/**
   * This method is used to add "bridge" methods for private methods of an inner/outer class, so
   * that the outer class is capable of calling them. It does basically the same job as access$000
   * like methods in Java.
   *
   * @param node an inner/outer class node for which to generate bridge methods
   */
  @SuppressWarnings("unchecked")
  private void addPrivateBridgeMethods(final ClassNode node) {
    Set<ASTNode> accessedMethods =
        (Set<ASTNode>) node.getNodeMetaData(StaticTypesMarker.PV_METHODS_ACCESS);
    if (accessedMethods == null) return;
    List<MethodNode> methods = new ArrayList<MethodNode>(node.getAllDeclaredMethods());
    Map<MethodNode, MethodNode> privateBridgeMethods =
        (Map<MethodNode, MethodNode>) node.getNodeMetaData(PRIVATE_BRIDGE_METHODS);
    if (privateBridgeMethods != null) {
      // private bridge methods already added
      return;
    }
    privateBridgeMethods = new HashMap<MethodNode, MethodNode>();
    int i = -1;
    final int access = Opcodes.ACC_STATIC | Opcodes.ACC_PUBLIC | Opcodes.ACC_SYNTHETIC;
    for (MethodNode method : methods) {
      if (accessedMethods.contains(method)) {
        i++;
        Parameter[] methodParameters = method.getParameters();
        Parameter[] newParams = new Parameter[methodParameters.length + 1];
        System.arraycopy(methodParameters, 0, newParams, 1, methodParameters.length);
        newParams[0] = new Parameter(node.getPlainNodeReference(), "$that");
        Expression arguments;
        if (method.getParameters() == null || method.getParameters().length == 0) {
          arguments = ArgumentListExpression.EMPTY_ARGUMENTS;
        } else {
          List<Expression> args = new LinkedList<Expression>();
          for (Parameter parameter : methodParameters) {
            args.add(new VariableExpression(parameter));
          }
          arguments = new ArgumentListExpression(args);
        }
        Expression receiver =
            method.isStatic() ? new ClassExpression(node) : new VariableExpression(newParams[0]);
        MethodCallExpression mce = new MethodCallExpression(receiver, method.getName(), arguments);
        mce.setMethodTarget(method);

        ExpressionStatement returnStatement = new ExpressionStatement(mce);
        MethodNode bridge =
            node.addMethod(
                "access$" + i,
                access,
                method.getReturnType(),
                newParams,
                method.getExceptions(),
                returnStatement);
        privateBridgeMethods.put(method, bridge);
        bridge.addAnnotation(new AnnotationNode(COMPILESTATIC_CLASSNODE));
      }
    }
    if (!privateBridgeMethods.isEmpty()) {
      node.setNodeMetaData(PRIVATE_BRIDGE_METHODS, privateBridgeMethods);
    }
  }
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  /**
   * Returns true if the given method has a possibly matching instance method with the given name
   * and arguments.
   *
   * @param name the name of the method of interest
   * @param arguments the arguments to match against
   * @return true if a matching method was found
   */
  public boolean hasPossibleMethod(String name, Expression arguments) {
    int count = 0;

    if (arguments instanceof TupleExpression) {
      TupleExpression tuple = (TupleExpression) arguments;
      // TODO this won't strictly be true when using list expansion in argument calls
      count = tuple.getExpressions().size();
    }
    ClassNode node = this;
    do {
      for (MethodNode method : getMethods(name)) {
        if (method.getParameters().length == count && !method.isStatic()) {
          return true;
        }
      }
      node = node.getSuperClass();
    } while (node != null);
    return false;
  }
  protected Expression transformPropertyExpression(PropertyExpression pe) {
    if (currentMethod != null
        && currentMethod.isStatic()
        && pe.getObjectExpression() instanceof VariableExpression
        && ((VariableExpression) pe.getObjectExpression()).isSuperExpression()) {
      PropertyExpression pexp =
          new PropertyExpression(
              new ClassExpression(currentClass.getSuperClass()), transform(pe.getProperty()));
      pexp.setSourcePosition(pe);
      return pexp;
    }
    boolean oldInPropertyExpression = inPropertyExpression;
    Expression oldFoundArgs = foundArgs;
    Expression oldFoundConstant = foundConstant;
    inPropertyExpression = true;
    foundArgs = null;
    foundConstant = null;
    Expression objectExpression = transform(pe.getObjectExpression());
    boolean candidate = false;
    if (objectExpression instanceof MethodCallExpression) {
      candidate = ((MethodCallExpression) objectExpression).isImplicitThis();
    }

