com.sun.tools.javac.file.JavacFileManager Java Examples

/**
 * Setup env by creating pseudo-random collection of names, packages and classes.
 */
void setup() {
    log ("setup");
    context = new Context();
    JavacFileManager.preRegister(context); // required by ClassReader which is required by Symtab
    make = TreeMaker.instance(context);
    names = Names.instance(context);       // Name.Table impls tied to an instance of Names
    symtab = Symtab.instance(context);
    types = Types.instance(context);
    int setupCount = rgen.nextInt(MAX_SETUP_COUNT);
    for (int i = 0; i < setupCount; i++) {
        switch (random(SetupKind.values())) {
            case NAMES:
                setupNames();
                break;
            case PACKAGE:
                setupPackage();
                break;
            case CLASS:
                setupClass();
                break;
        }
    }
}
 

void run() throws Exception {
    RelativeFile TEST_ENTRY_NAME = new RelativeFile("java/lang/String.class");

    File testJar = createJar("test.jar", "java.lang.*");

    try (JarFile j = new JarFile(testJar)) {
        JarEntry je = j.getJarEntry(TEST_ENTRY_NAME.getPath());
        long jarEntryTime = je.getTime();

        Context context = new Context();
        JavacFileManager fm = new JavacFileManager(context, false, null);
        fm.setLocation(StandardLocation.CLASS_PATH, Collections.singletonList(testJar));
        FileObject fo =
            fm.getFileForInput(StandardLocation.CLASS_PATH, "", TEST_ENTRY_NAME.getPath());
        long jfoTime = fo.getLastModified();

        check(je, jarEntryTime, fo, jfoTime);

        if (errors > 0)
            throw new Exception(errors + " occurred");
    }
}
 

static void test(JavacFileManager fm, JavaFileObject f, String... args) throws Throwable {
    Context context = new Context();
    fm.setContext(context);

    Main compilerMain = new Main("javac", new PrintWriter(System.err, true));
    compilerMain.setOptions(Options.instance(context));
    compilerMain.filenames = new LinkedHashSet<File>();
    compilerMain.processArgs(args);

    JavaCompiler c = JavaCompiler.instance(context);

    c.compile(List.of(f));

    if (c.errorCount() != 0)
        throw new AssertionError("compilation failed");

    long msec = c.elapsed_msec;
    if (msec < 0 || msec > 5 * 60 * 1000) // allow test 5 mins to execute, should be more than enough!
        throw new AssertionError("elapsed time is suspect: " + msec);
}
 

/**
 * Returns an empty processor iterator if no processors are on the
 * relevant path, otherwise if processors are present, logs an
 * error.  Called when a service loader is unavailable for some
 * reason, either because a service loader class cannot be found
 * or because a security policy prevents class loaders from being
 * created.
 *
 * @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);

    } else {
        handleException(key, e);
    }

    java.util.List<Processor> pl = Collections.emptyList();
    return pl.iterator();
}
 

void run() throws Exception {
    Context context = new Context();
    JavacFileManager.preRegister(context);
    Trees trees = JavacTrees.instance(context);
    StringWriter strOut = new StringWriter();
    PrintWriter pw = new PrintWriter(strOut);
    DPrinter dprinter = new DPrinter(pw, trees);
    final JavaCompiler tool = ToolProvider.getSystemJavaCompiler();
    JavacTask ct = (JavacTask)tool.getTask(null, null, null, null, null, Arrays.asList(new JavaSource()));
    Iterable<? extends CompilationUnitTree> elements = ct.parse();
    ct.analyze();
    Assert.check(elements.iterator().hasNext());
    dprinter.treeTypes(true).printTree("", (JCTree)elements.iterator().next());
    String output = strOut.toString();
    Assert.check(!output.contains("java.lang.Object"), "there shouldn't be any type instantiated to Object");
}
 

static void testNoAnnotationProcessing(JavacFileManager fm, JavaFileObject f) throws Throwable {
    Context context = new Context();
    fm.setContext(context);

    Main compilerMain = new Main("javac", new PrintWriter(System.err, true));
    compilerMain.setOptions(Options.instance(context));
    compilerMain.filenames = new LinkedHashSet<File>();
    compilerMain.processArgs(new String[] { "-d", "." });

