Examples with JavaCompiler javax.tools.JavaCompiler used on opensource projects

Example 11 with JavaCompiler

use of javax.tools.JavaCompiler in project zoj by licheng.

the class CustomJavaCompiler method main.

public static void main(String[] args) {
    if (args.length != 1) {
        System.err.println("Invalid arg length " + args.length);
        System.exit(-1);
    }
    JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
    StandardJavaFileManager stdFileManager = compiler.getStandardFileManager(null, null, null);
    JavaFileManager fileManager = new CustomJavaFileManager(stdFileManager);
    System.out.println(new File(args[0]).getAbsolutePath());
    System.out.println(compiler.getTask(null, fileManager, null, null, null, stdFileManager.getJavaFileObjects(args[0])).call());
}

Example 12 with JavaCompiler

use of javax.tools.JavaCompiler in project javapoet by square.

the class FileReadingTest method compileJavaFile.

@Test
public void compileJavaFile() throws Exception {
    final String value = "Hello World!";
    TypeSpec type = TypeSpec.classBuilder("Test").addModifiers(Modifier.PUBLIC).addSuperinterface(ParameterizedTypeName.get(Callable.class, String.class)).addMethod(MethodSpec.methodBuilder("call").returns(String.class).addModifiers(Modifier.PUBLIC).addStatement("return $S", value).build()).build();
    JavaFile javaFile = JavaFile.builder("foo", type).build();
    JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
    DiagnosticCollector<JavaFileObject> diagnosticCollector = new DiagnosticCollector<>();
    StandardJavaFileManager fileManager = compiler.getStandardFileManager(diagnosticCollector, Locale.getDefault(), UTF_8);
    fileManager.setLocation(StandardLocation.CLASS_OUTPUT, Collections.singleton(temporaryFolder.newFolder()));
    CompilationTask task = compiler.getTask(null, fileManager, diagnosticCollector, Collections.<String>emptySet(), Collections.<String>emptySet(), Collections.singleton(javaFile.toJavaFileObject()));
    assertThat(task.call()).isTrue();
    assertThat(diagnosticCollector.getDiagnostics()).isEmpty();
    ClassLoader loader = fileManager.getClassLoader(StandardLocation.CLASS_OUTPUT);
    Callable<?> test = Class.forName("foo.Test", true, loader).asSubclass(Callable.class).newInstance();
    assertThat(Callable.class.getMethod("call").invoke(test)).isEqualTo(value);
}

Example 13 with JavaCompiler

use of javax.tools.JavaCompiler in project bazel by bazelbuild.

the class BazelJavaCompiler method newInstance.

private static JavaCompiler newInstance(final JavaCompiler delegate) {
    // We forward most operations to the JavaCompiler implementation in langtools.jar.
    return new JavaCompiler() {

        @Override
        public CompilationTask getTask(Writer out, JavaFileManager fileManager, DiagnosticListener<? super JavaFileObject> diagnosticListener, Iterable<String> options, Iterable<String> classes, Iterable<? extends JavaFileObject> compilationUnits) {
            // We prepend bazel's default javacopts to user javacopts,
            // so that the user can override them. javac supports this
            // "last option wins" style of option override.
            ImmutableList.Builder<String> fullOptions = ImmutableList.builder();
            fullOptions.addAll(getDefaultJavacopts());
            if (options != null) {
                fullOptions.addAll(options);
            }
            return delegate.getTask(out, fileManager, diagnosticListener, fullOptions.build(), classes, compilationUnits);
        }

        @Override
        public StandardJavaFileManager getStandardFileManager(DiagnosticListener<? super JavaFileObject> diagnosticListener, Locale locale, Charset charset) {
            StandardJavaFileManager fileManager = delegate.getStandardFileManager(diagnosticListener, locale, charset);
            try {
                fileManager.setLocation(// bootclasspath
                StandardLocation.PLATFORM_CLASS_PATH, JavacBootclasspath.asFiles());
            } catch (IOException e) {
                // Should never happen, according to javadocs for setLocation
                throw new RuntimeException(e);
            }
            return fileManager;
        }

        @Override
        public int run(InputStream in, OutputStream out, OutputStream err, String... arguments) {
            // prepend bazel's default javacopts to user arguments
            List<String> args = ImmutableList.<String>builder().addAll(getDefaultJavacopts()).add(arguments).build();
            return delegate.run(in, out, err, args.toArray(new String[0]));
        }

        @Override
        public Set<SourceVersion> getSourceVersions() {
            return delegate.getSourceVersions();
        }

        @Override
        public int isSupportedOption(String option) {
            return delegate.isSupportedOption(option);
        }
    };
}

Example 14 with JavaCompiler

use of javax.tools.JavaCompiler in project bazel by bazelbuild.

the class BazelJavaCompilerTest method assertCompileSucceeds.

private void assertCompileSucceeds(final String uri, final String content) throws Exception {
    JavaCompiler javac = BazelJavaCompiler.newInstance();
    JavaFileObject source = new SimpleJavaFileObject(URI.create(uri), JavaFileObject.Kind.SOURCE) {

        @Override
        public CharSequence getCharContent(boolean ignoreEncodingErrors) {
            return content;
        }
    };
    StandardJavaFileManager fileManager = javac.getStandardFileManager(null, null, null);
    // setting the output path by passing a flag to getTask is not reliable
    fileManager.setLocation(StandardLocation.CLASS_OUTPUT, Arrays.asList(getTmpDir()));
    DiagnosticCollector<JavaFileObject> messages = new DiagnosticCollector<>();
    JavaCompiler.CompilationTask task = javac.getTask(null, fileManager, messages, null, null, Collections.singletonList(source));
    assertTrue(task.call());
    assertTrue(messages.getDiagnostics().isEmpty());
}

Example 15 with JavaCompiler

use of javax.tools.JavaCompiler in project bazel by bazelbuild.

the class BazelJavaCompilerTest method testCompilerNewInstance.

@Test
public void testCompilerNewInstance() throws Exception {
    JavaCompiler javac = BazelJavaCompiler.newInstance();
    assertNotNull(javac.getStandardFileManager(null, null, null));
    // This is a simplified pattern of invoking the compiler API. Note, however, that
    // many examples cast to JavacTask or JavacTaskImpl and invoke the phases separately.
    // Currently, either cast will fail with something that looks like classloader issues:
    // "com.sun.tools.javac.api.JavacTask cannot be cast to com.sun.tools.javac.api.JavacTask"
    assertNotNull(javac.getTask(null, null, null, null, null, null));
}