vavr refactor (#1871)

* vavr refactor

* small fix

javaslang/README.md

@@ -1,5 +0,0 @@
-### Relevant Articles:
-- [Introduction to Javaslang](http://www.baeldung.com/javaslang)
-- [Guide to Try in Javaslang](http://www.baeldung.com/javaslang-try)
-- [Guide to Pattern Matching in Javaslang](http://www.baeldung.com/javaslang-pattern-matching)
-- [Property Testing Example With Javaslang](http://www.baeldung.com/javaslang-property-testing)

javaslang/src/main/java/com/baeldung/javaslang/exception/handling/JavaslangTry.java

@@ -1,18 +0,0 @@
-package com.baeldung.javaslang.exception.handling;
-
-
-import com.baeldung.javaslang.exception.handling.client.HttpClient;
-import com.baeldung.javaslang.exception.handling.client.Response;
-import javaslang.control.Try;
-
-public class JavaslangTry {
-    private final HttpClient httpClient;
-
-    public JavaslangTry(HttpClient httpClient) {
-        this.httpClient = httpClient;
-    }
-
-    public Try<Response> getResponse() {
-        return Try.of(httpClient::call);
-    }
-}

vavr/README.md

@@ -0,0 +1,5 @@
+### Relevant Articles:
+- [Introduction to Vavr](http://www.baeldung.com/javaslang)
+- [Guide to Try in Vavr](http://www.baeldung.com/javaslang-try)
+- [Guide to Pattern Matching in Vavr](http://www.baeldung.com/javaslang-pattern-matching)
+- [Property Testing Example With Vavr](http://www.baeldung.com/javaslang-property-testing)

vavr/pom.xml

@@ -2,9 +2,9 @@
     xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.baeldung</groupId>
-    <artifactId>javaslang</artifactId>
+    <artifactId>vavr</artifactId>
     <version>1.0</version>
-    <name>javaslang</name>
+    <name>vavr</name>
 	
 	<parent>
         <groupId>com.baeldung</groupId>
@@ -14,19 +14,21 @@
 
     <dependencies>
         <dependency>
-            <groupId>io.javaslang</groupId>
+            <groupId>io.vavr</groupId>
-            <artifactId>javaslang</artifactId>
+            <artifactId>vavr-test</artifactId>
-            <version>2.1.0-alpha</version>
+            <version>${vavr.version}</version>
         </dependency>
+
         <dependency>
-            <groupId>io.javaslang</groupId>
+            <groupId>junit</groupId>
-            <artifactId>javaslang-test</artifactId>
+            <artifactId>junit</artifactId>
-            <version>${javaslang.test.version}</version>
+            <version>${junit.version}</version>
         </dependency>
     </dependencies>
 
     <properties>
-        <javaslang.test.version>2.0.5</javaslang.test.version>
+        <vavr.version>0.9.0</vavr.version>
+        <junit.version>4.12</junit.version>
     </properties>
 
 </project>

vavr/src/main/java/com/baeldung/vavr/Person.java

@@ -1,4 +1,4 @@
-package com.baeldung.javaslang;
+package com.baeldung.vavr;
 
 public class Person {
     private String name;

vavr/src/main/java/com/baeldung/vavr/PersonValidator.java

@@ -1,13 +1,13 @@
-package com.baeldung.javaslang;
+package com.baeldung.vavr;
 
-import javaslang.collection.List;
+import io.vavr.collection.Seq;
-import javaslang.control.Validation;
+import io.vavr.control.Validation;
 
 class PersonValidator {
     String NAME_ERR = "Invalid characters in name: ";
     String AGE_ERR = "Age must be at least 0";
 
-    public Validation<List<String>, Person> validatePerson(String name, int age) {
+    public Validation<Seq<String>, Person> validatePerson(String name, int age) {
         return Validation.combine(validateName(name), validateAge(age)).ap(Person::new);
     }
 

vavr/src/main/java/com/baeldung/vavr/exception/handling/JavaTryCatch.java

@@ -1,8 +1,8 @@
-package com.baeldung.javaslang.exception.handling;
+package com.baeldung.vavr.exception.handling;
 
