Exemplo n.º 1
0
  @Override
  public boolean handle(
      AnnotationValues<Synchronized> annotation, JCAnnotation ast, Node annotationNode) {
    Node methodNode = annotationNode.up();

    if (methodNode == null
        || methodNode.getKind() != Kind.METHOD
        || !(methodNode.get() instanceof JCMethodDecl)) {
      annotationNode.addError("@Synchronized is legal only on methods.");
      return true;
    }

    JCMethodDecl method = (JCMethodDecl) methodNode.get();

    if ((method.mods.flags & Flags.ABSTRACT) != 0) {
      annotationNode.addError("@Synchronized is legal only on concrete methods.");
      return true;
    }
    boolean isStatic = (method.mods.flags & Flags.STATIC) != 0;
    String lockName = annotation.getInstance().value();
    boolean autoMake = false;
    if (lockName.length() == 0) {
      autoMake = true;
      lockName = isStatic ? STATIC_LOCK_NAME : INSTANCE_LOCK_NAME;
    }

    TreeMaker maker = methodNode.getTreeMaker();

    if (fieldExists(lockName, methodNode) == MemberExistsResult.NOT_EXISTS) {
      if (!autoMake) {
        annotationNode.addError("The field " + new String(lockName) + " does not exist.");
        return true;
      }
      JCExpression objectType = chainDots(maker, methodNode, "java", "lang", "Object");
      // We use 'new Object[0];' because quite unlike 'new Object();', empty arrays *ARE*
      // serializable!
      JCNewArray newObjectArray =
          maker.NewArray(
              chainDots(maker, methodNode, "java", "lang", "Object"),
              List.<JCExpression>of(maker.Literal(TypeTags.INT, 0)),
              null);
      JCVariableDecl fieldDecl =
          maker.VarDef(
              maker.Modifiers(Flags.FINAL | (isStatic ? Flags.STATIC : 0)),
              methodNode.toName(lockName),
              objectType,
              newObjectArray);
      injectField(methodNode.up(), fieldDecl);
    }

    if (method.body == null) return false;

    JCExpression lockNode = maker.Ident(methodNode.toName(lockName));

    method.body = maker.Block(0, List.<JCStatement>of(maker.Synchronized(lockNode, method.body)));

    methodNode.rebuild();

    return true;
  }
Exemplo n.º 2
0
  @Override
  public void visitMethodDef(JCMethodDecl tree) {
    super.visitMethodDef(tree);
    MethodSymbol meth = tree.sym;
    if (meth == null || meth.kind != Kinds.MTH) return;
    TreePath treePath = docenv.getTreePath(env.toplevel, env.enclClass, tree);
    if (meth.isConstructor()) docenv.makeConstructorDoc(meth, treePath);
    else if (isAnnotationTypeElement(meth)) docenv.makeAnnotationTypeElementDoc(meth, treePath);
    else docenv.makeMethodDoc(meth, treePath);

    // release resources
    tree.body = null;
  }