[Java 11502] (#12625)
* [JAVA-11502] Added vavr-modules (parent) * [JAVA-11502] Added vavr(submodule) to vavr-modules(parent) * [JAVA-11502] Added vavr-2(submodule) to vavr-modules(parent) * [JAVA-11502] Added java-vavr-stream(submodule) to vavr-modules(parent) * [JAVA-11502] deleted modules that were moved + cleanup Co-authored-by: panagiotiskakos <panagiotis.kakos@libra-is.com> Co-authored-by: Dhawal Kapil <dhawalkapil@gmail.com>
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panos-kakos
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8
vavr-modules/vavr-2/README.md
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8
vavr-modules/vavr-2/README.md
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## Vavr
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This module contains articles about Vavr.
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### Relevant Articles:
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- [Introduction to Vavr’s Either](https://www.baeldung.com/vavr-either)
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- [Interoperability Between Java and Vavr](https://www.baeldung.com/java-vavr)
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- [[<-- prev]](/vavr)
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27
vavr-modules/vavr-2/pom.xml
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27
vavr-modules/vavr-2/pom.xml
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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<artifactId>vavr-2</artifactId>
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<name>vavr-2</name>
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<packaging>jar</packaging>
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<parent>
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<groupId>com.baeldung</groupId>
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<artifactId>vavr-modules</artifactId>
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<version>1.0.0-SNAPSHOT</version>
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</parent>
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<dependencies>
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<dependency>
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<groupId>io.vavr</groupId>
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<artifactId>vavr-test</artifactId>
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<version>${vavr.version}</version>
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</dependency>
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</dependencies>
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<properties>
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<vavr.version>0.9.1</vavr.version>
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</properties>
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</project>
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package com.baeldung.vavr.either;
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import java.util.HashMap;
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import java.util.Map;
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import io.vavr.control.Either;
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public class EitherDemo {
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public static Object[] computeWithoutEitherUsingArray(int marks) {
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Object[] results = new Object[2];
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if (marks < 85) {
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results[0] = "Marks not acceptable";
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} else {
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results[1] = marks;
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}
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return results;
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}
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public static Map<String, Object> computeWithoutEitherUsingMap(int marks) {
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Map<String, Object> results = new HashMap<>();
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if (marks < 85) {
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results.put("FAILURE", "Marks not acceptable");
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} else {
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results.put("SUCCESS", marks);
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}
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return results;
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}
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static Either<String, Integer> computeWithEither(int marks) {
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if (marks < 85) {
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return Either.left("Marks not acceptable");
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} else {
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return Either.right(marks);
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}
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}
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}
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package com.baeldung.vavr.either;
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import io.vavr.control.Either;
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import org.junit.Test;
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import static org.junit.Assert.assertEquals;
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public class EitherUnitTest {
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@Test
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public void givenMarks_whenPassNumber_thenExpectNumber() {
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Either<String, Integer> result = EitherDemo.computeWithEither(100);
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int marks = result.right()
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.getOrElseThrow(x -> new IllegalStateException());
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assertEquals(100, marks);
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}
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@Test
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public void givenMarks_whenFailNumber_thenExpectErrorMesssage() {
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Either<String, Integer> result = EitherDemo.computeWithEither(50);
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String error = result.left()
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.getOrNull();
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assertEquals("Marks not acceptable", error);
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}
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@Test
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public void givenPassMarks_whenModified_thenExpectNumber() {
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Either<String, Integer> result = EitherDemo.computeWithEither(90);
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int marks = result.right()
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.map(x -> x * 2)
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.get();
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assertEquals(180, marks);
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}
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}
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package com.baeldung.vavr.interoperability;
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import static org.junit.Assert.assertEquals;
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import static org.junit.Assert.assertTrue;
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import java.util.Arrays;
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import java.util.Optional;
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import org.junit.Test;
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import io.vavr.collection.HashMap;
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import io.vavr.collection.LinkedHashSet;
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import io.vavr.collection.List;
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import io.vavr.collection.Map;
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import io.vavr.collection.Set;
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import io.vavr.collection.Stream;
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public class CollectionsInteroperabilityUnitTest {
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@Test
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public void givenParams_whenVavrList_thenReturnJavaList() {
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List<String> vavrStringList = List.of("JAVA", "Javascript", "Scala");
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java.util.List<String> javaStringList = vavrStringList.toJavaList();
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assertTrue(javaStringList instanceof java.util.List);
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}
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@Test
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public void givenParams_whenVavrStream_thenReturnJavaStream() {
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Stream<String> vavrStream = Stream.of("JAVA", "Javascript", "Scala");
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java.util.stream.Stream<String> javaParallelStream = vavrStream.toJavaParallelStream();
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assertTrue(javaParallelStream instanceof java.util.stream.Stream);
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java.util.List<String> javaStringList = vavrStream.toJavaList();
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assertTrue(javaStringList instanceof java.util.List);
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}
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@Test
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public void givenParams_whenVavrMap_thenReturnJavaMap() {
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Map<String, String> vavrMap = HashMap.of("1", "a", "2", "b", "3", "c");
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java.util.Map<String, String> javaMap = vavrMap.toJavaMap();
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assertTrue(javaMap instanceof java.util.Map);
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}
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@Test
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public void givenParams_whenJavaList_thenReturnVavrListUsingOfAll() {
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java.util.List<String> javaList = Arrays.asList("Java", "Haskell", "Scala");
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List<String> vavrList = List.ofAll(javaList);
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assertTrue(vavrList instanceof io.vavr.collection.List);
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}
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@Test
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public void givenParams_whenJavaStream_thenReturnVavrListUsingOfAll() {
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java.util.stream.Stream<String> javaStream = Arrays.asList("Java", "Haskell", "Scala")
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.stream();
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Stream<String> vavrStream = Stream.ofAll(javaStream);
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assertTrue(vavrStream instanceof io.vavr.collection.Stream);
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}
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@Test(expected = UnsupportedOperationException.class)
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public void givenParams_whenVavrListConverted_thenException() {
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java.util.List<String> javaList = List.of("Java", "Haskell", "Scala")
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.asJava();
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javaList.add("Python");
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assertEquals(4, javaList.size());
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}
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@Test
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public void givenParams_whenVavrListConvertedToMutable_thenRetunMutableList() {
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java.util.List<String> javaList = List.of("Java", "Haskell", "Scala")
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.asJavaMutable();
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javaList.add("Python");
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assertEquals(4, javaList.size());
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}
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@Test
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public void givenParams_WhenVavarListConvertedToLinkedSet_thenReturnLinkedSet() {
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List<String> vavrList = List.of("Java", "Haskell", "Scala", "Java");
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Set<String> linkedSet = vavrList.toLinkedSet();
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assertEquals(3, linkedSet.size());
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assertTrue(linkedSet instanceof LinkedHashSet);
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}
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@Test
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public void givenParams_WhenVavrList_thenReturnJavaOptional() {
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List<String> vavrList = List.of("Java");
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Optional<String> optional = vavrList.toJavaOptional();
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assertEquals("Java", optional.get());
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}
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}
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