-import com.baeldung.javaslang.exception.handling.client.ClientException;
+import com.baeldung.vavr.exception.handling.client.ClientException;
-import com.baeldung.javaslang.exception.handling.client.HttpClient;
+import com.baeldung.vavr.exception.handling.client.HttpClient;
-import com.baeldung.javaslang.exception.handling.client.Response;
+import com.baeldung.vavr.exception.handling.client.Response;
 
 public class JavaTryCatch {
     private HttpClient httpClient;

vavr/src/main/java/com/baeldung/vavr/exception/handling/VavrTry.java

@@ -0,0 +1,18 @@
+package com.baeldung.vavr.exception.handling;
+
+
+import com.baeldung.vavr.exception.handling.client.HttpClient;
+import com.baeldung.vavr.exception.handling.client.Response;
+import io.vavr.control.Try;
+
+public class VavrTry {
+    private final HttpClient httpClient;
+
+    public VavrTry(HttpClient httpClient) {
+        this.httpClient = httpClient;
+    }
+
+    public Try<Response> getResponse() {
+        return Try.of(httpClient::call);
+    }
+}

vavr/src/main/java/com/baeldung/vavr/exception/handling/client/ClientException.java

@@ -1,4 +1,4 @@
-package com.baeldung.javaslang.exception.handling.client;
+package com.baeldung.vavr.exception.handling.client;
 
 
 public class ClientException extends Exception {

vavr/src/main/java/com/baeldung/vavr/exception/handling/client/HttpClient.java

@@ -1,4 +1,4 @@
-package com.baeldung.javaslang.exception.handling.client;
+package com.baeldung.vavr.exception.handling.client;
 
 
 public interface HttpClient {

vavr/src/main/java/com/baeldung/vavr/exception/handling/client/Response.java

@@ -1,4 +1,4 @@
-package com.baeldung.javaslang.exception.handling.client;
+package com.baeldung.vavr.exception.handling.client;
 
 public class Response {
     public final String id;

vavr/src/test/java/com/baeldung/vavr/PatternMatchingUnitTest.java

@@ -1,19 +1,17 @@
-package com.baeldung.javaslang;
+package com.baeldung.vavr;
 
-import static javaslang.API.$;
+import static io.vavr.API.$;
-import static javaslang.API.Case;
+import static io.vavr.API.Case;
-import static javaslang.API.Match;
+import static io.vavr.API.Match;
-import static javaslang.API.run;
+import static io.vavr.API.run;
-import static javaslang.Predicates.*;
+import static io.vavr.Predicates.*;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
-import java.util.Optional;
-
 import org.junit.Test;
 
-import javaslang.MatchError;
+import io.vavr.MatchError;
-import javaslang.control.Option;
+import io.vavr.control.Option;
 
 public class PatternMatchingUnitTest {
     @Test
@@ -41,63 +39,63 @@ public class PatternMatchingUnitTest {
     @Test
     public void whenMatchWorksWithPredicate_thenCorrect() {
         int i = 3;
-        String s = Match(i).of(Case(is(1), "one"), Case(is(2), "two"), Case(is(3), "three"), Case($(), "?"));
+        String s = Match(i).of(Case($(is(1)), "one"), Case($(is(2)), "two"), Case($(is(3)), "three"), Case($(), "?"));
         assertEquals("three", s);
     }
 
     @Test
     public void givenInput_whenMatchesClass_thenCorrect() {
         Object obj = 5;
-        String s = Match(obj).of(Case(instanceOf(String.class), "string matched"), Case($(), "not string"));
+        String s = Match(obj).of(Case($(instanceOf(String.class)), "string matched"), Case($(), "not string"));
         assertEquals("not string", s);
     }
 