    JavaCompiler compiler = JavaCompiler.instance(context);
    compiler.compile(List.of(f));
    try {
        compiler.compile(List.of(f));
        throw new Error("Error: AssertionError not thrown after second call of compile");
    } catch (AssertionError e) {
        System.err.println("Exception from compiler (expected): " + e);
    }
}
 

public static void main(String... args) throws Throwable {
    String self = T6358166.class.getName();

    String testSrc = System.getProperty("test.src");

    JavacFileManager fm = new JavacFileManager(new Context(), false, null);
    JavaFileObject f = fm.getJavaFileObject(testSrc + File.separatorChar + self + ".java");

    List<String> addExports = 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.main=ALL-UNNAMED",
            "--add-exports", "jdk.compiler/com.sun.tools.javac.util=ALL-UNNAMED");

    test(fm, f, addExports, "-verbose", "-d", ".");

    test(fm, f, addExports, "-verbose", "-d", ".", "-XprintRounds", "-processorpath", ".", "-processor", self);
}
 

static void testNoAnnotationProcessing(JavacFileManager fm, JavaFileObject f) throws Throwable {
    Context context = new Context();
    fm.setContext(context);

    Main compilerMain = new Main("javac", new PrintWriter(System.err, true));
    compilerMain.setOptions(Options.instance(context));
    compilerMain.filenames = new LinkedHashSet<File>();
    compilerMain.processArgs(new String[] { "-d", "." });

    JavaCompiler compiler = JavaCompiler.instance(context);
    compiler.compile(List.of(f));
    try {
        compiler.compile(List.of(f));
        throw new Error("Error: AssertionError not thrown after second call of compile");
    } catch (AssertionError e) {
        System.err.println("Exception from compiler (expected): " + e);
    }
}
 

public static void main(String... args) throws Throwable {

        JavacFileManager fm = new JavacFileManager(new Context(), false, null);
        JavaFileObject f = fm.getFileForInput(testSrc + File.separatorChar + T6358168.class.getName() + ".java");

        try {
            // first, test case with no annotation processing
            testNoAnnotationProcessing(fm, f);

            // now, test case with annotation processing
            testAnnotationProcessing(fm, f);
        }
        catch (Throwable t) {
            AssertionError e = new AssertionError();
            e.initCause(t);
            throw e;
        }
    }
 

static void testNoAnnotationProcessing(JavacFileManager fm, JavaFileObject f) throws Throwable {
    Context context = new Context();
    fm.setContext(context);

    Main compilerMain = new Main("javac", new PrintWriter(System.err, true));
    compilerMain.setOptions(Options.instance(context));
    compilerMain.filenames = new LinkedHashSet<File>();
    compilerMain.processArgs(new String[] { "-d", "." });

    JavaCompiler compiler = JavaCompiler.instance(context);
    compiler.compile(List.of(f));
    try {
        compiler.compile(List.of(f));
        throw new Error("Error: AssertionError not thrown after second call of compile");
    } catch (AssertionError e) {
        System.err.println("Exception from compiler (expected): " + e);
    }
}
 

@Test
public void testDirectAccess2() throws Exception {
    JavaFileObject srcFile = null; // error, provokes NPE
    Iterable<? extends JavaFileObject> files = Arrays.asList(srcFile);
    Context c = new Context();
    Messager.preRegister(c, "javadoc");
    StandardJavaFileManager fm = new JavacFileManager(c, true, null);
    File outDir = getOutDir();
    fm.setLocation(DocumentationTool.Location.DOCUMENTATION_OUTPUT, Arrays.asList(outDir));
    try {
        DocumentationTask t = new JavadocTaskImpl(c, null, null, files);;
        error("getTask succeeded, no exception thrown");
    } catch (NullPointerException e) {
        System.err.println("exception caught as expected: " + e);
    }
}
 

