feat(compat): Provide JDK11 compatibilty through Multi-Release JAR

build.gradle

@@ -14,15 +14,18 @@ plugins {
   id('io.github.joselion.pretty-jupiter') version '3.0.1'
   id('io.github.joselion.strict-null-check') version '3.0.0'
   id('io.github.gradle-nexus.publish-plugin') version '2.0.0-rc-1'
+  id('me.champeau.mrjar') version '0.1.1'
   id('name.remal.sonarlint') version '3.3.8'
 }
 
 group = 'io.github.joselion'
 
+multiRelease {
+  targetVersions(11, 17, 20)
+}
+
 java {
-  sourceCompatibility = JavaLanguageVersion.of(17)
   toolchain {
-    languageVersion = JavaLanguageVersion.of(20)
     vendor = JvmVendorSpec.ORACLE
   }
   withJavadocJar()
@@ -101,19 +104,23 @@ dependencies {
       because('version 9.0.75 has a security vulnerability')
     }
   }
-
-  testImplementation('org.assertj:assertj-core:3.24.2')
-  testImplementation('org.mockito:mockito-core:5.5.0')
 }
 
 testing {
   suites {
-    test {
+    configureEach {
       useJUnitJupiter('5.10.0')
+      dependencies {
+        implementation('org.assertj:assertj-core:3.24.2')
+        implementation('org.mockito:mockito-core:5.5.0')
+      }
     }
   }
 }
 
+java17Test.useJUnitPlatform()
+java20Test.useJUnitPlatform()
+
 prettyJupiter {
   duration.threshold = 150
 }

buildscript-gradle.lockfile

@@ -8,6 +8,8 @@ io.github.joselion.strict-null-check:io.github.joselion.strict-null-check.gradle
 io.github.joselion:maybe:3.2.0=classpath
 io.github.joselion:pretty-jupiter:3.0.1=classpath
 io.github.joselion:strict-null-check:3.0.0=classpath
+me.champeau.gradle.mrjar:plugin:0.1.1=classpath
+me.champeau.mrjar:me.champeau.mrjar.gradle.plugin:0.1.1=classpath
 name.remal.gradle-plugins.sonarlint:sonarlint:3.3.8=classpath
 name.remal.sonarlint:name.remal.sonarlint.gradle.plugin:3.3.8=classpath
 empty=

