Java Code Examples for org.gradle.api.JavaVersion

private void setJavaRelease(JavaCompile javaCompile, int javaRelease) {
    String currentJavaVersion = JavaVersion.current().toString();
    if (!javaCompile.getSourceCompatibility().equals(currentJavaVersion)) {
        throw new IllegalStateException("sourceCompatibility should not be set together with --release option");
    }
    if (!javaCompile.getTargetCompatibility().equals(currentJavaVersion)) {
        throw new IllegalStateException("targetCompatibility should not be set together with --release option");
    }

    List<String> compilerArgs = javaCompile.getOptions().getCompilerArgs();
    if (compilerArgs.contains("--release")) {
        throw new IllegalStateException("--release option is already set in compiler args");
    }

    compilerArgs.add("--release");
    compilerArgs.add(String.valueOf(javaRelease));
}
 

public List<JvmInstallation> findJvms() {
    Set<File> javaHomes = new HashSet<File>();
    List<JvmInstallation> jvms = new ArrayList<JvmInstallation>();
    for (File file : new File(SystemProperties.getUserHome()).listFiles()) {
        Matcher matcher = JDK_DIR.matcher(file.getName());
        if (!matcher.matches()) {
            continue;
        }
        File javaHome = fileCanonicalizer.canonicalize(file);
        if (!javaHomes.add(javaHome)) {
            continue;
        }
        if (!new File(file, "bin/javac").isFile()) {
            continue;
        }
        String version = matcher.group(1);
        jvms.add(new JvmInstallation(JavaVersion.toVersion(version), version, file, true, JvmInstallation.Arch.Unknown));
    }
    return jvms;
}
 

/**
 * @param os the OS
 * @param suppliedJavaBase initial location to discover from. May be jdk or jre.
 */
Jvm(OperatingSystem os, File suppliedJavaBase) {
    this.os = os;
    if (suppliedJavaBase == null) {
        //discover based on what's in the sys. property
        try {
            this.javaBase = new File(System.getProperty("java.home")).getCanonicalFile();
        } catch (IOException e) {
            throw new UncheckedException(e);
        }
        this.javaHome = findJavaHome(javaBase);
        this.javaVersion = JavaVersion.current();
        this.userSupplied = false;
    } else {
        //precisely use what the user wants and validate strictly further on
        this.javaBase = suppliedJavaBase;
        this.javaHome = suppliedJavaBase;
        this.userSupplied = true;
        this.javaVersion = null;
    }
}
 

private void findJvms(WindowsRegistry windowsRegistry, String sdkSubkey, Collection<JvmInstallation> jvms, boolean jdk, JvmInstallation.Arch arch) {
    List<String> versions;
    try {
        versions = windowsRegistry.getSubkeys(WindowsRegistry.Key.HKEY_LOCAL_MACHINE, sdkSubkey);
    } catch (MissingRegistryEntryException e) {
        // Ignore
        return;
    }

    for (String version : versions) {
        if (version.matches("\\d+\\.\\d+")) {
            continue;
        }
        String javaHome = windowsRegistry.getStringValue(WindowsRegistry.Key.HKEY_LOCAL_MACHINE, sdkSubkey + '\\' + version, "JavaHome");
        jvms.add(new JvmInstallation(JavaVersion.toVersion(version), version, new File(javaHome), jdk, arch));
    }
}
 

public List<JvmInstallation> findJvms() {
    Set<File> javaHomes = new HashSet<File>();
    List<JvmInstallation> jvms = new ArrayList<JvmInstallation>();
    for (File file : new File(SystemProperties.getUserHome()).listFiles()) {
        Matcher matcher = JDK_DIR.matcher(file.getName());
        if (!matcher.matches()) {
            continue;
        }
        File javaHome = fileCanonicalizer.canonicalize(file);
        if (!javaHomes.add(javaHome)) {
            continue;
        }
        if (!new File(file, "bin/javac").isFile()) {
            continue;
        }
        String version = matcher.group(1);
        jvms.add(new JvmInstallation(JavaVersion.toVersion(version), version, file, true, JvmInstallation.Arch.Unknown));
    }
    return jvms;
}
 

