374));
stations.add(new Station("264", "Turnham Green", 51.4951, -0.2547));
stations.add(new Station("265", "Turnpike Lane", 51.5904, -0.1028));
stations.add(new Station("266", "Upminster", 51.559, 0.251));
stations.add(new Station("267", "Upminster Bridge", 51.5582, 0.2343));
stations.add(new Station("268", "Upney", 51.5385, 0.1014));
stations.add(new Station("269", "Upton Park", 51.5352, 0.0343));
stations.add(new Station("270", "Uxbridge", 51.5463, -0.4786));
stations.add(new Station("271", "Vauxhall", 51.4861, -0.1253));
stations.add(new Station("272", "Victoria", 51.4965, -0.1447));
stations.add(new Station("273", "Walthamstow Central", 51.583, -0.0195));
stations.add(new Station("274", "Wanstead", 51.5775, 0.0288));
stations.add(new Station("275", "Wapping", 51.5043, -0.0558));
stations.add(new Station("276", "Warren Street", 51.5247, -0.1384));
stations.add(new Station("277", "Warwick Avenue", 51.5235, -0.1835));
stations.add(new Station("278", "Waterloo", 51.5036, -0.1143));
stations.add(new Station("279", "Watford", 51.6573, -0.4177));
stations.add(new Station("280", "Wembley Central", 51.5519, -0.2963));
stations.add(new Station("281", "Wembley Park", 51.5635, -0.2795));
stations.add(new Station("282", "Westbourne Park", 51.521, -0.2011));
stations.add(new Station("283", "Westferry", 51.5097, -0.0265));
stations.add(new Station("284", "Westminster", 51.501, -0.1254));
stations.add(new Station("285", "West Acton", 51.518, -0.2809));
stations.add(new Station("286", "West Brompton", 51.4872, -0.1953));
stations.add(new Station("287", "West Finchley", 51.6095, -0.1883));
stations.add(new Station("288", "West Ham", 51.5287, 0.0056));
stations.add(new Station("289", "West Hampstead", 51.5469, -0.1906));
stations.add(new Station("290", "West Harrow", 51.5795, -0.3533));
stations.add(new Station("291", "West India Quay", 51.507, -0.0203));
stations.add(new Station("292", "West Kensington", 51.4907, -0.2065));
stations.add(new Station("293", "West Ruislip", 51.5696, -0.4376));
stations.add(new Station("294", "Whitechapel", 51.5194, -0.0612));
stations.add(new Station("295", "White City", 51.512, -0.2239));
stations.add(new Station("296", "Willesden Green", 51.5492, -0.2215));
stations.add(new Station("297", "Willesden Junction", 51.5326, -0.2478));
stations.add(new Station("298", "Wimbledon", 51.4214, -0.2064));
stations.add(new Station("299", "Wimbledon Park", 51.4343, -0.1992));
stations.add(new Station("300", "Woodford", 51.607, 0.0341));
stations.add(new Station("301", "Woodside Park", 51.6179, -0.1856));
stations.add(new Station("302", "Wood Green", 51.5975, -0.1097));
connections.put("1", Stream.of("52","73","73","233","264").collect(Collectors.toSet()));
connections.put("2", Stream.of("156","262","156").collect(Collectors.toSet()));
connections.put("3", Stream.of("262","294","156","294").collect(Collectors.toSet()));
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connections.put("12", Stream.of("56","256").collect(Collectors.toSet()));
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connections.put("26", Stream.of("259","273").collect(Collectors.toSet()));
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connections.put("41", Stream.of("215","252","23","42").collect(Collectors.toSet()));
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connections.put("46", Stream.of("6","50","53").collect(Collectors.toSet()));
connections.put("47", Stream.of("22","40").collect(Collectors.toSet()));
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connections.put("117", Stream.of("116","118").collect(Collectors.toSet()));
connections.put("118", Stream.of("116","117").collect(Collectors.toSet()));
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connections.put("123", Stream.of("95","145").collect(Collectors.toSet()));
connections.put("124", Stream.of("8","77").collect(Collectors.toSet()));
connections.put("125", Stream.of("134","270","134","270").collect(Collectors.toSet()));
connections.put("126", Stream.of("48","258","60","222").collect(Collectors.toSet()));
connections.put("127", Stream.of("186","225").collect(Collectors.toSet()));
connections.put("128", Stream.of("10","39").collect(Collectors.toSet()));
connections.put("129", Stream.of("85","267").collect(Collectors.toSet()));
connections.put("130", Stream.of("131","132").collect(Collectors.toSet()));
connections.put("131", Stream.of("130","189").collect(Collectors.toSet()));
connections.put("132", Stream.of("116","130").collect(Collectors.toSet()));
connections.put("133", Stream.of("107","146").collect(Collectors.toSet()));
connections.put("134", Stream.of("125","219","125","219").collect(Collectors.toSet()));
connections.put("135", Stream.of("64","171").collect(Collectors.toSet()));
connections.put("136", Stream.of("84","190","278").collect(Collectors.toSet()));
connections.put("137", Stream.of("205","297").collect(Collectors.toSet()));
connections.put("138", Stream.of("74").collect(Collectors.toSet()));
connections.put("139", Stream.of("40","263").collect(Collectors.toSet()));
connections.put("140", Stream.of("114","236").collect(Collectors.toSet()));
connections.put("141", Stream.of("108","212").collect(Collectors.toSet()));
connections.put("142", Stream.of("289","296").collect(Collectors.toSet()));
connections.put("143", Stream.of("159","205").collect(Collectors.toSet()));
connections.put("144", Stream.of("206","281").collect(Collectors.toSet()));
connections.put("145", Stream.of("90","92","90","92","90","92","7","89","39","222","89","123").collect(Collectors.toSet()));
connections.put("146", Stream.of("133","235").collect(Collectors.toSet()));
connections.put("147", Stream.of("150","282").collect(Collectors.toSet()));
connections.put("148", Stream.of("84","278").collect(Collectors.toSet()));
connections.put("149", Stream.of("162","207").collect(Collectors.toSet()));
connections.put("150", Stream.of("147","226").collect(Collectors.toSet()));
connections.put("151", Stream.of("49","258","60","196").collect(Collectors.toSet()));
connections.put("152", Stream.of("86").collect(Collectors.toSet()));
connections.put("153", Stream.of("154","246").collect(Collectors.toSet()));
connections.put("154", Stream.of("153","229","274").collect(Collectors.toSet()));
connections.put("155", Stream.of("224","283").collect(Collectors.toSet()));
connections.put("156", Stream.of("13","24","2","167","3","167","2","167").collect(Collectors.toSet()));
connections.put("157", Stream.of("23","232","13","29").collect(Collectors.toSet()));
connections.put("158", Stream.of("37","68").collect(Collectors.toSet()));
connections.put("159", Stream.of("143","277").collect(Collectors.toSet()));
connections.put("160", Stream.of("95","265").collect(Collectors.toSet()));
connections.put("161", Stream.of("25","44","25","44").collect(Collectors.toSet()));
connections.put("162", Stream.of("28","149").collect(Collectors.toSet()));
connections.put("163", Stream.of("11","82").collect(Collectors.toSet()));
connections.put("164", Stream.of("24","246","33","243","33","243").collect(Collectors.toSet()));
connections.put("165", Stream.of("93").collect(Collectors.toSet()));
connections.put("166", Stream.of("44","262","44","262").collect(Collectors.toSet()));
connections.put("167", Stream.of("14","156","14","156","14","156","13","188").collect(Collectors.toSet()));
connections.put("168", Stream.of("62","179","213").collect(Collectors.toSet()));
connections.put("169", Stream.of("239").collect(Collectors.toSet()));
connections.put("170", Stream.of("40","89").collect(Collectors.toSet()));
connections.put("171", Stream.of("61","135").collect(Collectors.toSet()));
connections.put("172", Stream.of("71","281").collect(Collectors.toSet()));
connections.put("173", Stream.of("16","98").collect(Collectors.toSet()));
connections.put("174", Stream.of("252").collect(Collectors.toSet()));
connections.put("175", Stream.of("252").collect(Collectors.toSet()));
connections.put("176", Stream.of("30","233").collect(Collectors.toSet()));
connections.put("177", Stream.of("105","238").collect(Collectors.toSet()));
connections.put("178", Stream.of("115","201").collect(Collectors.toSet()));
connections.put("179", Stream.of("168","180").collect(Collectors.toSet()));
connections.put("180", Stream.of("179","198").collect(Collectors.toSet()));
connections.put("181", Stream.of("76","112","285").collect(Collectors.toSet()));
connections.put("182", Stream.of("73","193").collect(Collectors.toSet()));
connections.put("183", Stream.of("42","43").collect(Collectors.toSet()));
connections.put("184", Stream.of("115","198").collect(Collectors.toSet()));
connections.put("185", Stream.of("236","280").collect(Collectors.toSet()));
connections.put("186", Stream.of("127","207","18","122","18","122").collect(Collectors.toSet()));
connections.put("187", Stream.of("57","231").collect(Collectors.toSet()));
connections.put("188", Stream.of("7","167").collect(Collectors.toSet()));
connections.put("189", Stream.of("30","131").collect(Collectors.toSet()));
connections.put("190", Stream.of("136","244").collect(Collectors.toSet()));
connections.put("191", Stream.of("196","211","28","258","107","276").collect(Collectors.toSet()));
connections.put("192", Stream.of("82","277","18","83","18","83","83","217").collect(Collectors.toSet()));
connections.put("193", Stream.of("5","182").collect(Collectors.toSet()));
connections.put("194", Stream.of("96","204").collect(Collectors.toSet()));
connections.put("195", Stream.of("105","112").collect(Collectors.toSet()));
connections.put("196", Stream.of("49","191","107","151").collect(Collectors.toSet()));
connections.put("197", Stream.of("271","272").collect(Collectors.toSet()));
connections.put("198", Stream.of("180","184").collect(Collectors.toSet()));
connections.put("199", Stream.of("269","288","269","288").collect(Collectors.toSet()));
connections.put("200", Stream.of("4","27","283","291").collect(Collectors.toSet()));
connections.put("201", Stream.of("178","281").collect(Collectors.toSet()));
connections.put("202", Stream.of("63","216").collect(Collectors.toSet()));
connections.put("203", Stream.of("32","246").collect(Collectors.toSet()));
connections.put("204", Stream.of("80","194").collect(Collectors.toSet()));
connections.put("205", Stream.of("137","143").collect(Collectors.toSet()));
connections.put("206", Stream.of("45","144").collect(Collectors.toSet()));
connections.put("207", Stream.of("149","186").collect(Collectors.toSet()));
connections.put("208", Stream.of("110","241").collect(Collectors.toSet()));
connections.put("209", Stream.of("75","290","75","234").collect(Collectors.toSet()));
connections.put("210", Stream.of("98","274").collect(Collectors.toSet()));
connections.put("211", Stream.of("11","191").collect(Collectors.toSet()));
connections.put("212", Stream.of("141").collect(Collectors.toSet()));
connections.put("213", Stream.of("53","168").collect(Collectors.toSet()));
connections.put("214", Stream.of("51","300").collect(Collectors.toSet()));
connections.put("215", Stream.of("41","275").collect(Collectors.toSet()));
connections.put("216", Stream.of("20","202").collect(Collectors.toSet()));
connections.put("217", Stream.of("192","282").collect(Collectors.toSet()));
connections.put("218", Stream.of("43","63").collect(Collectors.toSet()));
connections.put("219", Stream.of("134","221","134","221").collect(Collectors.toSet()));
connections.put("220", Stream.of("238","293").collect(Collectors.toSet()));
connections.put("221", Stream.of("75","219","75","219").collect(Collectors.toSet()));
connections.put("222", Stream.of("126","145").collect(Collectors.toSet()));
connections.put("223", Stream.of("95","259").collect(Collectors.toSet()));
connections.put("224", Stream.of("13","155","261","275","294").collect(Collectors.toSet()));
connections.put("225", Stream.of("127","295").collect(Collectors.toSet()));
connections.put("226", Stream.of("101","150").collect(Collectors.toSet()));
connections.put("227", Stream.of("294").collect(Collectors.toSet()));
connections.put("228", Stream.of("235","272","235","272").collect(Collectors.toSet()));
connections.put("229", Stream.of("154","240").collect(Collectors.toSet()));
connections.put("230", Stream.of("80","299").collect(Collectors.toSet()));
connections.put("231", Stream.of("9","187").collect(Collectors.toSet()));
connections.put("232", Stream.of("157","278").collect(Collectors.toSet()));
connections.put("233", Stream.of("1","176").collect(Collectors.toSet()));
connections.put("234", Stream.of("209","250").collect(Collectors.toSet()));
connections.put("235", Stream.of("99","228","99","228","99","146").collect(Collectors.toSet()));
connections.put("236", Stream.of("140","185").collect(Collectors.toSet()));
connections.put("237", Stream.of("61","120").collect(Collectors.toSet()));
connections.put("238", Stream.of("177","220").collect(Collectors.toSet()));
connections.put("239", Stream.of("59","169").collect(Collectors.toSet()));
connections.put("240", Stream.of("229","300").collect(Collectors.toSet()));
connections.put("241", Stream.of("208","264").collect(Collectors.toSet()));
connections.put("242", Stream.of("45").collect(Collectors.toSet()));
connections.put("243", Stream.of("164","294","164","294").collect(Collectors.toSet()));
connections.put("244", Stream.of("55","190","35","271").collect(Collectors.toSet()));
connections.put("245", Stream.of("113","280").collect(Collectors.toSet()));
connections.put("246", Stream.of("153","164","203","288").collect(Collectors.toSet()));
connections.put("247", Stream.of("272","284","272","284").collect(Collectors.toSet()));
connections.put("248", Stream.of("11","253").collect(Collectors.toSet()));
connections.put("249", Stream.of("13","48").collect(Collectors.toSet()));
connections.put("250", Stream.of("234","251").collect(Collectors.toSet()));
connections.put("251", Stream.of("5","250").collect(Collectors.toSet()));
connections.put("252", Stream.of("41","174","175").collect(Collectors.toSet()));
connections.put("253", Stream.of("94","248").collect(Collectors.toSet()));
connections.put("254", Stream.of("25","87","25","87").collect(Collectors.toSet()));
connections.put("255", Stream.of("68","88").collect(Collectors.toSet()));
connections.put("256", Stream.of("12","257").collect(Collectors.toSet()));
connections.put("257", Stream.of("59","256").collect(Collectors.toSet()));
connections.put("258", Stream.of("126","191","102","151").collect(Collectors.toSet()));
connections.put("259", Stream.of("26","223").collect(Collectors.toSet()));
connections.put("260", Stream.of("121","301").collect(Collectors.toSet()));
connections.put("261", Stream.of("224").collect(Collectors.toSet()));
connections.put("262", Stream.of("2","166","3","166").collect(Collectors.toSet()));
connections.put("263", Stream.of("8","139").collect(Collectors.toSet()));
connections.put("264", Stream.of("52","108","241","1","110").collect(Collectors.toSet()));
connections.put("265", Stream.of("160","302").collect(Collectors.toSet()));
connections.put("266", Stream.of("267").collect(Collectors.toSet()));
connections.put("267", Stream.of("129","266").collect(Collectors.toSet()));
connections.put("268", Stream.of("15","21").collect(Collectors.toSet()));
connections.put("269", Stream.of("78","199","78","199").collect(Collectors.toSet()));
connections.put("270", Stream.of("125","125").collect(Collectors.toSet()));
connections.put("271", Stream.of("197","244").collect(Collectors.toSet()));
connections.put("272", Stream.of("228","247","228","247","107","197").collect(Collectors.toSet()));
connections.put("273", Stream.of("26").collect(Collectors.toSet()));
connections.put("274", Stream.of("154","210").collect(Collectors.toSet()));
connections.put("275", Stream.of("215","224").collect(Collectors.toSet()));
connections.put("276", Stream.of("89","102","89","191").collect(Collectors.toSet()));
connections.put("277", Stream.of("159","192").collect(Collectors.toSet()));
connections.put("278", Stream.of("87","148","232","284","87","136","13").collect(Collectors.toSet()));
connections.put("279", Stream.of("62").collect(Collectors.toSet()));
connections.put("280", Stream.of("185","245").collect(Collectors.toSet()));
connections.put("281", Stream.of("144","172","94","201").collect(Collectors.toSet()));
connections.put("282", Stream.of("147","217").collect(Collectors.toSet()));
connections.put("283", Stream.of("155","200","291").collect(Collectors.toSet()));
connections.put("284", Stream.of("87","247","87","247","107","278").collect(Collectors.toSet()));
connections.put("285", Stream.of("72","181").collect(Collectors.toSet()));
connections.put("286", Stream.of("74","96").collect(Collectors.toSet()));
connections.put("287", Stream.of("93","301").collect(Collectors.toSet()));
connections.put("288", Stream.of("36","199","36","199","43","246").collect(Collectors.toSet()));
connections.put("289", Stream.of("94","142").collect(Collectors.toSet()));
connections.put("290", Stream.of("115","209").collect(Collectors.toSet()));
connections.put("291", Stream.of("42","200","283").collect(Collectors.toSet()));
connections.put("292", Stream.of("17","74").collect(Collectors.toSet()));
connections.put("293", Stream.of("220").collect(Collectors.toSet()));
connections.put("294", Stream.of("3","243","224","227","3","243").collect(Collectors.toSet()));
connections.put("295", Stream.of("76","225").collect(Collectors.toSet()));
connections.put("296", Stream.of("71","142").collect(Collectors.toSet()));
connections.put("297", Stream.of("113","137").collect(Collectors.toSet()));
connections.put("298", Stream.of("299").collect(Collectors.toSet()));
connections.put("299", Stream.of("230","298").collect(Collectors.toSet()));
connections.put("300", Stream.of("37","214","240").collect(Collectors.toSet()));
connections.put("301", Stream.of("260","287").collect(Collectors.toSet()));
connections.put("302", Stream.of("31","265").collect(Collectors.toSet()));
underground = new Graph<>(stations, connections);
routeFinder = new RouteFinder<>(underground, new HaversineScorer(), new HaversineScorer());
}
@Test
public void findRoute() {
List<Station> route = routeFinder.findRoute(underground.getNode("74"), underground.getNode("7"));
System.out.println(route.stream().map(Station::getName).collect(Collectors.toList()));
}
}