     @Test
     public void givenInput_whenMatchesNull_thenCorrect() {
         Object obj = 5;
-        String s = Match(obj).of(Case(isNull(), "no value"), Case(isNotNull(), "value found"));
+        String s = Match(obj).of(Case($(isNull()), "no value"), Case($(isNotNull()), "value found"));
         assertEquals("value found", s);
     }
 
     @Test
     public void givenInput_whenContainsWorks_thenCorrect() {
         int i = 5;
-        String s = Match(i).of(Case(isIn(2, 4, 6, 8), "Even Single Digit"), Case(isIn(1, 3, 5, 7, 9), "Odd Single Digit"), Case($(), "Out of range"));
+        String s = Match(i).of(Case($(isIn(2, 4, 6, 8)), "Even Single Digit"), Case($(isIn(1, 3, 5, 7, 9)), "Odd Single Digit"), Case($(), "Out of range"));
         assertEquals("Odd Single Digit", s);
     }
 
     @Test
     public void givenInput_whenMatchAllWorks_thenCorrect() {
         Integer i = null;
-        String s = Match(i).of(Case(allOf(isNotNull(), isIn(1, 2, 3, null)), "Number found"), Case($(), "Not found"));
+        String s = Match(i).of(Case($(allOf(isNotNull(), isIn(1, 2, 3, null))), "Number found"), Case($(), "Not found"));
         assertEquals("Not found", s);
     }
 
     @Test
     public void givenInput_whenMatchesAnyOfWorks_thenCorrect() {
         Integer year = 1990;
-        String s = Match(year).of(Case(anyOf(isIn(1990, 1991, 1992), is(1986)), "Age match"), Case($(), "No age match"));
+        String s = Match(year).of(Case($(anyOf(isIn(1990, 1991, 1992), is(1986))), "Age match"), Case($(), "No age match"));
         assertEquals("Age match", s);
     }
 
     @Test
     public void givenInput_whenMatchesNoneOfWorks_thenCorrect() {
         Integer year = 1990;
-        String s = Match(year).of(Case(noneOf(isIn(1990, 1991, 1992), is(1986)), "Age match"), Case($(), "No age match"));
+        String s = Match(year).of(Case($(noneOf(isIn(1990, 1991, 1992), is(1986))), "Age match"), Case($(), "No age match"));
         assertEquals("No age match", s);
     }
 
     @Test
     public void whenMatchWorksWithPredicate_thenCorrect2() {
         int i = 5;
-        String s = Match(i).of(Case(isIn(2, 4, 6, 8), "Even Single Digit"), Case(isIn(1, 3, 5, 7, 9), "Odd Single Digit"), Case($(), "Out of range"));
+        String s = Match(i).of(Case($(isIn(2, 4, 6, 8)), "Even Single Digit"), Case($(isIn(1, 3, 5, 7, 9)), "Odd Single Digit"), Case($(), "Out of range"));
         assertEquals("Odd Single Digit", s);
     }
 
     @Test
     public void whenMatchCreatesSideEffects_thenCorrect() {
         int i = 4;
-        Match(i).of(Case(isIn(2, 4, 6, 8), o -> run(this::displayEven)), Case(isIn(1, 3, 5, 7, 9), o -> run(this::displayOdd)), Case($(), o -> run(() -> {
+        Match(i).of(Case($(isIn(2, 4, 6, 8)), o -> run(this::displayEven)), Case($(isIn(1, 3, 5, 7, 9)), o -> run(this::displayOdd)), Case($(), o -> run(() -> {
             throw new IllegalArgumentException(String.valueOf(i));
         })));
     }

vavr/src/test/java/com/baeldung/vavr/PropertyBasedLongRunningUnitTest.java

@@ -1,15 +1,15 @@
-package com.baeldung.javaslang;
+package com.baeldung.vavr;
 
-import javaslang.CheckedFunction1;
+import io.vavr.CheckedFunction1;
-import javaslang.collection.Stream;
+import io.vavr.collection.Stream;
-import javaslang.test.Arbitrary;
+import io.vavr.test.Arbitrary;
-import javaslang.test.CheckResult;
+import io.vavr.test.CheckResult;
-import javaslang.test.Property;
+import io.vavr.test.Property;
 import org.junit.Test;
 
 import java.util.function.Predicate;
 