static JavaVersion parseJavaVersionCommandOutput(BufferedReader reader) {
    try {
        String versionStr = reader.readLine();
        while (versionStr != null) {
            Matcher matcher = Pattern.compile("(?:java|openjdk) version \"(.+?)\"").matcher(versionStr);
            if (matcher.matches()) {
                return JavaVersion.toVersion(matcher.group(1));
            }
            versionStr = reader.readLine();
        }
    } catch (IOException e) {
        throw new org.gradle.api.UncheckedIOException(e);
    }

    throw new RuntimeException("Could not determine Java version.");
}
 

@Override
protected void store(Properties properties) {
    properties.put("org.eclipse.jdt.core.compiler.compliance", sourceCompatibility.toString());
    properties.put("org.eclipse.jdt.core.compiler.source", sourceCompatibility.toString());

    if (sourceCompatibility.compareTo(JavaVersion.VERSION_1_3) <= 0) {
        properties.put("org.eclipse.jdt.core.compiler.problem.assertIdentifier", "ignore");
        properties.put("org.eclipse.jdt.core.compiler.problem.enumIdentifier", "ignore");
    } else if (sourceCompatibility == JavaVersion.VERSION_1_4) {
        properties.put("org.eclipse.jdt.core.compiler.problem.assertIdentifier", "error");
        properties.put("org.eclipse.jdt.core.compiler.problem.enumIdentifier", "warning");
    } else {
        properties.put("org.eclipse.jdt.core.compiler.problem.assertIdentifier", "error");
        properties.put("org.eclipse.jdt.core.compiler.problem.enumIdentifier", "error");
    }

    properties.put("org.eclipse.jdt.core.compiler.codegen.targetPlatform", targetCompatibility.toString());
}
 

@Inject
public CreateInjectDexes(InjectorExtension extension,
                         String projectPackageName,
                         String variantName,
                         String buildDirectory,
                         Set<? extends AndroidArchiveLibrary> androidArchiveLibraries,
                         Set<? extends ResolvedArtifact> jarFiles,
                         int minApiLevel,
                         JavaVersion sourceCompatibilityVersion,
                         JavaVersion targetCompatibilityVersion) {
	this.sourceCompatibilityVersion = sourceCompatibilityVersion;
	this.targetCompatibilityVersion = targetCompatibilityVersion;
	this.minApiLevel = minApiLevel;
	this.variantName = variantName;
	this.projectPackageName = projectPackageName;
	this.buildDirectory = buildDirectory;
	this.androidArchiveLibraries = new HashSet<>(androidArchiveLibraries);
	this.jarFiles = new HashSet<>(jarFiles);
	this.extension = extension;
}
 

@Override
protected void compile(IncrementalTaskInputs inputs) {
    getLogger().info(
            "Compiling with source level {} and target level {}.",
            getSourceCompatibility(),
            getTargetCompatibility());
    if (isPostN()) {
        if (!JavaVersion.current().isJava8Compatible()) {
            throw new RuntimeException("compileSdkVersion '" + compileSdkVersion + "' requires "
                    + "JDK 1.8 or later to compile.");
        }
    }

    if (awbBundle.isDataBindEnabled() && !analyticsed) {
        processAnalytics();
        analyticsed = true;
    }

    // Create directory for output of annotation processor.
    FileUtils.mkdirs(annotationProcessorOutputFolder);

    mInstantRunBuildContext.startRecording(InstantRunBuildContext.TaskType.JAVAC);
    compile();
    mInstantRunBuildContext.stopRecording(InstantRunBuildContext.TaskType.JAVAC);
}
 

private void configureDependencyConstraints(Project project) {
  project.getDependencies().getModules().module("org.clojure:tools.nrepl", module -> {
    ComponentModuleMetadataDetails details = (ComponentModuleMetadataDetails) module;
    details.replacedBy("nrepl:nrepl", "nREPL was moved out of Clojure Contrib to its own project.");
  });

  if (JavaVersion.current().isJava9Compatible()) {
    project.getDependencies().constraints(constraints -> {
      constraints.add("devImplementation", "org.clojure:java.classpath:0.3.0", constraint -> {
        constraint.because("Java 9 has a different classloader architecture. 0.3.0 adds support for this.");
      });
      constraints.add("devRuntimeOnly", "org.clojure:java.classpath:0.3.0", constraint -> {
        constraint.because("Java 9 has a different classloader architecture. 0.3.0 adds support for this.");
      });
    });
  }
}
 