View File

@ -0,0 +1,42 @@
package com.baeldung.algorithms.astar.underground;
import java.util.StringJoiner;
import com.baeldung.algorithms.astar.GraphNode;
public class Station implements GraphNode {
private final String id;
private final String name;
private final double latitude;
private final double longitude;
public Station(String id, String name, double latitude, double longitude) {
this.id = id;
this.name = name;
this.latitude = latitude;
this.longitude = longitude;
}
@Override
public String getId() {
return id;
}
public String getName() {
return name;
}
public double getLatitude() {
return latitude;
}
public double getLongitude() {
return longitude;
}
@Override
public String toString() {
return new StringJoiner(", ", Station.class.getSimpleName() + "[", "]").add("id='" + id + "'")
.add("name='" + name + "'").add("latitude=" + latitude).add("longitude=" + longitude).toString();
}
}

View File

@ -14,8 +14,6 @@ This module contains articles about algorithms. Some classes of algorithms, e.g.
- [A Guide to the Folding Technique in Java](https://www.baeldung.com/folding-hashing-technique)
- [Creating a Triangle with for Loops in Java](https://www.baeldung.com/java-print-triangle)
- [Efficient Word Frequency Calculator in Java](https://www.baeldung.com/java-word-frequency)
- [Interpolation Search in Java](https://www.baeldung.com/java-interpolation-search)
- [The K-Means Clustering Algorithm in Java](https://www.baeldung.com/java-k-means-clustering-algorithm)
- [Creating a Custom Annotation in Java](https://www.baeldung.com/java-custom-annotation)
- [Breadth-First Search Algorithm in Java](https://www.baeldung.com/java-breadth-first-search)
- More articles: [[<-- prev]](/algorithms-miscellaneous-2) [[next -->]](/algorithms-miscellaneous-4)

View File

@ -1,3 +1,4 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
@ -91,4 +92,5 @@
<jmh-core.version>1.19</jmh-core.version>
<jmh-generator.version>1.19</jmh-generator.version>
</properties>
</project>

View File

@ -5,10 +5,10 @@ This module contains articles about algorithms. Some classes of algorithms, e.g.
### Relevant articles:
- [Multi-Swarm Optimization Algorithm in Java](https://www.baeldung.com/java-multi-swarm-algorithm)
- [String Search Algorithms for Large Texts](https://www.baeldung.com/java-full-text-search-algorithms)
- [Check If a String Contains All The Letters of The Alphabet](https://www.baeldung.com/java-string-contains-all-letters)
- [Find the Middle Element of a Linked List](https://www.baeldung.com/java-linked-list-middle-element)
- [Find Substrings That Are Palindromes in Java](https://www.baeldung.com/java-palindrome-substrings)
- [Find the Longest Substring without Repeating Characters](https://www.baeldung.com/java-longest-substring-without-repeated-characters)
- [Permutations of an Array in Java](https://www.baeldung.com/java-array-permutations)
- [Find the Smallest Missing Integer in an Array](https://www.baeldung.com/java-smallest-missing-integer-in-array)
- More articles: [[<-- prev]](/algorithms-miscellaneous-3) [[next -->]](/algorithms-miscellaneous-5)

