Examples of javax.tools.JavaFileManager

javax.tools.JavaFileManager
etf.org/rfc/rfc3986.txt">RFC 3986, section 3.3. Informally, this should be true:
```
  URI. {@linkplain java.net.URI#create create}(relativeName). {@linkplain java.net.URI#normalize normalize}(). {@linkplain java.net.URI#getPath getPath}().equals(relativeName)
```
All methods in this interface might throw a SecurityException.
An object of this interface is not required to support multi-threaded access, that is, be synchronized. However, it must support concurrent access to different file objects created by this object.
Implementation note: a consequence of this requirement is that a trivial implementation of output to a {@linkplain java.util.jar.JarOutputStream} is not a sufficient implementation.That is, rather than creating a JavaFileObject that returns the JarOutputStream directly, the contents must be cached until closed and then written to the JarOutputStream.
Unless explicitly allowed, all methods in this interface might throw a NullPointerException if given a {@code null} argument. @author Peter von der Ahé @author Jonathan Gibbons @see JavaFileObject @see FileObject @since 1.6

     *
     * @param key The resource key to use to log an error message
     * @param e   If non-null, pass this exception to Abort
     */
    private Iterator<Processor> handleServiceLoaderUnavailability(String key, Exception e) {
        JavaFileManager fileManager = context.get(JavaFileManager.class);


        if (fileManager instanceof JavacFileManager) {
            StandardJavaFileManager standardFileManager = (JavacFileManager) fileManager;
            Iterable<? extends File> workingPath = fileManager.hasLocation(ANNOTATION_PROCESSOR_PATH)
                ? standardFileManager.getLocation(ANNOTATION_PROCESSOR_PATH)
                : standardFileManager.getLocation(CLASS_PATH);


            if (needClassLoader(options.get("-processor"), workingPath) )
                handleException(key, e);

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                    packageInfoFiles = List.nil();


                    compiler.close(false);
                    currentContext = contextForNextRound(currentContext, true);


                    JavaFileManager fileManager = currentContext.get(JavaFileManager.class);


                    compiler = JavaCompiler.instance(currentContext);
                    List<JCCompilationUnit> parsedFiles = sourcesToParsedFiles(compiler);
                    roots = cleanTrees(roots).appendList(parsedFiles);

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        TaskListener tl = context.get(TaskListener.class);
        if (tl != null)
            next.put(TaskListener.class, tl);


        JavaFileManager jfm = context.get(JavaFileManager.class);
        assert jfm != null;
        next.put(JavaFileManager.class, jfm);
        if (jfm instanceof JavacFileManager) {
            ((JavacFileManager)jfm).setContext(next);
        }

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        }
    }


    public static void main(String... args) throws IOException {
        JavaCompilerTool tool = ToolProvider.defaultJavaCompiler();
        JavaFileManager fm = tool.getStandardFileManager();
        String srcdir = System.getProperty("test.src");
        File file = new File(srcdir, args[0]);
        JavacTaskImpl task = (JavacTaskImpl)tool.run(null, fm.getFileForInput(file.toString()));
        MyScanner.Factory.preRegister(task.getContext());
        TestJavacTaskScanner tester = new TestJavacTaskScanner(task);
        tester.run();
    }

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        CharArrayWriter messages = new CharArrayWriter();
        List<String> options = Arrays.asList("-classpath", classPath);
        List<MemoryInputFileObject> input = Arrays.asList(new MemoryInputFileObject(code));
        final ByteArrayOutputStream output = new ByteArrayOutputStream(200);


        JavaFileManager manager = new ForwardingJavaFileManager<StandardJavaFileManager>(fileManager) {
            @Override
            public JavaFileObject getJavaFileForOutput(Location location, String className, JavaFileObject.Kind kind, FileObject sibling) {
                return new MemoryOutputFileObject(output);
            }
        };

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        DiagnosticCollector<JavaFileObject> diagnostics =
                new DiagnosticCollector<JavaFileObject>();


        //the generated bytecode is fed to the class loader
        JavaFileManager jfm = new
                ForwardingJavaFileManager<StandardJavaFileManager>(
                        compiler.getStandardFileManager(diagnostics, null, null)) {


                    @Override
                    public JavaFileObject getJavaFileForOutput(Location location,

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            }
        } else if (processors != null) {
            processorIterator = processors.iterator();
        } else {
            String processorNames = options.get("-processor");
            JavaFileManager fileManager = context.get(JavaFileManager.class);
            try {
                // If processorpath is not explicitly set, use the classpath.
                processorClassLoader = fileManager.hasLocation(ANNOTATION_PROCESSOR_PATH)
                    ? fileManager.getClassLoader(ANNOTATION_PROCESSOR_PATH)
                    : fileManager.getClassLoader(CLASS_PATH);


                /*
                 * If the "-processor" option is used, search the appropriate
                 * path for the named class.  Otherwise, use a service
                 * provider mechanism to create the processor iterator.

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     *
     * @param key The resource key to use to log an error message
     * @param e   If non-null, pass this exception to Abort
     */
    private Iterator<Processor> handleServiceLoaderUnavailability(String key, Exception e) {
        JavaFileManager fileManager = context.get(JavaFileManager.class);


        if (fileManager instanceof JavacFileManager) {
            StandardJavaFileManager standardFileManager = (JavacFileManager) fileManager;
            Iterable<? extends File> workingPath = fileManager.hasLocation(ANNOTATION_PROCESSOR_PATH)
                ? standardFileManager.getLocation(ANNOTATION_PROCESSOR_PATH)
                : standardFileManager.getLocation(CLASS_PATH);


            if (needClassLoader(options.get("-processor"), workingPath) )
                handleException(key, e);

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                    packageInfoFiles = List.nil();


                    compiler.close(false);
                    currentContext = contextForNextRound(currentContext, true);


                    JavaFileManager fileManager = currentContext.get(JavaFileManager.class);


                    compiler = JavaCompiler.instance(currentContext);
                    List<JCCompilationUnit> parsedFiles = sourcesToParsedFiles(compiler);
                    roots = cleanTrees(roots).appendList(parsedFiles);

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        TaskListener tl = context.get(TaskListener.class);
        if (tl != null)
            next.put(TaskListener.class, tl);


        JavaFileManager jfm = context.get(JavaFileManager.class);
        assert jfm != null;
        next.put(JavaFileManager.class, jfm);
        if (jfm instanceof JavacFileManager) {
            ((JavacFileManager)jfm).setContext(next);
        }

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