-import static javaslang.API.*;
+import static io.vavr.API.*;
 
 public class PropertyBasedLongRunningUnitTest {
 

vavr/src/test/java/com/baeldung/vavr/VavrUnitTest.java

@@ -1,30 +1,35 @@
-package com.baeldung.javaslang;
+package com.baeldung.vavr;
 
-import javaslang.Function0;
+import io.vavr.Function0;
-import javaslang.Function1;
+import io.vavr.Function1;
-import javaslang.Function2;
+import io.vavr.Function2;
-import javaslang.Function5;
+import io.vavr.Function5;
-import javaslang.Lazy;
+import io.vavr.Lazy;
-import javaslang.*;
+import io.vavr.*;
-import javaslang.collection.List;
+import io.vavr.collection.List;
-import javaslang.control.Option;
+import io.vavr.collection.Seq;
-import javaslang.control.Try;
+import io.vavr.control.Option;
-import javaslang.control.Validation;
+import io.vavr.control.Try;
+import io.vavr.control.Validation;
 import org.junit.Test;
 
+import com.baeldung.vavr.Person;
+import com.baeldung.vavr.PersonValidator;
+
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.function.BiFunction;
 import java.util.function.Function;
 import java.util.stream.IntStream;
 
-import static javaslang.API.*;
+import static io.vavr.API.*;
 import static org.junit.Assert.*;
 
-public class JavaSlangUnitTest {
+public class VavrUnitTest {
     @Test
     public void givenList_whenSorts_thenCorrect() {
-        List<Integer> sortedList = List.of(3, 2, 1).sorted();
+        List<Integer> sortedList = List.of(3, 2, 1)
+            .sorted();
     }
 
     /*
@@ -57,9 +62,9 @@ public class JavaSlangUnitTest {
     @Test
     public void givenTuple_whenMapsComponentWise_thenCorrect() {
         Tuple2<String, Integer> java8 = Tuple.of("Java", 8);
-        Tuple2<String, Integer> mapOfJava8 = java8.map(s -> s + "slang", i -> i / 2);
+        Tuple2<String, Integer> mapOfJava8 = java8.map(s -> s + "Vavr", i -> i / 2);
         int num = mapOfJava8._2();
-        assertEquals("Javaslang", mapOfJava8._1);
+        assertEquals("JavaVavr", mapOfJava8._1);
 
         assertEquals(4, num);
 
@@ -69,9 +74,9 @@ public class JavaSlangUnitTest {
     @Test
     public void givenTuple_whenMapsWithOneMapper_thenCorrect() {
         Tuple2<String, Integer> java8 = Tuple.of("Java", 8);
-        Tuple2<String, Integer> mapOfJava8 = java8.map((s, i) -> Tuple.of(s + "slang", i / 2));
+        Tuple2<String, Integer> mapOfJava8 = java8.map((s, i) -> Tuple.of(s + "Vavr", i / 2));
         int num = mapOfJava8._2();
-        assertEquals("Javaslang", mapOfJava8._1);
+        assertEquals("JavaVavr", mapOfJava8._1);
 
         assertEquals(4, num);
     }
@@ -80,8 +85,8 @@ public class JavaSlangUnitTest {
     @Test
     public void givenTuple_whenTransforms_thenCorrect() {
         Tuple2<String, Integer> java8 = Tuple.of("Java", 8);
-        String transformed = java8.apply((s, i) -> s + "slang " + i / 2);
+        String transformed = java8.apply((s, i) -> s + "Vavr " + i / 2);
-        assertEquals("Javaslang 4", transformed);
+        assertEquals("JavaVavr 4", transformed);
     }
 
     /*
@@ -102,14 +107,14 @@ public class JavaSlangUnitTest {
     }
 
     @Test
-    public void givenJavaslangFunction_whenWorks_thenCorrect() {
+    public void givenVavrFunction_whenWorks_thenCorrect() {
         Function1<Integer, Integer> square = (num) -> num * num;
         Integer result = square.apply(2);
         assertEquals(Integer.valueOf(4), result);
     }
 