gradle.lockfile

@@ -17,8 +17,8 @@ commons-codec:commons-codec:1.15=checkstyle
 commons-collections:commons-collections:3.2.2=checkstyle
 commons-io:commons-io:2.11.0=sonarlintCoreClasspath
 info.picocli:picocli:4.7.4=checkstyle
-net.bytebuddy:byte-buddy-agent:1.14.6=testCompileClasspath,testRuntimeClasspath
-net.bytebuddy:byte-buddy:1.14.6=testCompileClasspath,testRuntimeClasspath
+net.bytebuddy:byte-buddy-agent:1.14.6=java17TestCompileClasspath,java17TestRuntimeClasspath,java20TestCompileClasspath,java20TestRuntimeClasspath,testCompileClasspath,testRuntimeClasspath
+net.bytebuddy:byte-buddy:1.14.6=java17TestCompileClasspath,java17TestRuntimeClasspath,java20TestCompileClasspath,java20TestRuntimeClasspath,testCompileClasspath,testRuntimeClasspath
 net.sf.saxon:Saxon-HE:12.3=checkstyle
 org.antlr:antlr4-runtime:4.11.1=checkstyle
 org.apache.commons:commons-compress:1.21=sonarlintCoreClasspath
@@ -39,16 +39,16 @@ org.apache.tomcat.embed:tomcat-embed-el:9.0.75=sonarlintCoreClasspath
 org.apache.tomcat.embed:tomcat-embed-jasper:9.0.75=sonarlintCoreClasspath
 org.apache.tomcat:tomcat-annotations-api:9.0.80=sonarlintCoreClasspath
 org.apache.xbean:xbean-reflect:3.7=checkstyle
-org.apiguardian:apiguardian-api:1.1.2=testCompileClasspath
-org.assertj:assertj-core:3.24.2=testCompileClasspath,testRuntimeClasspath
+org.apiguardian:apiguardian-api:1.1.2=java17TestCompileClasspath,java20TestCompileClasspath,testCompileClasspath
+org.assertj:assertj-core:3.24.2=java17TestCompileClasspath,java17TestRuntimeClasspath,java20TestCompileClasspath,java20TestRuntimeClasspath,testCompileClasspath,testRuntimeClasspath
 org.checkerframework:checker-qual:3.27.0=checkstyle
 org.codehaus.plexus:plexus-classworlds:2.6.0=checkstyle
 org.codehaus.plexus:plexus-component-annotations:2.1.0=checkstyle
 org.codehaus.plexus:plexus-container-default:2.1.0=checkstyle
 org.codehaus.plexus:plexus-utils:3.3.0=checkstyle
 org.codehaus.woodstox:stax2-api:4.2.1=sonarlintCoreClasspath
 org.eclipse.jdt:ecj:3.33.0=sonarlintCoreClasspath
-org.eclipse.jdt:org.eclipse.jdt.annotation:2.2.700=compileClasspath,testCompileClasspath
+org.eclipse.jdt:org.eclipse.jdt.annotation:2.2.700=compileClasspath,java17CompileClasspath,java17TestCompileClasspath,java20CompileClasspath,java20TestCompileClasspath,testCompileClasspath
 org.eclipse.jdt:org.eclipse.jdt.core:3.33.0=sonarlintCoreClasspath
 org.eclipse.platform:org.eclipse.core.commands:3.10.300=sonarlintCoreClasspath
 org.eclipse.platform:org.eclipse.core.contenttype:3.8.100=sonarlintCoreClasspath
@@ -64,17 +64,17 @@ org.jacoco:org.jacoco.ant:0.8.10=jacocoAnt
 org.jacoco:org.jacoco.core:0.8.10=jacocoAnt
 org.jacoco:org.jacoco.report:0.8.10=jacocoAnt
 org.javassist:javassist:3.28.0-GA=checkstyle
-org.junit.jupiter:junit-jupiter-api:5.10.0=testCompileClasspath,testRuntimeClasspath
-org.junit.jupiter:junit-jupiter-engine:5.10.0=testRuntimeClasspath
-org.junit.jupiter:junit-jupiter-params:5.10.0=testCompileClasspath,testRuntimeClasspath
-org.junit.jupiter:junit-jupiter:5.10.0=testCompileClasspath,testRuntimeClasspath
-org.junit.platform:junit-platform-commons:1.10.0=testCompileClasspath,testRuntimeClasspath
-org.junit.platform:junit-platform-engine:1.10.0=testRuntimeClasspath
+org.junit.jupiter:junit-jupiter-api:5.10.0=java17TestCompileClasspath,java17TestRuntimeClasspath,java20TestCompileClasspath,java20TestRuntimeClasspath,testCompileClasspath,testRuntimeClasspath
+org.junit.jupiter:junit-jupiter-engine:5.10.0=java17TestRuntimeClasspath,java20TestRuntimeClasspath,testRuntimeClasspath
+org.junit.jupiter:junit-jupiter-params:5.10.0=java17TestCompileClasspath,java17TestRuntimeClasspath,java20TestCompileClasspath,java20TestRuntimeClasspath,testCompileClasspath,testRuntimeClasspath
+org.junit.jupiter:junit-jupiter:5.10.0=java17TestCompileClasspath,java17TestRuntimeClasspath,java20TestCompileClasspath,java20TestRuntimeClasspath,testCompileClasspath,testRuntimeClasspath
+org.junit.platform:junit-platform-commons:1.10.0=java17TestCompileClasspath,java17TestRuntimeClasspath,java20TestCompileClasspath,java20TestRuntimeClasspath,testCompileClasspath,testRuntimeClasspath
+org.junit.platform:junit-platform-engine:1.10.0=java17TestRuntimeClasspath,java20TestRuntimeClasspath,testRuntimeClasspath
 org.junit.platform:junit-platform-launcher:1.10.0=testRuntimeClasspath
-org.junit:junit-bom:5.10.0=testCompileClasspath,testRuntimeClasspath
-org.mockito:mockito-core:5.5.0=testCompileClasspath,testRuntimeClasspath
-org.objenesis:objenesis:3.3=testRuntimeClasspath
-org.opentest4j:opentest4j:1.3.0=testCompileClasspath,testRuntimeClasspath
+org.junit:junit-bom:5.10.0=java17TestCompileClasspath,java17TestRuntimeClasspath,java20TestCompileClasspath,java20TestRuntimeClasspath,testCompileClasspath,testRuntimeClasspath
+org.mockito:mockito-core:5.5.0=java17TestCompileClasspath,java17TestRuntimeClasspath,java20TestCompileClasspath,java20TestRuntimeClasspath,testCompileClasspath,testRuntimeClasspath
+org.objenesis:objenesis:3.3=java17TestRuntimeClasspath,java20TestRuntimeClasspath,testRuntimeClasspath
+org.opentest4j:opentest4j:1.3.0=java17TestCompileClasspath,java17TestRuntimeClasspath,java20TestCompileClasspath,java20TestRuntimeClasspath,testCompileClasspath,testRuntimeClasspath
 org.osgi:org.osgi.service.prefs:1.1.2=sonarlintCoreClasspath
 org.osgi:osgi.annotation:8.0.1=sonarlintCoreClasspath
 org.ow2.asm:asm-commons:9.5=jacocoAnt
@@ -107,4 +107,4 @@ org.sonarsource.xml:sonar-xml-plugin:2.10.0.4108=sonarlintCoreClasspath
 org.xmlresolver:xmlresolver:5.2.0=checkstyle
 xerces:xercesImpl:2.12.2=sonarlintCoreClasspath
 xml-apis:xml-apis:1.4.01=sonarlintCoreClasspath
-empty=annotationProcessor,runtimeClasspath,testAnnotationProcessor
+empty=annotationProcessor,java17AnnotationProcessor,java17RuntimeClasspath,java17TestAnnotationProcessor,java20AnnotationProcessor,java20RuntimeClasspath,java20TestAnnotationProcessor,runtimeClasspath,testAnnotationProcessor