    if (foundArgs != null && foundConstant != null && candidate) {
      Expression result = findStaticMethodImportFromModule(foundConstant, foundArgs);
      if (result != null) {
        objectExpression = result;
        objectExpression.setSourcePosition(pe);
      }
    }
    inPropertyExpression = oldInPropertyExpression;
    foundArgs = oldFoundArgs;
    foundConstant = oldFoundConstant;
    pe.setObjectExpression(objectExpression);
    return pe;
  }
Esempio n. 4
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  /**
   * Returns true if the given method has a possibly matching static method with the given name and
   * arguments.
   *
   * @param name the name of the method of interest
   * @param arguments the arguments to match against
   * @return true if a matching method was found
   */
  public boolean hasPossibleStaticMethod(String name, Expression arguments) {
    int count = 0;

    if (arguments instanceof TupleExpression) {
      TupleExpression tuple = (TupleExpression) arguments;
      // TODO this won't strictly be true when using list expansion in argument calls
      count = tuple.getExpressions().size();
    } else if (arguments instanceof MapExpression) {
      count = 1;
    }

    for (MethodNode method : getMethods(name)) {
      if (method.isStatic()) {
        Parameter[] parameters = method.getParameters();
        if (parameters.length == count) return true;

        // handle varargs case
        if (parameters.length > 0 && parameters[parameters.length - 1].getType().isArray()) {
          if (count >= parameters.length - 1) return true;
        }

        // handle parameters with default values
        int nonDefaultParameters = 0;
        for (Parameter parameter : parameters) {
          if (!parameter.hasInitialExpression()) {
            nonDefaultParameters++;
          }
        }

        if (count < parameters.length && nonDefaultParameters <= count) {
          return true;
        }
      }
    }
    return false;
  }
  private boolean makeGetPropertyWithGetter(
      final Expression receiver,
      final ClassNode receiverType,
      final String methodName,
      final boolean safe,
      final boolean implicitThis) {
    // does a getter exists ?
    String getterName = "get" + MetaClassHelper.capitalize(methodName);
    MethodNode getterNode = receiverType.getGetterMethod(getterName);
    if (getterNode == null) {
      getterName = "is" + MetaClassHelper.capitalize(methodName);
      getterNode = receiverType.getGetterMethod(getterName);
    }
    if (getterNode != null
        && receiver instanceof ClassExpression
        && !CLASS_Type.equals(receiverType)
        && !getterNode.isStatic()) {
      return false;
    }

    // GROOVY-5561: if two files are compiled in the same source unit
    // and that one references the other, the getters for properties have not been
    // generated by the compiler yet (generated by the Verifier)
    PropertyNode propertyNode = receiverType.getProperty(methodName);
    if (propertyNode != null) {
      // it is possible to use a getter
      String prefix = "get";
      if (boolean_TYPE.equals(propertyNode.getOriginType())) {
        prefix = "is";
      }
      getterName = prefix + MetaClassHelper.capitalize(methodName);
      getterNode =
          new MethodNode(
              getterName,
              ACC_PUBLIC,
              propertyNode.getOriginType(),
              Parameter.EMPTY_ARRAY,
              ClassNode.EMPTY_ARRAY,
              EmptyStatement.INSTANCE);
      getterNode.setDeclaringClass(receiverType);
      if (propertyNode.isStatic()) getterNode.setModifiers(ACC_PUBLIC + ACC_STATIC);
    }
    if (getterNode != null) {
      MethodCallExpression call =
          new MethodCallExpression(receiver, getterName, ArgumentListExpression.EMPTY_ARGUMENTS);
      call.setSourcePosition(receiver);
      call.setMethodTarget(getterNode);
      call.setImplicitThis(implicitThis);
      call.setSafe(safe);
      call.visit(controller.getAcg());
      return true;
    }

    if (receiverType instanceof InnerClassNode && !receiverType.isStaticClass()) {
      if (makeGetPropertyWithGetter(
          receiver, receiverType.getOuterClass(), methodName, safe, implicitThis)) {
        return true;
      }
    }