View File

@ -1,5 +1,6 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>algorithms-miscellaneous-4</artifactId>
<version>0.0.1-SNAPSHOT</version>

View File

@ -1,25 +0,0 @@
package com.baeldung.algorithms;
import org.junit.Assert;
import org.junit.Test;
import com.baeldung.algorithms.string.search.StringSearchAlgorithms;
public class StringSearchAlgorithmsUnitTest {
@Test
public void testStringSearchAlgorithms(){
String text = "This is some nice text.";
String pattern = "some";
int realPosition = text.indexOf(pattern);
Assert.assertTrue(realPosition == StringSearchAlgorithms.simpleTextSearch(pattern.toCharArray(), text.toCharArray()));
Assert.assertTrue(realPosition == StringSearchAlgorithms.RabinKarpMethod(pattern.toCharArray(), text.toCharArray()));
Assert.assertTrue(realPosition == StringSearchAlgorithms.KnuthMorrisPrattSearch(pattern.toCharArray(), text.toCharArray()));
Assert.assertTrue(realPosition == StringSearchAlgorithms.BoyerMooreHorspoolSimpleSearch(pattern.toCharArray(), text.toCharArray()));
Assert.assertTrue(realPosition == StringSearchAlgorithms.BoyerMooreHorspoolSearch(pattern.toCharArray(), text.toCharArray()));
}
}

View File

@ -85,4 +85,13 @@ class SmallestMissingPositiveIntegerUnitTest {
assertThat(result).isEqualTo(input.length);
}
@Test
void givenArrayWithoutZero_whenSearchInUnsortedArrayBooleanArray_thenZero() {
int[] input = new int[] {11, 13, 14, 15};
int result = SmallestMissingPositiveInteger.searchInUnsortedArrayBooleanArray(input);
assertThat(result).isEqualTo(0);
}
}

View File

@ -9,4 +9,5 @@ This module contains articles about algorithms. Some classes of algorithms, e.g.
- [Reversing a Binary Tree in Java](https://www.baeldung.com/java-reversing-a-binary-tree)
- [Find If Two Numbers Are Relatively Prime in Java](https://www.baeldung.com/java-two-relatively-prime-numbers)
- [Knapsack Problem Implementation in Java](https://www.baeldung.com/java-knapsack)
- [How to Determine if a Binary Tree is Balanced](https://www.baeldung.com/java-balanced-binary-tree)
- More articles: [[<-- prev]](/../algorithms-miscellaneous-4)

View File

@ -1,5 +1,6 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>algorithms-miscellaneous-5</artifactId>
<version>0.0.1-SNAPSHOT</version>
@ -17,6 +18,11 @@
<artifactId>commons-codec</artifactId>
<version>${commons-codec.version}</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-math3</artifactId>
<version>${commons-math3.version}</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
@ -28,6 +34,7 @@
<artifactId>tradukisto</artifactId>
<version>${tradukisto.version}</version>
</dependency>
<dependency>
<groupId>org.assertj</groupId>
<artifactId>assertj-core</artifactId>
@ -52,6 +59,7 @@
<tradukisto.version>1.0.1</tradukisto.version>
<org.assertj.core.version>3.9.0</org.assertj.core.version>
<commons-codec.version>1.11</commons-codec.version>
<commons-math3.version>3.6.1</commons-math3.version>
</properties>
</project>

View File

@ -0,0 +1,83 @@
package com.baeldung.algorithms.caesarcipher;
import org.apache.commons.math3.stat.inference.ChiSquareTest;
import java.util.Arrays;
import java.util.stream.IntStream;
public class CaesarCipher {
private static final char LETTER_A = 'a';
private static final char LETTER_Z = 'z';
private static final int ALPHABET_SIZE = LETTER_Z - LETTER_A + 1;
private static final double[] ENGLISH_LETTERS_PROBABILITIES = {0.073, 0.009, 0.030, 0.044, 0.130, 0.028, 0.016, 0.035, 0.074, 0.002, 0.003, 0.035, 0.025, 0.078, 0.074, 0.027, 0.003, 0.077, 0.063, 0.093, 0.027, 0.013, 0.016, 0.005, 0.019, 0.001};
public String cipher(String message, int offset) {
StringBuilder result = new StringBuilder();
for (char character : message.toCharArray()) {
if (character != ' ') {
int originalAlphabetPosition = character - LETTER_A;
int newAlphabetPosition = (originalAlphabetPosition + offset) % ALPHABET_SIZE;
char newCharacter = (char) (LETTER_A + newAlphabetPosition);
result.append(newCharacter);
} else {
result.append(character);
}
}
return result.toString();
}
public String decipher(String message, int offset) {
return cipher(message, ALPHABET_SIZE - (offset % ALPHABET_SIZE));
}
public int breakCipher(String message) {
return probableOffset(chiSquares(message));
}
private double[] chiSquares(String message) {
double[] expectedLettersFrequencies = expectedLettersFrequencies(message.length());
double[] chiSquares = new double[ALPHABET_SIZE];
for (int offset = 0; offset < chiSquares.length; offset++) {
String decipheredMessage = decipher(message, offset);
long[] lettersFrequencies = observedLettersFrequencies(decipheredMessage);
double chiSquare = new ChiSquareTest().chiSquare(expectedLettersFrequencies, lettersFrequencies);
chiSquares[offset] = chiSquare;
}
return chiSquares;
}
private long[] observedLettersFrequencies(String message) {
return IntStream.rangeClosed(LETTER_A, LETTER_Z)
.mapToLong(letter -> countLetter((char) letter, message))
.toArray();
}
private long countLetter(char letter, String message) {
return message.chars()
.filter(character -> character == letter)
.count();
}
private double[] expectedLettersFrequencies(int messageLength) {
return Arrays.stream(ENGLISH_LETTERS_PROBABILITIES)
.map(probability -> probability * messageLength)
.toArray();
}
private int probableOffset(double[] chiSquares) {
int probableOffset = 0;
for (int offset = 0; offset < chiSquares.length; offset++) {
System.out.println(String.format("Chi-Square for offset %d: %.2f", offset, chiSquares[offset]));
if (chiSquares[offset] < chiSquares[probableOffset]) {
probableOffset = offset;
}
}
return probableOffset;
}
}

View File

@ -0,0 +1,67 @@
package com.baeldung.algorithms.combinatorics;
import java.util.*;
import static java.util.Collections.swap;
public class Combinatorics {
public static List<List<Integer>> permutations(List<Integer> sequence) {
List<List<Integer>> results = new ArrayList<>();
permutationsInternal(sequence, results, 0);
return results;
}
private static void permutationsInternal(List<Integer> sequence, List<List<Integer>> results, int index) {
if (index == sequence.size() - 1) {
results.add(new ArrayList<>(sequence));
}
for (int i = index; i < sequence.size(); i++) {
swap(sequence, i, index);
permutationsInternal(sequence, results, index + 1);
swap(sequence, i, index);
}
}
public static List<List<Integer>> combinations(List<Integer> inputSet, int k) {
List<List<Integer>> results = new ArrayList<>();
combinationsInternal(inputSet, k, results, new ArrayList<>(), 0);
return results;
}
private static void combinationsInternal(
List<Integer> inputSet, int k, List<List<Integer>> results, ArrayList<Integer> accumulator, int index) {
int leftToAccumulate = k - accumulator.size();
int possibleToAcculumate = inputSet.size() - index;
if (accumulator.size() == k) {
results.add(new ArrayList<>(accumulator));
} else if (leftToAccumulate <= possibleToAcculumate) {
combinationsInternal(inputSet, k, results, accumulator, index + 1);
accumulator.add(inputSet.get(index));
combinationsInternal(inputSet, k, results, accumulator, index + 1);
accumulator.remove(accumulator.size() - 1);
}
}
public static List<List<Character>> powerSet(List<Character> sequence) {
List<List<Character>> results = new ArrayList<>();
powerSetInternal(sequence, results, new ArrayList<>(), 0);
return results;
}
private static void powerSetInternal(
List<Character> set, List<List<Character>> powerSet, List<Character> accumulator, int index) {
if (index == set.size()) {
powerSet.add(new ArrayList<>(accumulator));
} else {
accumulator.add(set.get(index));
powerSetInternal(set, powerSet, accumulator, index + 1);
accumulator.remove(accumulator.size() - 1);
powerSetInternal(set, powerSet, accumulator, index + 1);
}
}
}

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@ -0,0 +1,83 @@
package com.baeldung.algorithms.caesarcipher;
import org.junit.jupiter.api.Test;
import static org.assertj.core.api.Assertions.assertThat;
class CaesarCipherUnitTest {
private static final String SENTENCE = "he told me i could never teach a llama to drive";
private static final String SENTENCE_SHIFTED_THREE = "kh wrog ph l frxog qhyhu whdfk d oodpd wr gulyh";
private static final String SENTENCE_SHIFTED_TEN = "ro dyvn wo s myevn xofob dokmr k vvkwk dy nbsfo";
private CaesarCipher algorithm = new CaesarCipher();
@Test
void givenSentenceAndShiftThree_whenCipher_thenCipheredMessageWithoutOverflow() {
String cipheredSentence = algorithm.cipher(SENTENCE, 3);
assertThat(cipheredSentence)
.isEqualTo(SENTENCE_SHIFTED_THREE);
}
@Test
void givenSentenceAndShiftTen_whenCipher_thenCipheredMessageWithOverflow() {
String cipheredSentence = algorithm.cipher(SENTENCE, 10);
assertThat(cipheredSentence)
.isEqualTo(SENTENCE_SHIFTED_TEN);
}
@Test
void givenSentenceAndShiftThirtySix_whenCipher_thenCipheredLikeTenMessageWithOverflow() {
String cipheredSentence = algorithm.cipher(SENTENCE, 36);
assertThat(cipheredSentence)
.isEqualTo(SENTENCE_SHIFTED_TEN);
}
@Test
void givenSentenceShiftedThreeAndShiftThree_whenDecipher_thenOriginalSentenceWithoutOverflow() {
String decipheredSentence = algorithm.decipher(SENTENCE_SHIFTED_THREE, 3);
assertThat(decipheredSentence)
.isEqualTo(SENTENCE);
}
@Test
void givenSentenceShiftedTenAndShiftTen_whenDecipher_thenOriginalSentenceWithOverflow() {
String decipheredSentence = algorithm.decipher(SENTENCE_SHIFTED_TEN, 10);
assertThat(decipheredSentence)
.isEqualTo(SENTENCE);
}
@Test
void givenSentenceShiftedTenAndShiftThirtySix_whenDecipher_thenOriginalSentenceWithOverflow() {
String decipheredSentence = algorithm.decipher(SENTENCE_SHIFTED_TEN, 36);
assertThat(decipheredSentence)
.isEqualTo(SENTENCE);
}
@Test
void givenSentenceShiftedThree_whenBreakCipher_thenOriginalSentence() {
int offset = algorithm.breakCipher(SENTENCE_SHIFTED_THREE);
assertThat(offset)
.isEqualTo(3);
assertThat(algorithm.decipher(SENTENCE_SHIFTED_THREE, offset))
.isEqualTo(SENTENCE);
}
@Test
void givenSentenceShiftedTen_whenBreakCipher_thenOriginalSentence() {
int offset = algorithm.breakCipher(SENTENCE_SHIFTED_TEN);
assertThat(offset)
.isEqualTo(10);
assertThat(algorithm.decipher(SENTENCE_SHIFTED_TEN, offset))
.isEqualTo(SENTENCE);
}
}

