Java JavacTask.setTaskListener方法代碼示例

import com.sun.source.util.JavacTask; //導入方法依賴的package包/類
/**
 * Fork a new compilation task; if possible the compilation context from previous executions is
 * retained (see comments in ReusableContext as to when it's safe to do so); otherwise a brand
 * new context is created.
 */
public JavacTask getTask() {
    if (task == null) {
        ReusableContext context = env.context();
        String opts = options == null ? "" :
                StreamSupport.stream(options.spliterator(), false).collect(Collectors.joining());
        context.clear();
        if (!context.polluted && (context.opts == null || context.opts.equals(opts))) {
            //we can reuse former context
            env.info().ctxReusedCount++;
        } else {
            env.info().ctxDroppedCount++;
            //it's not safe to reuse context - create a new one
            context = env.setContext(new ReusableContext());
        }
        context.opts = opts;
        JavacTask javacTask = ((JavacTool)env.javaCompiler()).getTask(out, env.fileManager(),
                diagsCollector, options, null, sources, context);
        javacTask.setTaskListener(context);
        for (TaskListener l : listeners) {
            javacTask.addTaskListener(l);
        }
        task = javacTask;
    }
    return task;
}
 

import com.sun.source.util.JavacTask; //導入方法依賴的package包/類
void run() throws IOException {
    File testSrc = new File(System.getProperty("test.src"));
    File testClasses = new File(System.getProperty("test.classes"));

    JavacTool tool = (JavacTool) ToolProvider.getSystemJavaCompiler();
    final ClassLoader cl = getClass().getClassLoader();
    Context c = new Context();
    StandardJavaFileManager fm = new JavacFileManager(c, true, null) {
        @Override
        protected ClassLoader getClassLoader(URL[] urls) {
            return new URLClassLoader(urls, cl) {
                @Override
                public void close() throws IOException {
                    System.err.println(getClass().getName() + " closing");
                    TestClose2.this.closedCount++;
                    TestClose2.this.closedIsLast = true;
                    super.close();
                }
            };
        }
    };

    fm.setLocation(StandardLocation.CLASS_OUTPUT,
            Collections.singleton(new File(".")));
    fm.setLocation(StandardLocation.ANNOTATION_PROCESSOR_PATH,
            Collections.singleton(testClasses));
    Iterable<? extends JavaFileObject> files =
            fm.getJavaFileObjects(new File(testSrc, TestClose2.class.getName() + ".java"));
    List<String> options = Arrays.asList(
            "--add-exports", "jdk.compiler/com.sun.tools.javac.api=ALL-UNNAMED",
            "--add-exports", "jdk.compiler/com.sun.tools.javac.file=ALL-UNNAMED",
            "--add-exports", "jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED",
            "-processor", TestClose2.class.getName());

    JavacTask task = tool.getTask(null, fm, null, options, null, files);
    task.setTaskListener(this);

    if (!task.call())
        throw new Error("compilation failed");

    if (closedCount == 0)
        throw new Error("no closing message");
    else if (closedCount > 1)
        throw new Error(closedCount + " closed messages");

    if (!closedIsLast)
        throw new Error("closing message not last");
}
 

import com.sun.source.util.JavacTask; //導入方法依賴的package包/類
void test(CompileKind ck, AddKind ak, RemoveKind rk) throws IOException {
    System.err.println("Test: " + ck + " " + ak + " " + rk);

    File tmpDir = new File(ck + "-" + ak + "-" + rk);
    tmpDir.mkdirs();
    fm.setLocation(StandardLocation.CLASS_OUTPUT, Arrays.asList(tmpDir));

    List<String> options = new ArrayList<String>();
    Iterable<? extends JavaFileObject> files = Arrays.asList(new TestSource());
    StringWriter sw = new StringWriter();
    PrintWriter pw = new PrintWriter(sw);
    JavacTask task = tool.getTask(pw, fm, null, options, null, files);

    EventKindCounter ec = new EventKindCounter();
    TaskListener listener = new TestListener(ec);
    boolean needProcessor = false;

    switch (ak) {
        case SET_IN_TASK:
            task.setTaskListener(listener);
            break;
        case ADD_IN_TASK:
            task.addTaskListener(listener);
            break;
        case ADD_IN_PROCESSOR:
        case ADD_IN_LISTENER:
            needProcessor = true;
    }

    switch (rk) {
        case REMOVE_IN_TASK:
            task.removeTaskListener(listener);
            break;
        case REMOVE_IN_PROCESSOR:
        case REMOVE_IN_LISTENER:
            needProcessor = true;
    }

    if (needProcessor)
        task.setProcessors(Arrays.asList(new TestProcessor(ak, rk, listener)));

    ck.run(task);
    System.err.println(ec);

    check(ck, ak, rk, ec);

    System.err.println();
}