public void execute(JvmLibrarySpec jvmLibrary) {
    List<String> targetPlatforms = jvmLibrary.getTargetPlatforms();
    // TODO:DAZ We should have a generic (JVM + Native) way to get the 'best' platform to build when no target is defined.
    // This logic needs to inspect the available platforms and find the closest one matching the current platform
    if (targetPlatforms.isEmpty()) {
        targetPlatforms = Collections.singletonList(new DefaultJavaPlatform(JavaVersion.current()).getName());
    }
    List<JavaPlatform> selectedPlatforms = platforms.select(JavaPlatform.class, targetPlatforms);
    for (JavaPlatform platform: selectedPlatforms) {
        JavaToolChain toolChain = toolChains.getForPlatform(platform);
        BinaryNamingSchemeBuilder componentBuilder = namingSchemeBuilder
                .withComponentName(jvmLibrary.getName())
                .withTypeString("jar");
        if (selectedPlatforms.size() > 1) { //Only add variant dimension for multiple jdk targets to avoid breaking the default naming scheme
            componentBuilder = componentBuilder.withVariantDimension(platform.getName());
        }
        BinaryNamingScheme namingScheme = componentBuilder.build(); //TODO freekh: move out?
        factory.createJarBinaries(jvmLibrary, namingScheme, toolChain, platform); //TODO: createJarBinaries is mutable! We should not be doing this - execute could return a list instead
    }
}
 

static JavaVersion parseJavaVersionCommandOutput(BufferedReader reader) {
    try {
        String versionStr = reader.readLine();
        while (versionStr != null) {
            Matcher matcher = Pattern.compile("(?:java|openjdk) version \"(.+?)\"").matcher(versionStr);
            if (matcher.matches()) {
                return JavaVersion.toVersion(matcher.group(1));
            }
            versionStr = reader.readLine();
        }
    } catch (IOException e) {
        throw new org.gradle.api.UncheckedIOException(e);
    }

    throw new RuntimeException("Could not determine Java version.");
}
 

public void validateClasspath(Iterable<String> fileNamesOnClasspath) {
    VersionNumber v = getFindbugsVersion(fileNamesOnClasspath);
    boolean java6orLess = javaVersion.compareTo(JavaVersion.VERSION_1_7) < 0;
    boolean findbugs3orMore = v.getMajor() > 2;
    if (java6orLess && findbugs3orMore) {
        throw new FindBugsVersionTooHighException("The version of FindBugs (" + v + ") inferred from FindBugs classpath is too high to work with currently used Java version (" + javaVersion + ")."
                + " Please use lower version of FindBugs or use newer version of Java. Inspected FindBugs classpath: " + fileNamesOnClasspath);
    }
    boolean java8orMore = javaVersion.compareTo(JavaVersion.VERSION_1_7) > 0;
    boolean findbugs2orLess = v.getMajor() < 3;
    if (java8orMore && findbugs2orLess) {
        throw new FindBugsVersionTooLowException("The version of FindBugs (" + v + ") inferred from FindBugs classpath is too low to work with currently used Java version (" + javaVersion + ")."
                + " Please use higher version of FindBugs. Inspected FindBugs classpath: " + fileNamesOnClasspath);
    }
}
 

public JvmInstallation(JavaVersion javaVersion, String version, File javaHome, boolean jdk, Arch arch) {
    this.javaVersion = javaVersion;
    this.version = VersionNumber.withPatchNumber().parse(version);
    this.javaHome = javaHome;
    this.jdk = jdk;
    this.arch = arch;
}
 