View File

@ -0,0 +1,80 @@
package com.baeldung.algorithms.combinatorics;
import java.util.Arrays;
import java.util.HashSet;
import java.util.List;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertSame;
public class CombinatoricsUnitTest {
@Test
public void givenEmptySequence_whenCallingPermutations_ShouldReturnEmptyList() {
List<Integer> sequence = Arrays.asList();
List<List<Integer>> permutations = Combinatorics.permutations(sequence);
assertEquals(0, permutations.size());
}
@Test
public void givenOneElementSequence_whenCallingPermutations_ShouldReturnPermutations() {
List<Integer> sequence = Arrays.asList(1);
List<List<Integer>> permutations = Combinatorics.permutations(sequence);
assertEquals(1, permutations.size());
assertEquals(1, permutations.get(0).size());
assertSame(1, permutations.get(0).get(0));
}
@Test
public void givenFourElementsSequence_whenCallingPermutations_ShouldReturnPermutations() {
List<Integer> sequence = Arrays.asList(1, 2, 3, 4);
List<List<Integer>> permutations = Combinatorics.permutations(sequence);
assertEquals(24, permutations.size());
assertEquals(24, new HashSet<>(permutations).size());
}
@Test
public void givenTwoElements_whenCalling3Combinations_ShouldReturnEmptyList() {
List<Integer> set = Arrays.asList(1, 2);
List<List<Integer>> combinations = Combinatorics.combinations(set, 3);
assertEquals(0, combinations.size());
}
@Test
public void givenThreeElements_whenCalling3Combinations_ShouldReturnOneCombination() {
List<Integer> set = Arrays.asList(1, 2, 3);
List<List<Integer>> combinations = Combinatorics.combinations(set, 3);
assertEquals(1, combinations.size());
assertEquals(combinations.get(0), Arrays.asList(1, 2, 3));
}
@Test
public void givenFourElements_whenCalling2Combinations_ShouldReturnCombinations() {
List<Integer> set = Arrays.asList(1, 2, 3, 4);
List<List<Integer>> combinations = Combinatorics.combinations(set, 2);
assertEquals(6, combinations.size());
assertEquals(6, new HashSet<>(combinations).size());
}
@Test
public void givenFourElements_whenCallingPowerSet_ShouldReturn15Sets() {
List<Character> sequence = Arrays.asList('a', 'b', 'c', 'd');
List<List<Character>> combinations = Combinatorics.powerSet(sequence);
assertEquals(16, combinations.size());
}
}

View File

@ -0,0 +1,11 @@
## Algorithms - Searching
This module contains articles about searching algorithms.
### Relevant articles:
- [Binary Search Algorithm in Java](https://www.baeldung.com/java-binary-search)
- [Depth First Search in Java](https://www.baeldung.com/java-depth-first-search)
- [Interpolation Search in Java](https://www.baeldung.com/java-interpolation-search)
- [Breadth-First Search Algorithm in Java](https://www.baeldung.com/java-breadth-first-search)
- [String Search Algorithms for Large Texts](https://www.baeldung.com/java-full-text-search-algorithms)
- [Monte Carlo Tree Search for Tic-Tac-Toe Game](https://www.baeldung.com/java-monte-carlo-tree-search)

View File

@ -0,0 +1,38 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>algorithms-searching</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>algorithms-searching</name>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>org.assertj</groupId>
<artifactId>assertj-core</artifactId>
<version>${org.assertj.core.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<finalName>algorithms-searching</finalName>
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
</resource>
</resources>
</build>
<properties>
<org.assertj.core.version>3.9.0</org.assertj.core.version>
</properties>
</project>

View File

@ -0,0 +1,227 @@
package com.baeldung.algorithms.dfs;
import java.util.LinkedList;
import java.util.Queue;
import java.util.Stack;
public class BinaryTree {
Node root;
public void add(int value) {
root = addRecursive(root, value);
}
private Node addRecursive(Node current, int value) {
if (current == null) {
return new Node(value);
}
if (value < current.value) {
current.left = addRecursive(current.left, value);
} else if (value > current.value) {
current.right = addRecursive(current.right, value);
}
return current;
}
public boolean isEmpty() {
return root == null;
}
public int getSize() {
return getSizeRecursive(root);
}
private int getSizeRecursive(Node current) {
return current == null ? 0 : getSizeRecursive(current.left) + 1 + getSizeRecursive(current.right);
}
public boolean containsNode(int value) {
return containsNodeRecursive(root, value);
}
private boolean containsNodeRecursive(Node current, int value) {
if (current == null) {
return false;
}
if (value == current.value) {
return true;
}
return value < current.value
? containsNodeRecursive(current.left, value)
: containsNodeRecursive(current.right, value);
}
public void delete(int value) {
root = deleteRecursive(root, value);
}
private Node deleteRecursive(Node current, int value) {
if (current == null) {
return null;
}
if (value == current.value) {
// Case 1: no children
if (current.left == null && current.right == null) {
return null;
}
// Case 2: only 1 child
if (current.right == null) {
return current.left;
}
if (current.left == null) {
return current.right;
}
// Case 3: 2 children
int smallestValue = findSmallestValue(current.right);
current.value = smallestValue;
current.right = deleteRecursive(current.right, smallestValue);
return current;
}
if (value < current.value) {
current.left = deleteRecursive(current.left, value);
return current;
}
current.right = deleteRecursive(current.right, value);
return current;
}
private int findSmallestValue(Node root) {
return root.left == null ? root.value : findSmallestValue(root.left);
}
public void traverseInOrder(Node node) {
if (node != null) {
traverseInOrder(node.left);
visit(node.value);
traverseInOrder(node.right);
}
}
public void traversePreOrder(Node node) {
if (node != null) {
visit(node.value);
traversePreOrder(node.left);
traversePreOrder(node.right);
}
}
public void traversePostOrder(Node node) {
if (node != null) {
traversePostOrder(node.left);
traversePostOrder(node.right);
visit(node.value);
}
}
public void traverseLevelOrder() {
if (root == null) {
return;
}
Queue<Node> nodes = new LinkedList<>();
nodes.add(root);
while (!nodes.isEmpty()) {
Node node = nodes.remove();
System.out.print(" " + node.value);
if (node.left != null) {
nodes.add(node.left);
}
if (node.left != null) {
nodes.add(node.right);
}
}
}
public void traverseInOrderWithoutRecursion() {
Stack<Node> stack = new Stack<Node>();
Node current = root;
stack.push(root);
while(! stack.isEmpty()) {
while(current.left != null) {
current = current.left;
stack.push(current);
}
current = stack.pop();
visit(current.value);
if(current.right != null) {
current = current.right;
stack.push(current);
}
}
}
public void traversePreOrderWithoutRecursion() {
Stack<Node> stack = new Stack<Node>();
Node current = root;
stack.push(root);
while(! stack.isEmpty()) {
current = stack.pop();
visit(current.value);
if(current.right != null)
stack.push(current.right);
if(current.left != null)
stack.push(current.left);
}
}
public void traversePostOrderWithoutRecursion() {
Stack<Node> stack = new Stack<Node>();
Node prev = root;
Node current = root;
stack.push(root);
while (!stack.isEmpty()) {
current = stack.peek();
boolean hasChild = (current.left != null || current.right != null);
boolean isPrevLastChild = (prev == current.right || (prev == current.left && current.right == null));
if (!hasChild || isPrevLastChild) {
current = stack.pop();
visit(current.value);
prev = current;
} else {
if (current.right != null) {
stack.push(current.right);
}
if (current.left != null) {
stack.push(current.left);
}
}
}
}
private void visit(int value) {
System.out.print(" " + value);
}
class Node {
int value;
Node left;
Node right;
Node(int value) {
this.value = value;
right = null;
left = null;
}
}
}

View File

@ -1,4 +1,4 @@
package com.baeldung.graph;
package com.baeldung.algorithms.dfs;
import java.util.ArrayList;
import java.util.HashMap;

View File

@ -1,9 +1,9 @@
package com.baeldung.algorithms.string.search;
package com.baeldung.algorithms.textsearch;
import java.math.BigInteger;
import java.util.Random;
public class StringSearchAlgorithms {
public class TextSearchAlgorithms {
public static long getBiggerPrime(int m) {
BigInteger prime = BigInteger.probablePrime(getNumberOfBits(m) + 1, new Random());
return prime.longValue();

View File

@ -2,10 +2,8 @@ package com.baeldung.algorithms.binarysearch;
import java.util.Arrays;
import java.util.List;
import org.junit.Assert;
import org.junit.Test;
import com.baeldung.algorithms.binarysearch.BinarySearch;
public class BinarySearchUnitTest {