@Test
public void testDirectAccess1() throws Exception {
    JavaFileObject srcFile = createSimpleJavaFileObject();
    Iterable<? extends JavaFileObject> files = Arrays.asList(srcFile);
    Context c = new Context();
    Messager.preRegister(c, "javadoc");
    StandardJavaFileManager fm = new JavacFileManager(c, true, null);
    File outDir = getOutDir();
    fm.setLocation(DocumentationTool.Location.DOCUMENTATION_OUTPUT, Arrays.asList(outDir));
    DocumentationTask t = new JavadocTaskImpl(c, null, null, files);
    if (t.call()) {
        System.err.println("task succeeded");
    } else {
        throw new Exception("task failed");
    }
}
 

void run() throws Exception {
    Context context = new Context();
    JavacFileManager.preRegister(context);
    Symtab syms = Symtab.instance(context);
    maker = TreeMaker.instance(context);
    types = Types.instance(context);

    test("abc",                     CLASS,      syms.stringType,    "abc");
    test(Boolean.FALSE,             BOOLEAN,    syms.booleanType,   Integer.valueOf(0));
    test(Boolean.TRUE,              BOOLEAN,    syms.booleanType,   Integer.valueOf(1));
    test(Byte.valueOf((byte) 1),    BYTE,       syms.byteType,      Byte.valueOf((byte) 1));
    test(Character.valueOf('a'),    CHAR,       syms.charType,      Integer.valueOf('a'));
    test(Double.valueOf(1d),        DOUBLE,     syms.doubleType,    Double.valueOf(1d));
    test(Float.valueOf(1f),         FLOAT,      syms.floatType,     Float.valueOf(1f));
    test(Integer.valueOf(1),        INT,        syms.intType,       Integer.valueOf(1));
    test(Long.valueOf(1),           LONG,       syms.longType,      Long.valueOf(1));
    test(Short.valueOf((short) 1),  SHORT,      syms.shortType,     Short.valueOf((short) 1));

    if (errors > 0)
        throw new Exception(errors + " errors found");
}
 

/**
 * Returns an empty processor iterator if no processors are on the
 * relevant path, otherwise if processors are present, logs an
 * error.  Called when a service loader is unavailable for some
 * reason, either because a service loader class cannot be found
 * or because a security policy prevents class loaders from being
 * created.
 *
 * @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);

    } else {
        handleException(key, e);
    }

    java.util.List<Processor> pl = Collections.emptyList();
    return pl.iterator();
}
 

@Override @DefinedBy(Api.COMPILER)
public JavacFileManager getStandardFileManager(
    DiagnosticListener<? super JavaFileObject> diagnosticListener,
    Locale locale,
    Charset charset) {
    Context context = new Context();
    context.put(Locale.class, locale);
    if (diagnosticListener != null)
        context.put(DiagnosticListener.class, diagnosticListener);
    PrintWriter pw = (charset == null)
            ? new PrintWriter(System.err, true)
            : new PrintWriter(new OutputStreamWriter(System.err, charset), true);
    context.put(Log.errKey, pw);
    CacheFSInfo.preRegister(context);
    return new JavacFileManager(context, true, charset);
}
 

public static void main(String... args) throws Throwable {

        JavacFileManager fm = new JavacFileManager(new Context(), false, null);
        JavaFileObject f = fm.getFileForInput(testSrc + File.separatorChar + T6358168.class.getName() + ".java");

        try {
            // first, test case with no annotation processing
            testNoAnnotationProcessing(fm, f);

            // now, test case with annotation processing
            testAnnotationProcessing(fm, f);
        }
        catch (Throwable t) {
            AssertionError e = new AssertionError();
            e.initCause(t);
            throw e;
        }
    }
 

static void testNoAnnotationProcessing(JavacFileManager fm, JavaFileObject f) throws Throwable {
    Context context = new Context();
    fm.setContext(context);

    Main compilerMain = new Main("javac", new PrintWriter(System.err, true));
    compilerMain.setOptions(Options.instance(context));
    compilerMain.filenames = new LinkedHashSet<File>();
    compilerMain.processArgs(new String[] { "-d", "." });

    JavaCompiler compiler = JavaCompiler.instance(context);
    compiler.compile(List.of(f));
    try {
        compiler.compile(List.of(f));
        throw new Error("Error: AssertionError not thrown after second call of compile");
    } catch (AssertionError e) {
        System.err.println("Exception from compiler (expected): " + e);
    }
}
 

