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Merge pull request #548 from eugenp/grzegorz-immutables

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Add examples for "Introduction to Immutables" article
This commit is contained in:
Alex Theedom 2016-07-30 17:25:50 +01:00 committed by GitHub
commit 05ed3d9d95
11 changed files with 196 additions and 0 deletions
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50
immutables/pom.xml Normal file
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<?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>com.baeldung</groupId>
<artifactId>immutables</artifactId>
<version>1.0.0-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>org.immutables</groupId>
<artifactId>value</artifactId>
<version>2.2.10</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.assertj</groupId>
<artifactId>assertj-core</artifactId>
<version>3.5.2</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.mutabilitydetector</groupId>
<artifactId>MutabilityDetector</artifactId>
<version>0.9.5</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.3</version>
<configuration>
<source>1.8</source>
<target>1.8</target>
</configuration>
</plugin>
</plugins>
</build>
</project>

9
immutables/src/main/java/com/baeldung/immutable/Address.java Normal file
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package com.baeldung.immutable;
import org.immutables.value.Value;
@Value.Immutable
public interface Address {
String getStreetName();
Integer getNumber();
}

9
immutables/src/main/java/com/baeldung/immutable/Person.java Normal file
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package com.baeldung.immutable;
import org.immutables.value.Value;
@Value.Immutable
public abstract class Person {
abstract String getName();
abstract Integer getAge();
}

13
immutables/src/main/java/com/baeldung/immutable/auxiliary/Person.java Normal file
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package com.baeldung.immutable.auxiliary;
import org.immutables.value.Value;
@Value.Immutable
public abstract class Person {
abstract String getName();
abstract Integer getAge();
@Value.Auxiliary
abstract String getAuxiliaryField();
}

14
immutables/src/main/java/com/baeldung/immutable/default_/Person.java Normal file
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package com.baeldung.immutable.default_;
import org.immutables.value.Value;
@Value.Immutable(prehash = true)
public abstract class Person {
abstract String getName();
@Value.Default
Integer getAge() {
return 42;
}
}

14
immutables/src/main/java/com/baeldung/immutable/parameter/Person.java Normal file
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package com.baeldung.immutable.parameter;
import org.immutables.value.Value;
@Value.Immutable
public abstract class Person {
@Value.Parameter
abstract String getName();
@Value.Parameter
abstract Integer getAge();
}

9
immutables/src/main/java/com/baeldung/immutable/prehash/Person.java Normal file
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package com.baeldung.immutable.prehash;
import org.immutables.value.Value;
@Value.Immutable(prehash = true)
public abstract class Person {
abstract String getName();
abstract Integer getAge();
}

27
immutables/src/test/java/com/baeldung/immutable/ImmutablePersonTest.java Normal file
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package com.baeldung.immutable;
import org.junit.Test;
import static org.assertj.core.api.Assertions.assertThat;
import static org.mutabilitydetector.unittesting.MutabilityAssert.assertImmutable;
public class ImmutablePersonTest {
@Test
public void whenModifying_shouldCreateNewInstance() throws Exception {
final ImmutablePerson john = ImmutablePerson.builder()
.age(42)
.name("John")
.build();
final ImmutablePerson john43 = john.withAge(43);
assertThat(john)
.isNotSameAs(john43);
assertThat(john.getAge())
.isEqualTo(42);
assertImmutable(ImmutablePerson.class);
}
}

33
immutables/src/test/java/com/baeldung/immutable/auxiliary/ImmutablePersonAuxiliaryTest.java Normal file
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package com.baeldung.immutable.auxiliary;
import org.junit.Test;
import static org.assertj.core.api.Assertions.assertThat;
public class ImmutablePersonAuxiliaryTest {
@Test
public void whenComparing_shouldIgnore() throws Exception {
final ImmutablePerson john1 = ImmutablePerson.builder()
.name("John")
.age(42)
.auxiliaryField("Value1")
.build();
final ImmutablePerson john2 = ImmutablePerson.builder()
.name("John")
.age(42)
.auxiliaryField("Value2")
.build();
assertThat(john1.equals(john2))
.isTrue();
assertThat(john1.toString())
.isEqualTo(john2.toString());
assertThat(john1.hashCode())
.isEqualTo(john2.hashCode());
}
}

17
immutables/src/test/java/com/baeldung/immutable/default_/ImmutablePersonDefaultTest.java Normal file
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package com.baeldung.immutable.default_;
import org.junit.Test;
import static org.assertj.core.api.Assertions.assertThat;
public class ImmutablePersonDefaultTest {
@Test
public void whenInstantiating_shouldUseDefaultValue() throws Exception {
final ImmutablePerson john = ImmutablePerson.builder().name("John").build();
assertThat(john.getAge()).isEqualTo(42);
}
}

1
pom.xml
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<module>guava19</module>
<module>handling-spring-static-resources</module>
<module>httpclient</module>
<module>immutables</module>
<module>jackson</module>
<module>javaxval</module>
<module>jjwt</module>