BAEL-2766 Added core-groovy-collections module

core-groovy-collections/README.md

@@ -0,0 +1,6 @@
+# Groovy
+
+## Relevant articles:
+
+- [Maps in Groovy](http://www.baeldung.com/)
+

core-groovy-collections/pom.xml

@@ -0,0 +1,131 @@
+<?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>core-groovy-collections</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <name>core-groovy-collections</name>
+    <packaging>jar</packaging>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.codehaus.groovy</groupId>
+            <artifactId>groovy</artifactId>
+            <version>${groovy.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.codehaus.groovy</groupId>
+            <artifactId>groovy-all</artifactId>
+            <version>${groovy-all.version}</version>
+            <type>pom</type>
+        </dependency>
+        <dependency>
+            <groupId>org.codehaus.groovy</groupId>
+            <artifactId>groovy-dateutil</artifactId>
+            <version>${groovy.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.codehaus.groovy</groupId>
+            <artifactId>groovy-sql</artifactId>
+            <version>${groovy-sql.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.platform</groupId>
+            <artifactId>junit-platform-runner</artifactId>
+            <version>${junit.platform.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.hsqldb</groupId>
+            <artifactId>hsqldb</artifactId>
+            <version>${hsqldb.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.spockframework</groupId>
+            <artifactId>spock-core</artifactId>
+            <version>${spock-core.version}</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.codehaus.gmavenplus</groupId>
+                <artifactId>gmavenplus-plugin</artifactId>
+                <version>${gmavenplus-plugin.version}</version>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>addSources</goal>
+                            <goal>addTestSources</goal>
+                            <goal>compile</goal>
+                            <goal>compileTests</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <artifactId>maven-failsafe-plugin</artifactId>
+                <version>${maven-failsafe-plugin.version}</version>
+                <dependencies>
+                    <dependency>
+                        <groupId>org.junit.platform</groupId>
+                        <artifactId>junit-platform-surefire-provider</artifactId>
+                        <version>${junit.platform.version}</version>
+                    </dependency>
+                </dependencies>
+                <executions>
+                    <execution>
+                        <id>junit5</id>
+                        <goals>
+                            <goal>integration-test</goal>
+                            <goal>verify</goal>
+                        </goals>
+                        <configuration>
+                            <includes>
+                                <include>**/*Test5.java</include>
+                            </includes>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <version>2.20.1</version>
+                <configuration>
+                <useFile>false</useFile>
+                <includes>
+                    <include>**/*Test.java</include>
+                    <include>**/*Spec.java</include>
+                </includes>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <repositories>
+        <repository>
+            <id>central</id>
+            <url>http://jcenter.bintray.com</url>
+        </repository>
+    </repositories>
+
+    <properties>
+        <junit.platform.version>1.0.0</junit.platform.version>
+        <groovy.version>2.5.6</groovy.version>
+        <groovy-all.version>2.5.6</groovy-all.version>
+        <groovy-sql.version>2.5.6</groovy-sql.version>
+        <hsqldb.version>2.4.0</hsqldb.version>
+        <spock-core.version>1.1-groovy-2.4</spock-core.version>
+        <gmavenplus-plugin.version>1.6</gmavenplus-plugin.version>
+    </properties>
+</project>
+