@Test
public void testDirectAccess1() throws Exception {
    JavaFileObject srcFile = createSimpleJavaFileObject();
    Iterable<? extends JavaFileObject> files = Arrays.asList(srcFile);
    Context c = new Context();
    Messager.preRegister(c, "javadoc");
    StandardJavaFileManager fm = new JavacFileManager(c, true, null);
    File outDir = getOutDir();
    fm.setLocation(DocumentationTool.Location.DOCUMENTATION_OUTPUT, Arrays.asList(outDir));
    DocumentationTask t = new JavadocTaskImpl(c, null, null, files);
    if (t.call()) {
        System.err.println("task succeeded");
    } else {
        throw new Exception("task failed");
    }
}
 

/**
 * Setup env by creating pseudo-random collection of names, packages and classes.
 */
void setup() {
    log ("setup");
    context = new Context();
    JavacFileManager.preRegister(context); // required by ClassReader which is required by Symtab
    names = Names.instance(context);       // Name.Table impls tied to an instance of Names
    symtab = Symtab.instance(context);
    int setupCount = rgen.nextInt(MAX_SETUP_COUNT);
    for (int i = 0; i < setupCount; i++) {
        switch (random(SetupKind.values())) {
            case NAMES:
                setupNames();
                break;
            case PACKAGE:
                setupPackage();
                break;
            case CLASS:
                setupClass();
                break;
        }
    }
}
 

public void test4() {
    Context context = new Context();
    DiagnosticCollector<JavaFileObject> diagnostics = new DiagnosticCollector<>();
    context.put(DiagnosticListener.class, diagnostics);
    Options.instance(context).put("allowStringFolding", "false");
    JCTree.JCCompilationUnit unit;
    JavacFileManager fileManager = new JavacFileManager(context, true, UTF_8);
    try {
        fileManager.setLocation(StandardLocation.PLATFORM_CLASS_PATH, ImmutableList.<File>of());
    } catch (IOException e) {
        // impossible
        throw new IOError(e);
    }
    SimpleJavaFileObject source =
            new SimpleJavaFileObject(URI.create("source"), JavaFileObject.Kind.SOURCE) {
                @Override
                public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException {
                    return src;
                }
            };
    Log.instance(context).useSource(source);
    ParserFactory parserFactory = ParserFactory.instance(context);
    Parser parser =
            parserFactory.newParser(
                    src,
        /*keepDocComments=*/ true,
        /*keepEndPos=*/ true,
        /*keepLineMap=*/ true);
    unit = parser.parseCompilationUnit();
    unit.sourcefile = source;
}
 

void run() throws Exception {
    Context c = new Context();
    DiagnosticCollector<JavaFileObject> dc =
        new DiagnosticCollector<JavaFileObject>();
    c.put(DiagnosticListener.class, dc);
    StandardJavaFileManager fm = new JavacFileManager(c, false, null);
    fm.setLocation(StandardLocation.CLASS_PATH,
                   Arrays.asList(new File("DOES_NOT_EXIST.jar")));
    FileObject fo = fm.getFileForInput(StandardLocation.CLASS_PATH,
                                       "p", "C.java");
    System.err.println(fo + "\n" + dc.getDiagnostics());
    if (dc.getDiagnostics().size() > 0)
        throw new Exception("unexpected diagnostics found");
}
 

/**
 * Try to open input stream with given name.
 * Report an error if this fails.
 *
 * @param filename The file name of the input stream to be opened.
 */
public CharSequence readSource(JavaFileObject filename) {
    try {
        inputFiles.add(filename);
        return filename.getCharContent(false);
    } catch (IOException e) {
        log.error("error.reading.file", filename, JavacFileManager.getMessage(e));
        return null;
    }
}
 

protected char[] initBuf(JavaFileObject fileObject) throws IOException {
    char[] buf;
    CharSequence cs = fileObject.getCharContent(true);
    if (cs instanceof CharBuffer) {
        CharBuffer cb = (CharBuffer) cs;
        buf = JavacFileManager.toArray(cb);
        bufLen = cb.limit();
    } else {
        buf = cs.toString().toCharArray();
        bufLen = buf.length;
    }
    refBuf = new SoftReference<char[]>(buf);
    return buf;
}
 