View File

@ -0,0 +1,136 @@
package com.baeldung.algorithms.dfs;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import org.junit.Test;
public class BinaryTreeUnitTest {
@Test
public void givenABinaryTree_WhenAddingElements_ThenTreeNotEmpty() {
BinaryTree bt = createBinaryTree();
assertTrue(!bt.isEmpty());
}
@Test
public void givenABinaryTree_WhenAddingElements_ThenTreeContainsThoseElements() {
BinaryTree bt = createBinaryTree();
assertTrue(bt.containsNode(6));
assertTrue(bt.containsNode(4));
assertFalse(bt.containsNode(1));
}
@Test
public void givenABinaryTree_WhenAddingExistingElement_ThenElementIsNotAdded() {
BinaryTree bt = createBinaryTree();
int initialSize = bt.getSize();
assertTrue(bt.containsNode(3));
bt.add(3);
assertEquals(initialSize, bt.getSize());
}
@Test
public void givenABinaryTree_WhenLookingForNonExistingElement_ThenReturnsFalse() {
BinaryTree bt = createBinaryTree();
assertFalse(bt.containsNode(99));
}
@Test
public void givenABinaryTree_WhenDeletingElements_ThenTreeDoesNotContainThoseElements() {
BinaryTree bt = createBinaryTree();
assertTrue(bt.containsNode(9));
bt.delete(9);
assertFalse(bt.containsNode(9));
}
@Test
public void givenABinaryTree_WhenDeletingNonExistingElement_ThenTreeDoesNotDelete() {
BinaryTree bt = createBinaryTree();
int initialSize = bt.getSize();
assertFalse(bt.containsNode(99));
bt.delete(99);
assertFalse(bt.containsNode(99));
assertEquals(initialSize, bt.getSize());
}
@Test
public void it_deletes_the_root() {
int value = 12;
BinaryTree bt = new BinaryTree();
bt.add(value);
assertTrue(bt.containsNode(value));
bt.delete(value);
assertFalse(bt.containsNode(value));
}
@Test
public void givenABinaryTree_WhenTraversingInOrder_ThenPrintValues() {
BinaryTree bt = createBinaryTree();
bt.traverseInOrder(bt.root);
System.out.println();
bt.traverseInOrderWithoutRecursion();
}
@Test
public void givenABinaryTree_WhenTraversingPreOrder_ThenPrintValues() {
BinaryTree bt = createBinaryTree();
bt.traversePreOrder(bt.root);
System.out.println();
bt.traversePreOrderWithoutRecursion();
}
@Test
public void givenABinaryTree_WhenTraversingPostOrder_ThenPrintValues() {
BinaryTree bt = createBinaryTree();
bt.traversePostOrder(bt.root);
System.out.println();
bt.traversePostOrderWithoutRecursion();
}
@Test
public void givenABinaryTree_WhenTraversingLevelOrder_ThenPrintValues() {
BinaryTree bt = createBinaryTree();
bt.traverseLevelOrder();
}
private BinaryTree createBinaryTree() {
BinaryTree bt = new BinaryTree();
bt.add(6);
bt.add(4);
bt.add(8);
bt.add(3);
bt.add(5);
bt.add(7);
bt.add(9);
return bt;
}
}

View File

@ -1,7 +1,8 @@
package com.baeldung.graph;
package com.baeldung.algorithms.dfs;
import java.util.List;
import com.baeldung.algorithms.dfs.Graph;
import org.junit.Test;
public class GraphUnitTest {

View File

@ -1,10 +1,10 @@
package com.baeldung.algorithms.interpolationsearch;
import static org.junit.jupiter.api.Assertions.assertEquals;
import org.junit.Before;
import org.junit.Test;
import static org.junit.jupiter.api.Assertions.assertEquals;
public class InterpolationSearchUnitTest {
private int[] myData;

View File

@ -0,0 +1,23 @@
package com.baeldung.algorithms.textsearch;
import org.junit.Assert;
import org.junit.Test;
public class TextSearchAlgorithmsUnitTest {
@Test
public void testStringSearchAlgorithms() {
String text = "This is some nice text.";
String pattern = "some";
int realPosition = text.indexOf(pattern);
Assert.assertTrue(realPosition == TextSearchAlgorithms.simpleTextSearch(pattern.toCharArray(), text.toCharArray()));
Assert.assertTrue(realPosition == TextSearchAlgorithms.RabinKarpMethod(pattern.toCharArray(), text.toCharArray()));
Assert.assertTrue(realPosition == TextSearchAlgorithms.KnuthMorrisPrattSearch(pattern.toCharArray(), text.toCharArray()));
Assert.assertTrue(realPosition == TextSearchAlgorithms.BoyerMooreHorspoolSimpleSearch(pattern.toCharArray(), text.toCharArray()));
Assert.assertTrue(realPosition == TextSearchAlgorithms.BoyerMooreHorspoolSearch(pattern.toCharArray(), text.toCharArray()));
}
}

View File

@ -1,5 +1,6 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>algorithms-sorting</artifactId>
<version>0.0.1-SNAPSHOT</version>

View File

@ -1,5 +1,6 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>animal-sniffer-mvn-plugin</artifactId>
<version>1.0-SNAPSHOT</version>
@ -43,4 +44,5 @@
<animal-sniffer-maven-plugin.version>1.16</animal-sniffer-maven-plugin.version>
<org.codehaus.mojo.signature.java16.version>1.0</org.codehaus.mojo.signature.java16.version>
</properties>
</project>

View File

@ -1,6 +1,6 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>annotation-processing</artifactId>
<name>annotation-processing</name>

View File

@ -1,13 +1,13 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>annotation-user</artifactId>
<name>annotation-user</name>
<parent>
<artifactId>annotations</artifactId>
<groupId>com.baeldung</groupId>
<artifactId>annotations</artifactId>
<version>1.0.0-SNAPSHOT</version>
<relativePath>../</relativePath>
</parent>

View File

@ -1,14 +1,14 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>annotations</artifactId>
<name>annotations</name>
<packaging>pom</packaging>
<parent>
<artifactId>parent-modules</artifactId>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>

View File

@ -1,5 +1,6 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>antlr</artifactId>
<name>antlr</name>
@ -57,4 +58,5 @@
<antlr.version>4.7.1</antlr.version>
<mojo.version>3.0.0</mojo.version>
</properties>
</project>

View File

@ -5,7 +5,7 @@
<modelVersion>4.0.0</modelVersion>
<artifactId>apache-avro</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>apache-avro</name>
<name>apache-avro</name>
<parent>
<groupId>com.baeldung</groupId>

View File

@ -1,7 +1,7 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>apache-bval</groupId>
<artifactId>apache-bval</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>apache-bval</name>

View File

@ -1,9 +1,10 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>apache-curator</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>apache-curator</name>
<name>apache-curator</name>
<packaging>jar</packaging>
<parent>

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@ -1,8 +1,9 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>cxf-aegis</artifactId>
<name>cxf-aegis</name>
<name>cxf-aegis</name>
<parent>
<groupId>com.baeldung</groupId>

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@ -1,10 +1,9 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>cxf-introduction</artifactId>
<name>cxf-introduction</name>
<name>cxf-introduction</name>
<parent>
<groupId>com.baeldung</groupId>

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@ -1,10 +1,9 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>cxf-jaxrs-implementation</artifactId>
<name>cxf-jaxrs-implementation</name>
<name>cxf-jaxrs-implementation</name>
<parent>
<groupId>com.baeldung</groupId>

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@ -1,9 +1,10 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>cxf-spring</artifactId>
<name>cxf-spring</name>
<packaging>war</packaging>
<name>cxf-spring</name>
<parent>
<groupId>com.baeldung</groupId>
@ -98,7 +99,6 @@
</plugins>
</build>
</profile>
</profiles>
<properties>

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@ -1,3 +1,4 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>

View File

@ -16,6 +16,6 @@
<modules>
<module>sse-jaxrs-server</module>
<module>sse-jaxrs-client</module>
</modules>
</modules>
</project>

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@ -1,5 +1,6 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>apache-fop</artifactId>
<version>0.1-SNAPSHOT</version>

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@ -24,4 +24,5 @@
<properties>
<geode.core>1.6.0</geode.core>
</properties>
</project>

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@ -1,5 +1,6 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>apache-meecrowave</artifactId>
<version>0.0.1</version>
@ -52,10 +53,11 @@
<properties>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
<meecrowave-junit.version>1.2.0</meecrowave-junit.version>
<okhttp.version>3.10.0</okhttp.version>
<meecrowave-jpa.version>1.2.1</meecrowave-jpa.version>
<meecrowave-core.version>1.2.1</meecrowave-core.version>
<meecrowave-maven-plugin.version>1.2.1</meecrowave-maven-plugin.version>
<meecrowave-junit.version>1.2.0</meecrowave-junit.version>
<okhttp.version>3.10.0</okhttp.version>
<meecrowave-jpa.version>1.2.1</meecrowave-jpa.version>
<meecrowave-core.version>1.2.1</meecrowave-core.version>
<meecrowave-maven-plugin.version>1.2.1</meecrowave-maven-plugin.version>
</properties>
</project>

View File

@ -1,87 +1,87 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.baeldung.examples.olingo2</groupId>
<artifactId>olingo2</artifactId>
<name>olingo2</name>
<description>Sample Olingo 2 Project</description>
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.baeldung.examples.olingo2</groupId>
<artifactId>olingo2</artifactId>
<name>olingo2</name>
<description>Sample Olingo 2 Project</description>
<parent>
<artifactId>parent-boot-2</artifactId>
<groupId>com.baeldung</groupId>
<artifactId>parent-boot-2</artifactId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../../parent-boot-2</relativePath>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jersey</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-jersey</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<optional>true</optional>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<!-- Olingo 2 Dependencies -->
<dependency>
<groupId>org.apache.olingo</groupId>
<artifactId>olingo-odata2-core</artifactId>
<version>${olingo2.version}</version>
<!-- Avoid jax-rs version conflict by excluding Olingo's version -->
<exclusions>
<exclusion>
<groupId>javax.ws.rs</groupId>
<artifactId>javax.ws.rs-api</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.olingo</groupId>
<artifactId>olingo-odata2-jpa-processor-core</artifactId>
<version>${olingo2.version}</version>
</dependency>
<dependency>
<groupId>org.apache.olingo</groupId>
<artifactId>olingo-odata2-jpa-processor-ref</artifactId>
<version>${olingo2.version}</version>
<exclusions>
<exclusion>
<groupId>org.eclipse.persistence</groupId>
<artifactId>eclipselink</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<!-- Olingo 2 Dependencies -->
<dependency>
<groupId>org.apache.olingo</groupId>
<artifactId>olingo-odata2-core</artifactId>
<version>${olingo2.version}</version>
<!-- Avoid jax-rs version conflict by excluding Olingo's version -->
<exclusions>
<exclusion>
<groupId>javax.ws.rs</groupId>
<artifactId>javax.ws.rs-api</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.olingo</groupId>
<artifactId>olingo-odata2-jpa-processor-core</artifactId>
<version>${olingo2.version}</version>
</dependency>
<dependency>
<groupId>org.apache.olingo</groupId>
<artifactId>olingo-odata2-jpa-processor-ref</artifactId>
<version>${olingo2.version}</version>
<exclusions>
<exclusion>
<groupId>org.eclipse.persistence</groupId>
<artifactId>eclipselink</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
<properties>
<olingo2.version>2.0.11</olingo2.version>
</properties>
<properties>
<olingo2.version>2.0.11</olingo2.version>
</properties>
</project>

