javax.tools.StandardJavaFileManager#handleOption ( )源码实例Demo

@Test(dataProvider = "versions")
public void test(String version, int expected) throws Throwable {
    StandardJavaFileManager jfm = ToolProvider.getSystemJavaCompiler().getStandardFileManager(null, null, null);
    jfm.setLocation(jloc, List.of(new File("multi-release.jar")));

    if (version.length() > 0) {
        jfm.handleOption("--multi-release", List.of(version).iterator());
    }

    CustomClassLoader cldr = new CustomClassLoader(jfm);
    Class<?> versionClass = cldr.loadClass("version.Version");
    MethodType mt = MethodType.methodType(int.class);
    MethodHandle mh = MethodHandles.lookup().findVirtual(versionClass, "getVersion", mt);
    int v = (int)mh.invoke(versionClass.newInstance());
    Assert.assertEquals(v, expected);

    jfm.close();
}
 

/**
 * Handles the {@code --release} option.
 *
 * @param additionalOptions a predicate to handle additional options implied by the
 * {@code --release} option. The predicate should return true if all the additional
 * options were processed successfully.
 * @return true if successful, false otherwise
 */
public boolean handleReleaseOptions(Predicate<Iterable<String>> additionalOptions) {
    String platformString = options.get(Option.RELEASE);

    checkOptionAllowed(platformString == null,
            option -> error("err.release.bootclasspath.conflict", option.getPrimaryName()),
            Option.BOOT_CLASS_PATH, Option.XBOOTCLASSPATH, Option.XBOOTCLASSPATH_APPEND,
            Option.XBOOTCLASSPATH_PREPEND,
            Option.ENDORSEDDIRS, Option.DJAVA_ENDORSED_DIRS,
            Option.EXTDIRS, Option.DJAVA_EXT_DIRS,
            Option.SOURCE, Option.TARGET,
            Option.SYSTEM, Option.UPGRADE_MODULE_PATH);

    if (platformString != null) {
        PlatformDescription platformDescription = PlatformUtils.lookupPlatformDescription(platformString);

        if (platformDescription == null) {
            error("err.unsupported.release.version", platformString);
            return false;
        }

        options.put(Option.SOURCE, platformDescription.getSourceVersion());
        options.put(Option.TARGET, platformDescription.getTargetVersion());

        context.put(PlatformDescription.class, platformDescription);

        if (!additionalOptions.test(platformDescription.getAdditionalOptions()))
            return false;

        Collection<File> platformCP = platformDescription.getPlatformPath();

        if (platformCP != null) {
            JavaFileManager fm = getFileManager();

            if (!(fm instanceof StandardJavaFileManager)) {
                error("err.release.not.standard.file.manager");
                return false;
            }

            try {
                StandardJavaFileManager sfm = (StandardJavaFileManager) fm;

                if (Source.instance(context).allowModules()) {
                    sfm.handleOption("--system", Collections.singletonList("none").iterator());
                    sfm.setLocation(StandardLocation.UPGRADE_MODULE_PATH, platformCP);
                } else {
                    sfm.setLocation(StandardLocation.PLATFORM_CLASS_PATH, platformCP);
                }
            } catch (IOException ex) {
                log.printLines(PrefixKind.JAVAC, "msg.io");
                ex.printStackTrace(log.getWriter(WriterKind.NOTICE));
                return false;
            }
        }
    }

    return true;
}
 

/**
 * Handles the {@code --release} option.
 *
 * @param additionalOptions a predicate to handle additional options implied by the
 * {@code --release} option. The predicate should return true if all the additional
 * options were processed successfully.
 * @return true if successful, false otherwise
 */
public boolean handleReleaseOptions(Predicate<Iterable<String>> additionalOptions) {
    String platformString = options.get(Option.RELEASE);

    checkOptionAllowed(platformString == null,
            option -> error("err.release.bootclasspath.conflict", option.getPrimaryName()),
            Option.BOOT_CLASS_PATH, Option.XBOOTCLASSPATH, Option.XBOOTCLASSPATH_APPEND,
            Option.XBOOTCLASSPATH_PREPEND,
            Option.ENDORSEDDIRS, Option.DJAVA_ENDORSED_DIRS,
            Option.EXTDIRS, Option.DJAVA_EXT_DIRS,
            Option.SOURCE, Option.TARGET,
            Option.SYSTEM, Option.UPGRADE_MODULE_PATH);

    if (platformString != null) {
        PlatformDescription platformDescription = PlatformUtils.lookupPlatformDescription(platformString);

        if (platformDescription == null) {
            error("err.unsupported.release.version", platformString);
            return false;
        }

        options.put(Option.SOURCE, platformDescription.getSourceVersion());
        options.put(Option.TARGET, platformDescription.getTargetVersion());

        context.put(PlatformDescription.class, platformDescription);

        if (!additionalOptions.test(platformDescription.getAdditionalOptions()))
            return false;

        Collection<Path> platformCP = platformDescription.getPlatformPath();

        if (platformCP != null) {
            JavaFileManager fm = getFileManager();

            if (!(fm instanceof StandardJavaFileManager)) {
                error("err.release.not.standard.file.manager");
                return false;
            }

            try {
                StandardJavaFileManager sfm = (StandardJavaFileManager) fm;

                if (Source.instance(context).allowModules()) {
                    sfm.handleOption("--system", Arrays.asList("none").iterator());
                    sfm.setLocationFromPaths(StandardLocation.UPGRADE_MODULE_PATH, platformCP);
                } else {
                    sfm.setLocationFromPaths(StandardLocation.PLATFORM_CLASS_PATH, platformCP);
                }
            } catch (IOException ex) {
                log.printLines(PrefixKind.JAVAC, "msg.io");
                ex.printStackTrace(log.getWriter(WriterKind.NOTICE));
                return false;
            }
        }
    }

    return true;
}