/**
 * Locates a JDK installation for the given version.
 *
 * @return null if not found.
 */
@Nullable
public static JavaInfo getJdk(JavaVersion version) {
    for (JvmInstallation candidate : getJvms()) {
        if (candidate.getJavaVersion().equals(version) && candidate.isJdk()) {
            return Jvm.forHome(candidate.getJavaHome());
        }
    }
    return null;
}
 

public List<JvmInstallation> findJvms() {
    List<JvmInstallation> jvms = new ArrayList<JvmInstallation>();
    if (OperatingSystem.current().isLinux()) {
        jvms = addJvm(jvms, JavaVersion.VERSION_1_5, "1.5.0", new File("/opt/jdk/sun-jdk-5"), true, JvmInstallation.Arch.i386);
        jvms = addJvm(jvms, JavaVersion.VERSION_1_6, "1.6.0", new File("/opt/jdk/sun-jdk-6"), true, JvmInstallation.Arch.x86_64);
        jvms = addJvm(jvms, JavaVersion.VERSION_1_6, "1.6.0", new File("/opt/jdk/ibm-jdk-6"), true, JvmInstallation.Arch.x86_64);
        jvms = addJvm(jvms, JavaVersion.VERSION_1_7, "1.7.0", new File("/opt/jdk/oracle-jdk-7"), true, JvmInstallation.Arch.x86_64);
        jvms = addJvm(jvms, JavaVersion.VERSION_1_8, "1.8.0", new File("/opt/jdk/oracle-jdk-8"), true, JvmInstallation.Arch.x86_64);
    }
    return CollectionUtils.filter(jvms, new Spec<JvmInstallation>() {
        public boolean isSatisfiedBy(JvmInstallation element) {
            return element.getJavaHome().isDirectory();
        }
    });
}
 

/**
 * Locates a JDK installation for the given version.
 *
 * @return null if not found.
 */
@Nullable
public static JavaInfo getJdk(JavaVersion version) {
    for (JvmInstallation candidate : getJvms()) {
        if (candidate.getJavaVersion().equals(version) && candidate.isJdk()) {
            return Jvm.forHome(candidate.getJavaHome());
        }
    }
    return null;
}
 

public List<JvmInstallation> findJvms() {
    List<JvmInstallation> jvms = new ArrayList<JvmInstallation>();
    if (OperatingSystem.current().isLinux()) {
        jvms = addJvm(jvms, JavaVersion.VERSION_1_5, "1.5.0", new File("/opt/jdk/sun-jdk-5"), true, JvmInstallation.Arch.i386);
        jvms = addJvm(jvms, JavaVersion.VERSION_1_6, "1.6.0", new File("/opt/jdk/sun-jdk-6"), true, JvmInstallation.Arch.x86_64);
        jvms = addJvm(jvms, JavaVersion.VERSION_1_6, "1.6.0", new File("/opt/jdk/ibm-jdk-6"), true, JvmInstallation.Arch.x86_64);
        jvms = addJvm(jvms, JavaVersion.VERSION_1_7, "1.7.0", new File("/opt/jdk/oracle-jdk-7"), true, JvmInstallation.Arch.x86_64);
        jvms = addJvm(jvms, JavaVersion.VERSION_1_8, "1.8.0", new File("/opt/jdk/oracle-jdk-8"), true, JvmInstallation.Arch.x86_64);
    }
    return CollectionUtils.filter(jvms, new Spec<JvmInstallation>() {
        public boolean isSatisfiedBy(JvmInstallation element) {
            return element.getJavaHome().isDirectory();
        }
    });
}
 

public TestNGTestFramework(Test testTask, DefaultTestFilter filter, Instantiator instantiator) {
    this.testTask = testTask;
    this.filter = filter;
    options = instantiator.newInstance(TestNGOptions.class, testTask.getProject().getProjectDir());
    options.setAnnotationsOnSourceCompatibility(JavaVersion.toVersion(testTask.getProject().property("sourceCompatibility")));
    conventionMapOutputDirectory(options, testTask.getReports().getHtml());
    detector = new TestNGDetector(new ClassFileExtractionManager(testTask.getTemporaryDirFactory()));
}
 

@Override
protected List<String> getGradleOpts() {
    if (isNoDefaultJvmArgs()) {
        return super.getGradleOpts();
    } else {
        // Workaround for http://issues.gradle.org/browse/GRADLE-2629
        // Instead of just adding these as standalone opts, we need to add to
        // -Dorg.gradle.jvmArgs in order for them to be effectual
        List<String> jvmArgs = new ArrayList<String>(4);
        jvmArgs.add("-XX:MaxPermSize=320m");
        jvmArgs.add("-XX:+HeapDumpOnOutOfMemoryError");
        jvmArgs.add("-XX:HeapDumpPath=" + buildContext.getGradleUserHomeDir().getAbsolutePath());
        if (JavaVersion.current().isJava5()) {
            jvmArgs.add("-XX:+CMSPermGenSweepingEnabled");
            jvmArgs.add("-Dcom.sun.management.jmxremote");
        }