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@ -1,6 +1,6 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>apache-opennlp</artifactId>
<version>1.0-SNAPSHOT</version>

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@ -1,5 +1,6 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>apache-poi</artifactId>
<version>0.0.1-SNAPSHOT</version>

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@ -1,6 +1,6 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<modelVersion>4.0.0</modelVersion>
<groupId>com.baeldung.pulsar</groupId>
<artifactId>apache-pulsar</artifactId>
@ -24,6 +24,7 @@
</dependencies>
<properties>
<pulsar-client.version>2.1.1-incubating</pulsar-client.version>
<pulsar-client.version>2.1.1-incubating</pulsar-client.version>
</properties>
</project>

View File

@ -8,8 +8,8 @@
<name>apache-shiro</name>
<parent>
<artifactId>parent-boot-1</artifactId>
<groupId>com.baeldung</groupId>
<artifactId>parent-boot-1</artifactId>
<version>0.0.1-SNAPSHOT</version>
<relativePath>../parent-boot-1</relativePath>
</parent>

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@ -1,5 +1,6 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>apache-solrj</artifactId>
<version>0.0.1-SNAPSHOT</version>

View File

@ -1,90 +1,112 @@
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>apache-spark</artifactId>
<version>1.0-SNAPSHOT</version>
<name>apache-spark</name>
<packaging>jar</packaging>
<url>http://maven.apache.org</url>
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<artifactId>apache-spark</artifactId>
<version>1.0-SNAPSHOT</version>
<name>apache-spark</name>
<packaging>jar</packaging>
<url>http://maven.apache.org</url>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
<dependencies>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-core_2.11</artifactId>
<version>${org.apache.spark.spark-core.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-sql_2.11</artifactId>
<version>${org.apache.spark.spark-sql.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-streaming_2.11</artifactId>
<version>${org.apache.spark.spark-streaming.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-mllib_2.11</artifactId>
<version>${org.apache.spark.spark-mllib.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-streaming-kafka-0-10_2.11</artifactId>
<version>${org.apache.spark.spark-streaming-kafka.version}</version>
</dependency>
<dependency>
<groupId>com.datastax.spark</groupId>
<artifactId>spark-cassandra-connector_2.11</artifactId>
<version>${com.datastax.spark.spark-cassandra-connector.version}</version>
</dependency>
<dependency>
<groupId>com.datastax.spark</groupId>
<artifactId>spark-cassandra-connector-java_2.11</artifactId>
<version>${com.datastax.spark.spark-cassandra-connector-java.version}</version>
</dependency>
</dependencies>
<dependencies>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-core_2.11</artifactId>
<version>${org.apache.spark.spark-core.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-sql_2.11</artifactId>
<version>${org.apache.spark.spark-sql.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-graphx_2.11</artifactId>
<version>${org.apache.spark.spark-graphx.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>graphframes</groupId>
<artifactId>graphframes</artifactId>
<version>${graphframes.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-streaming_2.11</artifactId>
<version>${org.apache.spark.spark-streaming.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-mllib_2.11</artifactId>
<version>${org.apache.spark.spark-mllib.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.apache.spark</groupId>
<artifactId>spark-streaming-kafka-0-10_2.11</artifactId>
<version>${org.apache.spark.spark-streaming-kafka.version}</version>
</dependency>
<dependency>
<groupId>com.datastax.spark</groupId>
<artifactId>spark-cassandra-connector_2.11</artifactId>
<version>${com.datastax.spark.spark-cassandra-connector.version}</version>
</dependency>
<dependency>
<groupId>com.datastax.spark</groupId>
<artifactId>spark-cassandra-connector-java_2.11</artifactId>
<version>${com.datastax.spark.spark-cassandra-connector-java.version}</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
<configuration>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
</plugin>
</plugins>
</build>
<build>
<plugins>
<plugin>
<artifactId>maven-assembly-plugin</artifactId>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
<configuration>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
</configuration>
</plugin>
</plugins>
</build>
<properties>
<org.apache.spark.spark-core.version>2.3.0</org.apache.spark.spark-core.version>
<org.apache.spark.spark-sql.version>2.3.0</org.apache.spark.spark-sql.version>
<org.apache.spark.spark-streaming.version>2.3.0</org.apache.spark.spark-streaming.version>
<org.apache.spark.spark-mllib.version>2.3.0</org.apache.spark.spark-mllib.version>
<org.apache.spark.spark-streaming-kafka.version>2.3.0</org.apache.spark.spark-streaming-kafka.version>
<com.datastax.spark.spark-cassandra-connector.version>2.3.0</com.datastax.spark.spark-cassandra-connector.version>
<com.datastax.spark.spark-cassandra-connector-java.version>1.5.2</com.datastax.spark.spark-cassandra-connector-java.version>
</properties>
<repositories>
<repository>
<id>SparkPackagesRepo</id>
<url>http://dl.bintray.com/spark-packages/maven</url>
</repository>
</repositories>
<properties>
<org.apache.spark.spark-core.version>2.3.0</org.apache.spark.spark-core.version>
<org.apache.spark.spark-sql.version>2.3.0</org.apache.spark.spark-sql.version>
<org.apache.spark.spark-streaming.version>2.3.0</org.apache.spark.spark-streaming.version>
<org.apache.spark.spark-mllib.version>2.3.0</org.apache.spark.spark-mllib.version>
<org.apache.spark.spark-graphx.version>2.3.0</org.apache.spark.spark-graphx.version>
<graphframes.version>0.7.0-spark2.4-s_2.11</graphframes.version>
<org.apache.spark.spark-streaming-kafka.version>2.3.0</org.apache.spark.spark-streaming-kafka.version>
<com.datastax.spark.spark-cassandra-connector.version>2.3.0</com.datastax.spark.spark-cassandra-connector.version>
<com.datastax.spark.spark-cassandra-connector-java.version>1.5.2</com.datastax.spark.spark-cassandra-connector-java.version>
</properties>
</project>

View File

@ -0,0 +1,52 @@
package com.baeldung.graphframes;
import org.apache.log4j.Level;
import org.apache.log4j.Logger;
import org.apache.spark.api.java.function.VoidFunction;
import org.apache.spark.graphx.Edge;
import org.apache.spark.graphx.Graph;
import org.apache.spark.graphx.VertexRDD;
import org.graphframes.GraphFrame;
import scala.Tuple2;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
public class GraphExperiments {
public static Map<Long, User> USERS = new HashMap<>();
public static void main(String[] args) throws IOException {
Logger.getLogger("org").setLevel(Level.OFF);
GraphLoader loader = new GraphLoader();
GraphFrame graph = loader.getGraphFrameUserRelationship();
GraphExperiments experiments = new GraphExperiments();
experiments.doGraphFrameOperations(graph);
experiments.doGraphFrameAlgorithms(graph);
}
private void doGraphFrameOperations(GraphFrame graph) {
graph.vertices().show();
graph.edges().show();
graph.vertices().filter("name = 'Martin'").show();
graph.filterEdges("type = 'Friend'")
.dropIsolatedVertices().vertices().show();
graph.degrees().show();
graph.inDegrees().show();
graph.outDegrees().show();
}
private void doGraphFrameAlgorithms(GraphFrame graph) {
graph.pageRank().maxIter(20).resetProbability(0.15).run().vertices().show();
graph.connectedComponents().run().show();
graph.triangleCount().run().show();
}
}

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@ -0,0 +1,72 @@
package com.baeldung.graphframes;
import org.apache.spark.SparkConf;
import org.apache.spark.api.java.JavaSparkContext;
import org.apache.spark.sql.Dataset;
import org.apache.spark.sql.Row;
import org.apache.spark.sql.SparkSession;
import org.graphframes.GraphFrame;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.List;
public class GraphLoader {
public JavaSparkContext getSparkContext() throws IOException {
Path temp = Files.createTempDirectory("sparkGraphFrames");
SparkConf sparkConf = new SparkConf().setAppName("SparkGraphX").setMaster("local[*]");
JavaSparkContext javaSparkContext = new JavaSparkContext(sparkConf);
javaSparkContext.setCheckpointDir(temp.toString());
return javaSparkContext;
}
public GraphFrame getGraphFrameUserRelationship() throws IOException {
Path temp = Files.createTempDirectory("sparkGraphFrames");
SparkSession session = SparkSession.builder()
.appName("SparkGraphFrameSample")
.config("spark.sql.warehouse.dir", temp.toString())
.sparkContext(getSparkContext().sc())
.master("local[*]")
.getOrCreate();
List<User> users = loadUsers();
Dataset<Row> userDataset = session.createDataFrame(users, User.class);
List<Relationship> relationshipsList = getRelations();
Dataset<Row> relationshipDataset = session.createDataFrame(relationshipsList, Relationship.class);
GraphFrame graphFrame = new GraphFrame(userDataset, relationshipDataset);
return graphFrame;
}
public List<Relationship> getRelations() {
List<Relationship> relationships = new ArrayList<>();
relationships.add(new Relationship("Friend", "1", "2"));
relationships.add(new Relationship("Following", "1", "4"));
relationships.add(new Relationship("Friend", "2", "4"));
relationships.add(new Relationship("Relative", "3", "1"));
relationships.add(new Relationship("Relative", "3", "4"));
return relationships;
}
private List<User> loadUsers() {
User john = new User(1L, "John");
User martin = new User(2L, "Martin");
User peter = new User(3L, "Peter");
User alicia = new User(4L, "Alicia");
List<User> users = new ArrayList<>();
users.add(new User(1L, "John"));
users.add(new User(2L, "Martin"));
users.add(new User(3L, "Peter"));
users.add(new User(4L, "Alicia"));
return users;
}
}

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package com.baeldung.graphframes;
import java.io.Serializable;
import java.util.UUID;
public class Relationship implements Serializable {
private String type;
private String src;
private String dst;
private UUID id;
public Relationship(String type, String src, String dst) {
this.type = type;
this.src = src;
this.dst = dst;
this.id = UUID.randomUUID();
}
public String getId() {
return id.toString();
}
public String getType() {
return type;
}
public String getSrc() {
return src;
}
public String getDst() {
return dst;
}
@Override
public String toString() {
return getSrc() + " -- " + getType() + " --> " + getDst();
}
}

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package com.baeldung.graphframes;
import java.io.Serializable;
public class User implements Serializable {
private Long id;
private String name;
public User(long id, String name) {
this.id = id;
this.name = name;
}
public String getId() {
return id.toString();
}
public String getName() {
return name;
}
@Override
public String toString() {
return "<" + id + "," + name + ">";
}
}