src/main/java/io/github/joselion/maybe/Maybe.java

@@ -134,7 +134,7 @@ public static <E extends Throwable> EffectHandler<E> fromEffect(final ThrowingRu
    * In other words, the following code
    * <pre>
    *  Optional.of(value)
-   *    .map(str -> Maybe.fromResolver(() -> decode(str)));
+   *    .map(str -&gt; Maybe.fromResolver(() -&gt; decode(str)));
    * </pre>
    * Is equivalent to
    * <pre>
@@ -166,7 +166,7 @@ public static <S, T, E extends Throwable> Function<S, ResolveHandler<T, E>> part
    * In other words, the following code
    * <pre>
    *  Optional.of(value)
-   *    .map(msg -> Maybe.fromEffect(() -> sendMessage(msg)));
+   *    .map(msg -&gt; Maybe.fromEffect(() -&gt; sendMessage(msg)));
    * </pre>
    * Is equivalent to
    * <pre>
@@ -341,7 +341,8 @@ public boolean equals(final Object obj) {
       return true;
     }
 
-    if (obj instanceof final Maybe<?> other) {
+    if (obj instanceof Maybe<?>) {
+      final var other = (Maybe<?>) obj;
       return other.toOptional().equals(value);
     }
 
@@ -370,7 +371,7 @@ public int hashCode() {
   public String toString() {
     return value
       .map(Object::toString)
-      .map("Maybe[%s]"::formatted)
+      .map(it -> String.format("Maybe[%s]", it))
       .orElse("Maybe.nothing");
   }
 }

src/main/java/io/github/joselion/maybe/util/Either.java

@@ -21,7 +21,7 @@
  * @author Jose Luis Leon
  * @since v3.0.0
  */
-public sealed interface Either<L, R> {
+public interface Either<L, R> {
 
   /**
    * Factory method to create an {@code Either} instance that contains a
@@ -174,17 +174,23 @@ default Optional<R> rightToOptional() {
    *
    * @param <L> the {@code Left} data type
    * @param <R> the {@code Right} data type
-   * @param value the left value
    */
-  record Left<L, R>(L value) implements Either<L, R> {
+  class Left<L, R> implements Either<L, R> {
+
+    private final L value;
 
     /**
      * Compact constructor to validate the value is not null.
      *
      * @param value the value of the instance
      */
-    public Left {
+    public Left(final L value) {
       Objects.requireNonNull(value, "An Either cannot be created with a null value");
+      this.value = value;
+    }
+
+    L value() {
+      return this.value;
     }
 
     @Override
@@ -242,7 +248,8 @@ public boolean equals(final Object obj) {
         return true;
       }
 
-      if (obj instanceof final Left<?, ?> left) {
+      if (obj instanceof Left<?, ?>) {
+        final var left = (Left<?, ?>) obj;
         return this.value.equals(left.leftOrNull());
       }
 
@@ -256,7 +263,7 @@ public int hashCode() {
 
     @Override
     public String toString() {
-      return "Either[Left: %s]".formatted(this.value);
+      return String.format("Either[Left: %s]", this.value);
     }
   }
 
@@ -265,17 +272,23 @@ public String toString() {
    *
    * @param <L> the {@code Left} data type
    * @param <R> the {@code Right} data type
-   * @param value the right value
    */
-  record Right<L, R>(R value) implements Either<L, R> {
+  class Right<L, R> implements Either<L, R> {
+
+    private final R value;
 
     /**
      * Compact constructor to validate the value is not null.
      *
      * @param value the value of the instance
      */
-    public Right {
+    public Right(final R value) {
       Objects.requireNonNull(value, "An Either cannot be created with a null value");
+      this.value = value;
+    }
+
+    R value() {
+      return this.value;
     }
 
     @Override
@@ -333,7 +346,8 @@ public boolean equals(final Object obj) {
         return true;
       }
 
-      if (obj instanceof final Right<?, ?> right) {
+      if (obj instanceof Right<?, ?>) {
+        final var right = (Right<?, ?>) obj;
         return this.value.equals(right.rightOrNull());
       }
 
@@ -347,7 +361,7 @@ public int hashCode() {
 
     @Override
     public String toString() {
-      return "Either[Right: %s]".formatted(this.value);
+      return String.format("Either[Right: %s]", this.value);
     }
   }
 }