        String quotedArgs = join(" ", collect(jvmArgs, new Transformer<String, String>() {
            public String transform(String input) {
                return String.format("'%s'", input);
            }
        }));

        List<String> gradleOpts = new ArrayList<String>(super.getGradleOpts());
        gradleOpts.add("-Dorg.gradle.jvmArgs=" +  quotedArgs);
        return gradleOpts;
    }
}
 

public Compiler<JavaCompileSpec> create(CompileOptions options) {
    if (JavaVersion.current().isJava6Compatible()) {
        return createJdk6Compiler();
    }
    if (SUN_COMPILER_AVAILABLE) {
        return new SunCompilerFactory().create();
    }
    throw new RuntimeException("Cannot find a Java compiler API. Please let us know which JDK/platform you are using. To work around this problem, try 'compileJava.options.useAnt=true'.");
}
 

public TestNGTestFramework(Test testTask, DefaultTestFilter filter, Instantiator instantiator) {
    this.testTask = testTask;
    this.filter = filter;
    options = instantiator.newInstance(TestNGOptions.class, testTask.getProject().getProjectDir());
    options.setAnnotationsOnSourceCompatibility(JavaVersion.toVersion(testTask.getProject().property("sourceCompatibility")));
    conventionMapOutputDirectory(options, testTask.getReports().getHtml());
    detector = new TestNGDetector(new ClassFileExtractionManager(testTask.getTemporaryDirFactory()));
}
 

public PlayExtension(ObjectFactory objectFactory) {
    this.platform = objectFactory.newInstance(PlayPlatform.class, objectFactory);
    this.platform.getPlayVersion().convention(DEFAULT_PLAY_VERSION);
    this.platform.getJavaVersion().convention(JavaVersion.current());
    this.platform.getScalaVersion().convention(platform.getPlayVersion().map(playVersion -> PlayMajorVersion.forPlayVersion(playVersion).getDefaultScalaPlatform()));
    this.injectedRoutesGenerator = objectFactory.property(Boolean.class);
    injectedRoutesGenerator.convention(platform.getPlayVersion().map(playVersion -> !PlayMajorVersion.forPlayVersion(playVersion).hasSupportForStaticRoutesGenerator()));
}
 

public TestNGTestFramework(Test testTask, DefaultTestFilter filter, Instantiator instantiator) {
    this.testTask = testTask;
    this.filter = filter;
    options = instantiator.newInstance(TestNGOptions.class, testTask.getProject().getProjectDir());
    options.setAnnotationsOnSourceCompatibility(JavaVersion.toVersion(testTask.getProject().property("sourceCompatibility")));
    conventionMapOutputDirectory(options, testTask.getReports().getHtml());
    detector = new TestNGDetector(new ClassFileExtractionManager(testTask.getTemporaryDirFactory()));
}
 

/**
 * Determines the java language level to use and sets it on the given task and
 * {@link CompileOptions}. The latter is to propagate the information to Studio.
 */
public static void configureLanguageLevel(
        AbstractCompile compileTask,
        final CompileOptions compileOptions,
        String compileSdkVersion) {
    final AndroidVersion hash = AndroidTargetHash.getVersionFromHash(compileSdkVersion);
    Integer compileSdkLevel = (hash == null ? null : hash.getApiLevel());

    JavaVersion javaVersionToUse;
    if (compileSdkLevel == null || (0 <= compileSdkLevel && compileSdkLevel <= 20)) {
        javaVersionToUse = JavaVersion.VERSION_1_6;
    } else {
        javaVersionToUse = JavaVersion.VERSION_1_7;
    }