core-groovy-collections/src/test/groovy/com/baeldung/map/MapTest.groovy

@@ -0,0 +1,148 @@
+package com.baeldung.map;
+
+import static groovy.test.GroovyAssert.*
+import org.junit.Test
+
+class MapTest{
+
+    @Test
+    void createMap() {
+
+        def emptyMap = [:]
+        assertNotNull(emptyMap)
+
+        assertTrue(emptyMap instanceof java.util.LinkedHashMap)
+
+        def map = [name:"Jerry", age: 42, city: "New York"]
+        assertTrue(map.size() == 3)
+    }
+
+    @Test
+    void addItemsToMap() {
+
+        def map = [name:"Jerry"]
+
+        map["age"] = 42
+
+        map.city = "New York"
+
+        def hobbyLiteral = "hobby"
+        def hobbyMap = [(hobbyLiteral): "Singing"]
+        map.putAll(hobbyMap)
+
+        assertTrue(map == [name:"Jerry", age: 42, city: "New York", hobby:"Singing"])
+        assertTrue(hobbyMap.hobby == "Singing")
+        assertTrue(hobbyMap[hobbyLiteral] == "Singing")
+        
+        map.plus([1:20]) // returns new map
+
+        map << [2:30]
+
+    }
+
+    @Test
+    void getItemsFromMap() {
+
+        def map = [name:"Jerry", age: 42, city: "New York", hobby:"Singing"]
+
+        assertTrue(map["name"] == "Jerry")
+
+        assertTrue(map.name == "Jerry")
+
+        def propertyAge = "age"
+        assertTrue(map[propertyAge] == 42)
+    }
+
+    @Test
+    void removeItemsFromMap() {
+
+        def map = [1:20, a:30, 2:42, 4:34, ba:67, 6:39, 7:49]
+
+        def minusMap = map.minus([2:42, 4:34]);
+        assertTrue(minusMap == [1:20, a:30, ba:67, 6:39, 7:49])
+
+        minusMap.removeAll{it -> it.key instanceof String}
+        assertTrue( minusMap == [ 1:20, 6:39, 7:49])
+
+        minusMap.retainAll{it -> it.value %2 == 0}
+        assertTrue( minusMap == [1:20])
+    }
+
+    @Test
+    void iteratingOnMaps(){
+        def map = [name:"Jerry", age: 42, city: "New York", hobby:"Singing"]
+
+        map.each{ entry -> println "$entry.key: $entry.value" }
+
+        map.eachWithIndex{ entry, i -> println "$i $entry.key: $entry.value" }
+
+        map.eachWithIndex{ key, value, i -> println "$i $key: $value" }
+    }
+
+    @Test
+    void filteringAndSearchingMaps(){
+        def map = [name:"Jerry", age: 42, city: "New York", hobby:"Singing"]
+
+        assertTrue(map.find{ it.value == "New York"}.key == "city")
+
+        assertTrue(map.findAll{ it.value == "New York"} == [city : "New York"])
+
+        map.grep{it.value == "New York"}.each{ it -> assertTrue(it.key == "city" && it.value == "New York")}
+
+        assertTrue(map.every{it -> it.value instanceof String} == false)
+
+        assertTrue(map.any{it -> it.value instanceof String} == true)
+    }
+
+    @Test
+    void collect(){
+
+        def map = [1: [name:"Jerry", age: 42, city: "New York"],
+            2: [name:"Long", age: 25, city: "New York"],
+            3: [name:"Dustin", age: 29, city: "New York"],
+            4: [name:"Dustin", age: 34, city: "New York"]]
+
+        def names = map.collect{entry -> entry.value.name} // returns only list
+        assertTrue(names == ["Jerry", "Long", "Dustin", "Dustin"])
+
+        def uniqueNames = map.collect([] as HashSet){entry -> entry.value.name}
+        assertTrue(uniqueNames == ["Jerry", "Long", "Dustin"] as Set)
+
+        def idNames = map.collectEntries{key, value -> [key, value.name]}
+        assertTrue(idNames == [1:"Jerry", 2: "Long", 3:"Dustin", 4: "Dustin"])
+
+        def below30Names = map.findAll{it.value.age < 30}.collect{key, value -> value.name}
+        assertTrue(below30Names == ["Long", "Dustin"])
+
+
+    }
+
+    @Test
+    void group(){
+        def map = [1:20, 2: 40, 3: 11, 4: 93]
+
+        def subMap = map.groupBy{it.value % 2}
+        println subMap
+        assertTrue(subMap == [0:[1:20, 2:40 ], 1:[3:11, 4:93]])
+
+        def keySubMap = map.subMap([1, 2])
+        assertTrue(keySubMap == [1:20, 2:40])
+
+    }
+
+    @Test
+    void sorting(){
+        def map = [ab:20, a: 40, cb: 11, ba: 93]
+
+        def naturallyOrderedMap = map.sort()
+        assertTrue([a:40, ab:20, ba:93, cb:11] == naturallyOrderedMap)
+
+        def compSortedMap = map.sort({ k1, k2 -> k1 <=> k2 } as Comparator)
+        assertTrue([a:40, ab:20, ba:93, cb:11] == compSortedMap)
+
+        def cloSortedMap = map.sort({ it1, it2 -> it1.value <=> it1.value })
+        assertTrue([cb:11, ab:20, a:40, ba:93] == cloSortedMap)
+
+    }
+
+}

pom.xml

@@ -377,6 +377,7 @@
                 <module>checker-plugin</module>
                 <module>core-groovy</module>
                 <module>core-groovy-2</module>
+		<module>core-groovy-collections</module>
                 <!-- <module>core-java-10</module> --> <!-- We haven't upgraded to java 10. Fixing in BAEL-10841 -->
                 <!-- <module>core-java-11</module> --> <!-- We haven't upgraded to java 11. Fixing in BAEL-10841 -->
                 <!-- <module>core-java-12</module> --> <!-- We haven't upgraded to java 12. Fixing in BAEL-10841 -->
@@ -1051,6 +1052,7 @@
                 <module>checker-plugin</module>
                 <module>core-groovy</module>
                 <module>core-groovy-2</module>
+                <module>core-groovy-collections</module>
                 <!-- <module>core-java-10</module> --> <!-- We haven't upgraded to java 10. Fixing in BAEL-10841 -->
                 <!-- <module>core-java-11</module> --> <!-- We haven't upgraded to java 11. Fixing in BAEL-10841 -->
                 <module>core-java-8</module>