     @Test
-    public void givenJavaslangBiFunction_whenWorks_thenCorrect() {
+    public void givenVavrBiFunction_whenWorks_thenCorrect() {
         Function2<Integer, Integer, Integer> sum = (num1, num2) -> num1 + num2;
         Integer result = sum.apply(5, 7);
         assertEquals(Integer.valueOf(12), result);
@@ -117,9 +122,10 @@ public class JavaSlangUnitTest {
 
     @Test
     public void whenCreatesFunction_thenCorrect0() {
-        Function0<String> getClazzName = () -> this.getClass().getName();
+        Function0<String> getClazzName = () -> this.getClass()
+            .getName();
         String clazzName = getClazzName.apply();
-        assertEquals("com.baeldung.javaslang.JavaSlangUnitTest", clazzName);
+        assertEquals("com.baeldung.vavr.VavrUnitTest", clazzName);
     }
 
     @Test
@@ -132,8 +138,8 @@ public class JavaSlangUnitTest {
     @Test
     public void whenCreatesFunction_thenCorrect5() {
         Function5<String, String, String, String, String, String> concat = (a, b, c, d, e) -> a + b + c + d + e;
-        String finalString = concat.apply("Hello ", "world", "! ", "Learn ", "Javaslang");
+        String finalString = concat.apply("Hello ", "world", "! ", "Learn ", "Vavr");
-        assertEquals("Hello world! Learn Javaslang", finalString);
+        assertEquals("Hello world! Learn Vavr", finalString);
     }
 
     @Test
@@ -147,7 +153,6 @@ public class JavaSlangUnitTest {
         return a + b;
     }
 
-
     /*
      * Values
      */
@@ -207,11 +212,11 @@ public class JavaSlangUnitTest {
         assertEquals(-1, errorSentinel);
     }
 
-//    @Test(expected = ArithmeticException.class)
+    // @Test(expected = ArithmeticException.class)
-//    public void givenBadCode_whenTryHandles_thenCorrect3() {
+    // public void givenBadCode_whenTryHandles_thenCorrect3() {
-//        Try<Integer> result = Try.of(() -> 1 / 0);
+    // Try<Integer> result = Try.of(() -> 1 / 0);
-//        result.getOrElseThrow(ArithmeticException::new);
+    // result.getOrElseThrow(ArithmeticException::new);
-//    }
+    // }
 
     // lazy
     @Test
@@ -230,8 +235,8 @@ public class JavaSlangUnitTest {
     @Test
     public void whenValidationWorks_thenCorrect() {
         PersonValidator personValidator = new PersonValidator();
-        Validation<List<String>, Person> valid = personValidator.validatePerson("John Doe", 30);
+        Validation<Seq<String>, Person> valid = personValidator.validatePerson("John Doe", 30);
-        Validation<List<String>, Person> invalid = personValidator.validatePerson("John? Doe!4", -1);
+        Validation<Seq<String>, Person> invalid = personValidator.validatePerson("John? Doe!4", -1);
 
         assertEquals("Valid(Person [name=John Doe, age=30])", valid.toString());
         assertEquals("Invalid(List(Invalid characters in name: ?!4, Age must be at least 0))", invalid.toString());
@@ -251,12 +256,13 @@ public class JavaSlangUnitTest {
     @Test
     public void whenSumsJava8List_thenCorrect() {
         // Arrays.asList(1, 2, 3).stream().reduce((i, j) -> i + j);
-        int sum = IntStream.of(1, 2, 3).sum();
+        int sum = IntStream.of(1, 2, 3)
+            .sum();
         assertEquals(6, sum);
     }
 
     @Test
-    public void whenCreatesJavaslangList_thenCorrect() {
+    public void whenCreatesVavrList_thenCorrect() {
         List<Integer> intList = List.of(1, 2, 3);
         assertEquals(3, intList.length());
         assertEquals(new Integer(1), intList.get(0));
@@ -265,8 +271,10 @@ public class JavaSlangUnitTest {
     }
 