    JavaVersion jdkVersion =
            JavaVersion.toVersion(System.getProperty("java.specification.version"));
    if (jdkVersion.compareTo(javaVersionToUse) < 0) {
        compileTask.getLogger().warn(
                "Default language level for compileSdkVersion '{}' is " +
                        "{}, but the JDK used is {}, so the JDK language level will be used.",
                compileSdkVersion,
                javaVersionToUse,
                jdkVersion);
        javaVersionToUse = jdkVersion;
    }

    compileOptions.setDefaultJavaVersion(javaVersionToUse);

    compileTask.setSourceCompatibility(compileOptions.getSourceCompatibility().toString());
    compileTask.setTargetCompatibility(compileOptions.getTargetCompatibility().toString());
}
 

/**
 * Convert all possible supported way of specifying a Java version to {@link JavaVersion}
 *
 * @param version the user provided java version.
 * @return {@link JavaVersion}
 * @throws RuntimeException if it cannot be converted.
 */
@NonNull
private static JavaVersion convert(@NonNull Object version) {
    // for backward version reasons, we support setting strings like 'Version_1_6'
    if (version instanceof String) {
        final String versionString = (String) version;
        if (versionString.toUpperCase(Locale.ENGLISH).startsWith(VERSION_PREFIX)) {
            version = versionString.substring(VERSION_PREFIX.length()).replace('_', '.');
        }
    }
    return JavaVersion.toVersion(version);
}
 

private String getJavaSeLink() {
    JavaVersion javaVersion = JavaVersion.current();

    JavaToolChain toolChain = javadoc.getToolChain();
    if (toolChain instanceof JavaToolChainInternal) {
        javaVersion = ((JavaToolChainInternal) toolChain).getJavaVersion();
    }

    if (javaVersion.isJava11Compatible()) {
        return "https://docs.oracle.com/en/java/javase/" + javaVersion.getMajorVersion() + "/docs/api/";
    }
    else {
        return "https://docs.oracle.com/javase/" + javaVersion.getMajorVersion() + "/docs/api/";
    }
}
 

private String getJavaSeLink() {
    JavaVersion javaVersion = JavaVersion.current();

    JavaToolChain toolChain = javadoc.getToolChain();
    if (toolChain instanceof JavaToolChainInternal) {
        javaVersion = ((JavaToolChainInternal) toolChain).getJavaVersion();
    }

    if (javaVersion.isJava11Compatible()) {
        return "https://docs.oracle.com/en/java/javase/" + javaVersion.getMajorVersion() + "/docs/api/";
    }
    else {
        return "https://docs.oracle.com/javase/" + javaVersion.getMajorVersion() + "/docs/api/";
    }
}
 

public void validateClasspath(Iterable<String> fileNamesOnClasspath) {
    VersionNumber v = getFindbugsVersion(fileNamesOnClasspath);
    boolean java6orLess = javaVersion.compareTo(JavaVersion.VERSION_1_7) < 0;
    boolean findbugs3orMore = v.getMajor() > 2;
    if (java6orLess && findbugs3orMore) {
        throw new FindBugsVersionTooHighException("The version of FindBugs (" + v + ") inferred from FindBugs classpath is too high to work with currently used Java version (" + javaVersion + ")."
                + " Please use lower version of FindBugs or use newer version of Java. Inspected FindBugs classpath: " + fileNamesOnClasspath);
    }
    boolean java8orMore = javaVersion.compareTo(JavaVersion.VERSION_1_7) > 0;
    boolean findbugs2orLess = v.getMajor() < 3;
    if (java8orMore && findbugs2orLess) {
        throw new FindBugsVersionTooLowException("The version of FindBugs (" + v + ") inferred from FindBugs classpath is too low to work with currently used Java version (" + javaVersion + ")."
                + " Please use higher version of FindBugs. Inspected FindBugs classpath: " + fileNamesOnClasspath);
    }
}
 

public TestNGTestFramework(Test testTask, DefaultTestFilter filter, Instantiator instantiator) {
    this.testTask = testTask;
    this.filter = filter;
    options = instantiator.newInstance(TestNGOptions.class, testTask.getProject().getProjectDir());
    options.setAnnotationsOnSourceCompatibility(JavaVersion.toVersion(testTask.getProject().property("sourceCompatibility")));
    conventionMapOutputDirectory(options, testTask.getReports().getHtml());
    detector = new TestNGDetector(new ClassFileExtractionManager(testTask.getTemporaryDirFactory()));
}