public void test1() {
    Context context = new Context();
    DiagnosticCollector<JavaFileObject> diagnostics = new DiagnosticCollector<>();
    context.put(DiagnosticListener.class, diagnostics);
    Options.instance(context).put("allowStringFolding", "false");
    JCTree.JCCompilationUnit unit;
    JavacFileManager fileManager = new JavacFileManager(context, true, UTF_8);
    try {
        fileManager.setLocation(StandardLocation.PLATFORM_CLASS_PATH, ImmutableList.<File>of());
    } catch (IOException e) {
        // impossible
        throw new IOError(e);
    }
    SimpleJavaFileObject source =
            new SimpleJavaFileObject(URI.create("source"), JavaFileObject.Kind.SOURCE) {
                @Override
                public CharSequence getCharContent(boolean ignoreEncodingErrors) throws IOException {
                    return src;
                }
            };
    Log.instance(context).useSource(source);
    ParserFactory parserFactory = ParserFactory.instance(context);
    Parser parser =
            parserFactory.newParser(
                    src,
        /*keepDocComments=*/ true,
        /*keepEndPos=*/ true,
        /*keepLineMap=*/ true);
    unit = parser.parseCompilationUnit();
    unit.sourcefile = source;
}
 

/**
 * Programmatic interface for main function.
 *
 * @param args The command line parameters.
 */
public int compile(String[] args) {
    Context context = new Context();
    JavacFileManager.preRegister(context); // can't create it until Log has been set up
    int result = compile(args, context);
    if (fileManager instanceof JavacFileManager) {
        // A fresh context was created above, so jfm must be a JavacFileManager
        ((JavacFileManager) fileManager).close();
    }
    return result;
}
 

/**
 * Setup compiler context
 */
void setup() {
    log ("setup");
    context = new Context();
    JavacFileManager.preRegister(context); // required by ClassReader which is required by Symtab
    names = Names.instance(context);       // Name.Table impls tied to an instance of Names
    symtab = Symtab.instance(context);
}
 

public static void main(String[] args) throws IOException {
    List<? extends JavaFileObject> files = Arrays.asList(new SourceFile());
    JavaCompiler tool = ToolProvider.getSystemJavaCompiler();
    JavacTask ct = (JavacTask)tool.getTask(null, null, null, null, null, files);
    Context ctx = new Context();
    JavacFileManager.preRegister(ctx);
    checkImplementationCache(ct.analyze(), Types.instance(ctx));
}
 

void run(PrintWriter out, String... args) throws IOException, ClassFileNotFoundException {
    decodeArgs(args);

    final StandardJavaFileManager fm = new JavacFileManager(new Context(), false, null);
    if (classpath != null)
        fm.setLocation(StandardLocation.CLASS_PATH, classpath);

    ClassFileReader reader = new ClassFileReader(fm);

    Dependencies d = new Dependencies();

    if (regex != null)
        d.setFilter(Dependencies.getRegexFilter(Pattern.compile(regex)));

    if (packageNames.size() > 0)
        d.setFilter(Dependencies.getPackageFilter(packageNames, false));

    SortedRecorder r = new SortedRecorder(reverse);

    d.findAllDependencies(reader, rootClassNames, transitiveClosure, r);

    SortedMap<Location,SortedSet<Dependency>> deps = r.getMap();
    for (Map.Entry<Location, SortedSet<Dependency>> e: deps.entrySet()) {
        out.println(e.getKey());
        for (Dependency dep: e.getValue()) {
            out.println("    " + dep.getTarget());
        }
    }
}
 

void run() throws Exception {
    Context c = new Context();
    DiagnosticCollector<JavaFileObject> dc =
        new DiagnosticCollector<JavaFileObject>();
    c.put(DiagnosticListener.class, dc);
    StandardJavaFileManager fm = new JavacFileManager(c, false, null);
    fm.setLocation(StandardLocation.CLASS_PATH,
                   Arrays.asList(new File("DOES_NOT_EXIST.jar")));
    FileObject fo = fm.getFileForInput(StandardLocation.CLASS_PATH,
                                       "p", "C.java");
    System.err.println(fo + "\n" + dc.getDiagnostics());
    if (dc.getDiagnostics().size() > 0)
        throw new Exception("unexpected diagnostics found");
}
 

JavacFileManager createFileManager(boolean useOptimizedZip, boolean useSymbolFile) {
    Context c = new Context();
    Options options = Options.instance(c);

    options.put("useOptimizedZip", Boolean.toString(useOptimizedZip));

    if (!useSymbolFile) {
        options.put("ignore.symbol.file", "true");
    }
    return new JavacFileManager(c, false, null);
}