149
apache-tapestry/pom.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://maven.apache.org/POM/4.0.0">
<modelVersion>4.0.0</modelVersion>
<groupId>com.baeldung</groupId>
<artifactId>apache-tapestry</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>apache-tapestry</name>
<packaging>war</packaging>
<dependencies>
<!-- To set up an application with a database, change the artifactId below to
tapestry-hibernate, and add a dependency on your JDBC driver. You'll also
need to add Hibernate configuration files, such as hibernate.cfg.xml. -->
<dependency>
<groupId>org.apache.tapestry</groupId>
<artifactId>tapestry-core</artifactId>
<version>${tapestry-release-version}</version>
</dependency>
<!-- Include the Log4j implementation for the SLF4J logging framework -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>${slf4j-release-version}</version>
</dependency>
<dependency>
<groupId>org.apache.tapestry</groupId>
<artifactId>tapestry-webresources</artifactId>
<version>${tapestry-release-version}</version>
</dependency>
<!-- Uncomment this to add support for file uploads: -->
<!--
<dependency>
<groupId>org.apache.tapestry</groupId>
<artifactId>tapestry-upload</artifactId>
<version>${tapestry-release-version}</version>
</dependency>
-->
<!-- A dependency on either JUnit or TestNG is required, or the surefire plugin (which runs the tests)
will fail, preventing Maven from packaging the WAR. Tapestry includes a large number
of testing facilities designed for use with TestNG (http://testng.org/), so it's recommended. -->
<dependency>
<groupId>org.testng</groupId>
<artifactId>testng</artifactId>
<version>${testng-release-version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.apache.tapestry</groupId>
<artifactId>tapestry-test</artifactId>
<version>${tapestry-release-version}</version>
<scope>test</scope>
</dependency>
<!-- Provided by the servlet container, but sometimes referenced in the application
code. -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>${servlet-api-release-version}</version>
<scope>provided</scope>
</dependency>
<!-- Provide dependency to the Tapestry javadoc taglet which replaces the Maven component report -->
<dependency>
<groupId>org.apache.tapestry</groupId>
<artifactId>tapestry-javadoc</artifactId>
<version>${tapestry-release-version}</version>
<scope>provided</scope>
</dependency>
</dependencies>
<build>
<finalName>apache-tapestry</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
<optimize>true</optimize>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.7.2</version>
<configuration>
<systemPropertyVariables>
<tapestry.execution-mode>Qa</tapestry.execution-mode>
</systemPropertyVariables>
</configuration>
</plugin>
<!-- Run the application using "mvn jetty:run" -->
<plugin>
<groupId>org.mortbay.jetty</groupId>
<artifactId>maven-jetty-plugin</artifactId>
<version>6.1.16</version>
<configuration>
<!-- Log to the console. -->
<requestLog implementation="org.mortbay.jetty.NCSARequestLog">
<!-- This doesn't do anything for Jetty, but is a workaround for a Maven bug
that prevents the requestLog from being set. -->
<append>true</append>
</requestLog>
<systemProperties>
<systemProperty>
<name>tapestry.execution-mode</name>
<value>development</value>
</systemProperty>
</systemProperties>
</configuration>
</plugin>
</plugins>
</build>
<reporting/>
<repositories>
<repository>
<id>jboss</id>
<url>http://repository.jboss.org/nexus/content/groups/public/</url>
</repository>
<!-- This repository is only needed when the Tapestry version is a preview release, rather
than a final release. -->
<repository>
<id>apache-staging</id>
<url>https://repository.apache.org/content/groups/staging/</url>
</repository>
</repositories>
<properties>
<tapestry-release-version>5.4.5</tapestry-release-version>
<servlet-api-release-version>2.5</servlet-api-release-version>
<testng-release-version>6.8.21</testng-release-version>
<slf4j-release-version>1.7.19</slf4j-release-version>
</properties>
</project>

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package com.baeldung.tapestry.components;
import org.apache.tapestry5.BindingConstants;
import org.apache.tapestry5.annotations.Parameter;
import org.apache.tapestry5.annotations.Property;
/**
* Layout component for pages of application.
*/
public class Layout {
@Property
@Parameter(required = true, defaultPrefix = BindingConstants.LITERAL)
private String title;
}

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package com.baeldung.tapestry.pages;
public class Error404 {
}

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package com.baeldung.tapestry.pages;
import java.util.Date;
import org.apache.tapestry5.Block;
import org.apache.tapestry5.annotations.Log;
import org.apache.tapestry5.annotations.Property;
import org.apache.tapestry5.ioc.annotations.Inject;
import org.apache.tapestry5.services.ajax.AjaxResponseRenderer;
import org.slf4j.Logger;
public class Home {
@Property
private String appName = "apache-tapestry";
public Date getCurrentTime() {
return new Date();
}
@Inject
private Logger logger;
@Inject
private AjaxResponseRenderer ajaxResponseRenderer;
@Inject
private Block ajaxBlock;
@Log
void onCallAjax() {
logger.info("Ajax call");
ajaxResponseRenderer.addRender("ajaxZone", ajaxBlock);
}
}

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package com.baeldung.tapestry.pages;
import org.apache.tapestry5.Block;
import org.apache.tapestry5.EventContext;
import org.apache.tapestry5.SymbolConstants;
import org.apache.tapestry5.annotations.InjectPage;
import org.apache.tapestry5.annotations.Log;
import org.apache.tapestry5.annotations.Property;
import org.apache.tapestry5.ioc.annotations.Inject;
import org.apache.tapestry5.ioc.annotations.Symbol;
import org.apache.tapestry5.services.HttpError;
import org.apache.tapestry5.services.ajax.AjaxResponseRenderer;
import org.slf4j.Logger;
import java.util.Date;
/**
* Start page of application apache-tapestry.
*/
public class Index {
@Inject
private Logger logger;
@Inject
private AjaxResponseRenderer ajaxResponseRenderer;
@Property
@Inject
@Symbol(SymbolConstants.TAPESTRY_VERSION)
private String tapestryVersion;
@Inject
private Block block;
// Handle call with an unwanted context
Object onActivate(EventContext eventContext) {
return eventContext.getCount() > 0 ?
new HttpError(404, "Resource not found") :
null;
}
@Log
void onComplete() {
logger.info("Complete call on Index page");
}
@Log
void onAjax() {
logger.info("Ajax call on Index page");
ajaxResponseRenderer.addRender("middlezone", block);
}
public Date getCurrentTime() {
return new Date();
}
}

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package com.baeldung.tapestry.pages;
import org.apache.tapestry5.alerts.AlertManager;
import org.apache.tapestry5.annotations.InjectComponent;
import org.apache.tapestry5.annotations.Property;
import org.apache.tapestry5.corelib.components.Form;
import org.apache.tapestry5.ioc.annotations.Inject;
import org.slf4j.Logger;
public class Login {
@Inject
private Logger logger;
@Inject
private AlertManager alertManager;
@InjectComponent
private Form login;
@Property
private String email;
@Property
private String password;
void onValidateFromLogin() {
if(email == null || password == null) {
alertManager.error("Email/Password is null");
login.recordError("Validation failed");
}
}
Object onSuccessFromLogin() {
alertManager.success("Welcome! Login Successful");
return Home.class;
}
void onFailureFromLogin() {
alertManager.error("Please try again with correct credentials");
}
}

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package com.baeldung.tapestry.services;
import java.io.IOException;
import org.apache.tapestry5.SymbolConstants;
import org.apache.tapestry5.ioc.MappedConfiguration;
import org.apache.tapestry5.ioc.OrderedConfiguration;
import org.apache.tapestry5.ioc.ServiceBinder;
import org.apache.tapestry5.ioc.annotations.Contribute;
import org.apache.tapestry5.ioc.annotations.Local;
import org.apache.tapestry5.ioc.services.ApplicationDefaults;
import org.apache.tapestry5.ioc.services.SymbolProvider;
import org.apache.tapestry5.services.Request;
import org.apache.tapestry5.services.RequestFilter;
import org.apache.tapestry5.services.RequestHandler;
import org.apache.tapestry5.services.Response;
import org.slf4j.Logger;
/**
* This module is automatically included as part of the Tapestry IoC Registry, it's a good place to
* configure and extend Tapestry, or to place your own service definitions.
*/
public class AppModule {
public static void bind(ServiceBinder binder) {
// binder.bind(MyServiceInterface.class, MyServiceImpl.class);
// Make bind() calls on the binder object to define most IoC services.
// Use service builder methods (example below) when the implementation
// is provided inline, or requires more initialization than simply
// invoking the constructor.
}
public static void contributeFactoryDefaults(
MappedConfiguration<String, Object> configuration) {
// The values defined here (as factory default overrides) are themselves
// overridden with application defaults by DevelopmentModule and QaModule.
// The application version is primarily useful as it appears in
// any exception reports (HTML or textual).
configuration.override(SymbolConstants.APPLICATION_VERSION, "0.0.1-SNAPSHOT");
// This is something that should be removed when going to production, but is useful
// in the early stages of development.
configuration.override(SymbolConstants.PRODUCTION_MODE, false);
}
public static void contributeApplicationDefaults(
MappedConfiguration<String, Object> configuration) {
// Contributions to ApplicationDefaults will override any contributions to
// FactoryDefaults (with the same key). Here we're restricting the supported
// locales to just "en" (English). As you add localised message catalogs and other assets,
// you can extend this list of locales (it's a comma separated series of locale names;
// the first locale name is the default when there's no reasonable match).
configuration.add(SymbolConstants.SUPPORTED_LOCALES, "en");
// You should change the passphrase immediately; the HMAC passphrase is used to secure
// the hidden field data stored in forms to encrypt and digitally sign client-side data.
configuration.add(SymbolConstants.HMAC_PASSPHRASE, "change this immediately");
}
/**
* Use annotation or method naming convention: <code>contributeApplicationDefaults</code>
*/
@Contribute(SymbolProvider.class)
@ApplicationDefaults
public static void setupEnvironment(MappedConfiguration<String, Object> configuration) {
// Support for jQuery is new in Tapestry 5.4 and will become the only supported
// option in 5.5.
configuration.add(SymbolConstants.JAVASCRIPT_INFRASTRUCTURE_PROVIDER, "jquery");
configuration.add(SymbolConstants.BOOTSTRAP_ROOT, "context:mybootstrap");
}
/**
* This is a service definition, the service will be named "TimingFilter". The interface,
* RequestFilter, is used within the RequestHandler service pipeline, which is built from the
* RequestHandler service configuration. Tapestry IoC is responsible for passing in an
* appropriate Logger instance. Requests for static resources are handled at a higher level, so
* this filter will only be invoked for Tapestry related requests.
*
*
* Service builder methods are useful when the implementation is inline as an inner class
* (as here) or require some other kind of special initialization. In most cases,
* use the static bind() method instead.
*
*
* If this method was named "build", then the service id would be taken from the
* service interface and would be "RequestFilter". Since Tapestry already defines
* a service named "RequestFilter" we use an explicit service id that we can reference
* inside the contribution method.
*/
public RequestFilter buildTimingFilter(final Logger log) {
return new RequestFilter() {
public boolean service(Request request, Response response, RequestHandler handler)
throws IOException {
long startTime = System.currentTimeMillis();
try {
// The responsibility of a filter is to invoke the corresponding method
// in the handler. When you chain multiple filters together, each filter
// received a handler that is a bridge to the next filter.
return handler.service(request, response);
} finally {
long elapsed = System.currentTimeMillis() - startTime;
log.info("Request time: {} ms", elapsed);
}
}
};
}
/**
* This is a contribution to the RequestHandler service configuration. This is how we extend
* Tapestry using the timing filter. A common use for this kind of filter is transaction
* management or security. The @Local annotation selects the desired service by type, but only
* from the same module. Without @Local, there would be an error due to the other service(s)
* that implement RequestFilter (defined in other modules).
*/
@Contribute(RequestHandler.class)
public void addTimingFilter(OrderedConfiguration<RequestFilter> configuration, @Local RequestFilter filter) {
// Each contribution to an ordered configuration has a name, When necessary, you may
// set constraints to precisely control the invocation order of the contributed filter
// within the pipeline.
configuration.add("Timing", filter);
}
}