     @Test
-    public void whenSumsJavaslangList_thenCorrect() {
+    public void whenSumsVavrList_thenCorrect() {
-        int sum = List.of(1, 2, 3).sum().intValue();
+        int sum = List.of(1, 2, 3)
+            .sum()
+            .intValue();
         assertEquals(6, sum);
     }
 
@@ -325,6 +333,4 @@ public class JavaSlangUnitTest {
         assertEquals("two", output);
     }
 
-
-
 }

vavr/src/test/java/com/baeldung/vavr/exception/handling/VavrTryUnitTest.java

@@ -1,22 +1,20 @@
-package com.baeldung.javaslang.exception.handling;
+package com.baeldung.vavr.exception.handling;
 
-import com.baeldung.javaslang.exception.handling.client.ClientException;
+import com.baeldung.vavr.exception.handling.client.ClientException;
-import com.baeldung.javaslang.exception.handling.client.HttpClient;
+import com.baeldung.vavr.exception.handling.client.HttpClient;
-import com.baeldung.javaslang.exception.handling.client.Response;
+import com.baeldung.vavr.exception.handling.client.Response;
-import javaslang.collection.Stream;
+import com.baeldung.vavr.exception.handling.VavrTry;
-import javaslang.control.Option;
+
-import javaslang.control.Try;
+import io.vavr.collection.Stream;
+import io.vavr.control.Option;
+import io.vavr.control.Try;
 import org.junit.Test;
 
-import java.util.function.Function;
+import static io.vavr.API.*;
-import java.util.stream.Collectors;
+import static io.vavr.Predicates.instanceOf;
-
-import static javaslang.API.Case;
-import static javaslang.API.Match;
-import static javaslang.Predicates.instanceOf;
 import static org.junit.Assert.*;
 
-public class JavaslangTryUnitTest {
+public class VavrTryUnitTest {
 
     @Test
     public void givenHttpClient_whenMakeACall_shouldReturnSuccess() {
@@ -26,7 +24,7 @@ public class JavaslangTryUnitTest {
         HttpClient httpClient = () -> new Response(id);
 
         //when
-        Try<Response> response = new JavaslangTry(httpClient).getResponse();
+        Try<Response> response = new VavrTry(httpClient).getResponse();
         Integer chainedResult = response
                 .map(this::actionThatTakesResponse)
                 .getOrElse(defaultChainedResult);
@@ -49,7 +47,7 @@ public class JavaslangTryUnitTest {
         };
 
         //when
-        Try<Response> response = new JavaslangTry(httpClient).getResponse();
+        Try<Response> response = new VavrTry(httpClient).getResponse();
         Integer chainedResult = response
                 .map(this::actionThatTakesResponse)
                 .getOrElse(defaultChainedResult);
@@ -71,9 +69,9 @@ public class JavaslangTryUnitTest {
         };
 
         //when
-        Try<Response> recovered = new JavaslangTry(httpClient).getResponse()
+        Try<Response> recovered = new VavrTry(httpClient).getResponse()
                 .recover(r -> Match(r).of(
-                        Case(instanceOf(ClientException.class), defaultResponse)
+                        Case($(instanceOf(ClientException.class)), defaultResponse)
                 ));
 
         //then
@@ -93,10 +91,10 @@ public class JavaslangTryUnitTest {
         };
 
         //when
-        Try<Response> recovered = new JavaslangTry(httpClient).getResponse()
+        Try<Response> recovered = new VavrTry(httpClient).getResponse()
                 .recover(r -> Match(r).of(
-                        Case(instanceOf(ClientException.class), defaultResponse),
+                        Case($(instanceOf(ClientException.class)), defaultResponse),
-                        Case(instanceOf(IllegalArgumentException.class), defaultResponse)
+                        Case($(instanceOf(IllegalArgumentException.class)), defaultResponse)
                 ));
 
         //then