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package com.baeldung.tapestry.services;
import org.apache.tapestry5.SymbolConstants;
import org.apache.tapestry5.ioc.MappedConfiguration;
/**
* This module is automatically included as part of the Tapestry IoC Registry if <em>tapestry.execution-mode</em>
* includes <code>development</code>.
*/
public class DevelopmentModule {
public static void contributeApplicationDefaults(
MappedConfiguration<String, Object> configuration) {
// The factory default is true but during the early stages of an application
// overriding to false is a good idea. In addition, this is often overridden
// on the command line as -Dtapestry.production-mode=false
configuration.add(SymbolConstants.PRODUCTION_MODE, false);
// The application version number is incorprated into URLs for some
// assets. Web browsers will cache assets because of the far future expires
// header. If existing assets are changed, the version number should also
// change, to force the browser to download new versions.
configuration.add(SymbolConstants.APPLICATION_VERSION, "0.0.1-SNAPSHOT-DEV");
}
}

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package com.baeldung.tapestry.services;
import org.apache.tapestry5.SymbolConstants;
import org.apache.tapestry5.ioc.MappedConfiguration;
import org.apache.tapestry5.ioc.ServiceBinder;
/**
* This module is automatically included as part of the Tapestry IoC Registry if <em>tapestry.execution-mode</em>
* includes <code>qa</code> ("quality assurance").
*/
public class QaModule
{
public static void bind(ServiceBinder binder)
{
// Bind any services needed by the QA team to produce their reports
// binder.bind(MyServiceMonitorInterface.class, MyServiceMonitorImpl.class);
}
public static void contributeApplicationDefaults(
MappedConfiguration<String, Object> configuration)
{
// The factory default is true but during the early stages of an application
// overriding to false is a good idea. In addition, this is often overridden
// on the command line as -Dtapestry.production-mode=false
configuration.add(SymbolConstants.PRODUCTION_MODE, false);
// The application version number is incorprated into URLs for some
// assets. Web browsers will cache assets because of the far future expires
// header. If existing assets are changed, the version number should also
// change, to force the browser to download new versions.
configuration.add(SymbolConstants.APPLICATION_VERSION, "0.0.1-SNAPSHOT-QA");
}
}

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<html xmlns:t="http://tapestry.apache.org/schema/tapestry_5_4.xsd">
<head>
<title>${title}</title>
</head>
<body>
<div class="container">
<div class="row">
<div class="span12">
<t:alerts/>
</div>
</div>
</div>
<div class="container">
<t:body />
<hr />
<footer>
<p>&copy; Your Company</p>
</footer>
</div>
</body>
</html>

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<configuration>
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<layout class="ch.qos.logback.classic.PatternLayout">
<Pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</Pattern>
</layout>
</appender>
<logger name="com.baeldung.tapestry" level="TRACE"/>
<root level="info">
<appender-ref ref="STDOUT"/>
</root>
</configuration>

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<html t:type="layout" title="Not found apache-tapestry"
xmlns:t="http://tapestry.apache.org/schema/tapestry_5_4.xsd"
xmlns:p="tapestry:parameter">
<div class="row">
<div class="span12">
<h1>Requested page not found!</h1>
</div>
</div>
</html>

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introMsg=Welcome to the Apache Tapestry Tutorial

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<html t:type="layout" title="apache-tapestry Home" xmlns:t="http://tapestry.apache.org/schema/tapestry_5_4.xsd">
<h1>Home! ${appName}</h1>
<h2>${message:introMsg}</h2>
<h3>${currentTime}</h3>
<p><t:eventlink event="callAjax" zone="ajaxZone" class="btn btn-default">Call Ajax</t:eventlink></p>
<t:zone t:id="ajaxZone" class="span4"></t:zone>
<t:block t:id="ajaxBlock">
<hr/>
<h2>Rendered through Ajax</h2>
<p>The current time is: <strong>${currentTime}</strong></p>
</t:block>
</html>

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greeting=Welcome to Tapestry 5! We hope that this project template will get you going in style.

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<html t:type="layout" title="apache-tapestry Index"
xmlns:t="http://tapestry.apache.org/schema/tapestry_5_4.xsd"
>
<!-- Most of the page content, including <head>, <body>, etc. tags, comes from Layout.tml -->
<!-- Main hero unit for a primary marketing message or call to action -->
<div class="hero-unit">
<p>
<img src="${asset:context:images/tapestry.png}"
alt="${message:greeting}" title="${message:greeting}"/>
</p>
<h3>${message:greeting}</h3>
<p>The current time is: <strong>${currentTime}</strong></p>
<p>
This is a template for a simple marketing or informational website. It includes a large callout called
the hero unit and three supporting pieces of content. Use it as a starting point to create something
more unique.
</p>
<p><t:actionlink t:id="learnmore" class="btn btn-primary btn-large">Learn more &raquo;</t:actionlink></p>
</div>
<!-- Example row of columns -->
<div class="row">
<div class="span4">
<h2>Normal link</h2>
<p>Clink the bottom link and the page refresh with event <code>complete</code></p>
<p><t:eventlink event="complete" class="btn btn-default">Complete&raquo;</t:eventlink></p>
</div>
<t:zone t:id="middlezone" class="span4">
</t:zone>
<div class="span4">
<h2>Ajax link</h2>
<p>Click the bottom link to update just the middle column with Ajax call with event <code>ajax</code></p>
<p><t:eventlink event="ajax" zone="middlezone" class="btn btn-default">Ajax&raquo;</t:eventlink></p>
</div>
</div>
<t:block t:id="block">
<h2>Ajax updated</h2>
<p>I'v been updated through AJAX call</p>
<p>The current time is: <strong>${currentTime}</strong></p>
</t:block>
</html>

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<html t:type="layout" title="apache-tapestry com.example"
xmlns:t="http://tapestry.apache.org/schema/tapestry_5_3.xsd"
xmlns:p="tapestry:parameter">
<div class="row">
<div class="span4 offset3">
<t:form t:id="login">
<h2>Please sign in</h2>
<t:textfield t:id="email" class="input-block-level" placeholder="Email address"/>
<t:passwordfield t:id="password" class="input-block-level" placeholder="Password"/>
<t:submit class="btn btn-large btn-primary" value="Sign in"/>
</t:form>
</div>
</div>
</html>

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# Default to info level output; this is very handy if you eventually use Hibernate as well.
log4j.rootCategory=info, A1
# A1 is set to be a ConsoleAppender.
log4j.appender.A1=org.apache.log4j.ConsoleAppender
# A1 uses PatternLayout.
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=[%p] %c{2} %m%n
# Service category names are the name of the defining module class
# and then the service id.
log4j.category.com.baeldung.tapestry.services.AppModule.TimingFilter=info
# Outputs a list of pages, components and mixins at startup.
log4j.category.org.apache.tapestry5.modules.TapestryModule.ComponentClassResolver=info
# Outputs startup statistics; elapsed time to setup and initialize the registry, a list of
# available services, and a launch banner that includes the Tapestry version number.
log4j.category.org.apache.tapestry5.TapestryFilter=info
# Turning on debug mode for a page's or component's transformer logger
# will show all of the code changes that occur when the
# class is loaded.
# log4j.category.tapestry.transformer.com.baeldung.tapestry.pages.Index=debug
# Turning on debug mode for a component's events logger will show all the events triggered on the
# component, and which component methods are invoked as a result.
# log4j.category.tapestry.events.com.baeldung.tapestry.pages.Index=debug
# Turning on trace mode for a page's render logger provides extended information about every step
# in rendering (this is not generally helpful). Turning on debug mode will add a one-line
# summary that includes the elapsed render time, which can be useful in tracking down
# performance issues.
# log4j.category.tapestry.render.com.baeldung.tapestry.pages.Index=debug
# Turn on some verbose debugging about everything in the application. This is nice initially,
# while getting everything set up. You'll probably want to remove this once you are
# up and running, replacing it with more selective debugging output.
log4j.category.com.baeldung.tapestry=debug

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# This is where global application properties go.
# You can also have individual message catalogs for each page and each
# component that override these defaults.
# The name of this file is based on the <filter-name> element in web.

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<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
version="2.4">
<display-name>apache-tapestry Tapestry 5 Application</display-name>
<context-param>
<!--
The only significant configuration for Tapestry 5, this informs Tapestry
of where to look for pages, components and mixins.
-->
<param-name>tapestry.app-package</param-name>
<param-value>com.baeldung.tapestry</param-value>
</context-param>
<!--
Specify some additional Modules for two different execution
modes: development and qa.
Remember that the default execution mode is production
-->
<context-param>
<param-name>tapestry.development-modules</param-name>
<param-value>
com.baeldung.tapestry.services.DevelopmentModule
</param-value>
</context-param>
<context-param>
<param-name>tapestry.qa-modules</param-name>
<param-value>
com.baeldung.tapestry.services.QaModule
</param-value>
</context-param>
<!-- Filter configuration -->
<filter>
<filter-name>app</filter-name>
<filter-class>org.apache.tapestry5.TapestryFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>app</filter-name>
<url-pattern>/*</url-pattern>
<dispatcher>REQUEST</dispatcher>
<dispatcher>ERROR</dispatcher>
</filter-mapping>
<error-page>
<error-code>404</error-code>
<location>/error404</location>
</error-page>
</web-app>

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