    // go upper level
    ClassNode superClass = receiverType.getSuperClass();
    if (superClass != null) {
      return makeGetPropertyWithGetter(receiver, superClass, methodName, safe, implicitThis);
    }
    return false;
  }
  protected Expression transformMethodCallExpression(MethodCallExpression mce) {
    Expression args = transform(mce.getArguments());
    Expression method = transform(mce.getMethod());
    Expression object = transform(mce.getObjectExpression());
    boolean isExplicitThisOrSuper = false;
    boolean isExplicitSuper = false;
    if (object instanceof VariableExpression) {
      VariableExpression ve = (VariableExpression) object;
      isExplicitThisOrSuper =
          !mce.isImplicitThis() && (ve.isThisExpression() || ve.isSuperExpression());
      isExplicitSuper = ve.isSuperExpression();
    }

    if (mce.isImplicitThis() || isExplicitThisOrSuper) {
      if (mce.isImplicitThis()) {
        Expression ret = findStaticMethodImportFromModule(method, args);
        if (ret != null) {
          setSourcePosition(ret, mce);
          return ret;
        }
        if (method instanceof ConstantExpression && !inLeftExpression) {
          // could be a closure field
          String methodName = (String) ((ConstantExpression) method).getValue();
          ret = findStaticFieldOrPropAccessorImportFromModule(methodName);
          if (ret != null) {
            ret = new MethodCallExpression(ret, "call", args);
            setSourcePosition(ret, mce);
            return ret;
          }
        }
      } else if (currentMethod != null && currentMethod.isStatic() && isExplicitSuper) {
        MethodCallExpression ret =
            new MethodCallExpression(
                new ClassExpression(currentClass.getSuperClass()), method, args);
        setSourcePosition(ret, mce);
        return ret;
      }

      if (method instanceof ConstantExpression) {
        ConstantExpression ce = (ConstantExpression) method;
        Object value = ce.getValue();
        if (value instanceof String) {
          String methodName = (String) value;
          boolean lookForPossibleStaticMethod = !methodName.equals("call");
          if (currentMethod != null && !currentMethod.isStatic()) {
            if (currentClass.hasPossibleMethod(methodName, args)) {
              lookForPossibleStaticMethod = false;
            }
          }
          if (!inClosure
              && (inSpecialConstructorCall
                  || (lookForPossibleStaticMethod
                      && currentClass.hasPossibleStaticMethod(methodName, args)))) {
            StaticMethodCallExpression smce =
                new StaticMethodCallExpression(currentClass, methodName, args);
            setSourcePosition(smce, mce);
            return smce;
          }
        }
      }
    }

    MethodCallExpression result = new MethodCallExpression(object, method, args);
    result.setSafe(mce.isSafe());
    result.setImplicitThis(mce.isImplicitThis());
    result.setSpreadSafe(mce.isSpreadSafe());
    result.setMethodTarget(mce.getMethodTarget());
    // GROOVY-6757
    result.setGenericsTypes(mce.getGenericsTypes());
    setSourcePosition(result, mce);
    return result;
  }
  protected Expression transformMethodCallExpression(MethodCallExpression mce) {
    Expression args = transform(mce.getArguments());
    Expression method = transform(mce.getMethod());
    Expression object = transform(mce.getObjectExpression());
    boolean isExplicitThisOrSuper = false;
    if (object instanceof VariableExpression) {
      VariableExpression ve = (VariableExpression) object;
      isExplicitThisOrSuper =
          !mce.isImplicitThis() && (ve.getName().equals("this") || ve.getName().equals("super"));
    }

    if (mce.isImplicitThis() || isExplicitThisOrSuper) {
      if (mce.isImplicitThis()) {
        Expression ret = findStaticMethodImportFromModule(method, args);
        if (ret != null) {
          // GRECLIPSE add
          if (!((StaticMethodCallExpression) ret).getMethod().equals(method.getText())) {
            // store the identifier to facilitate organizing static imports
            ret.setNodeMetaData("static.import.alias", method.getText());
          }
          // GRECLIPSE end
          setSourcePosition(ret, mce);
          return ret;
        }
        if (method instanceof ConstantExpression && !inLeftExpression) {
          // could be a closure field
          String methodName = (String) ((ConstantExpression) method).getValue();
          ret = findStaticFieldOrPropAccessorImportFromModule(methodName);
          if (ret != null) {
            ret = new MethodCallExpression(ret, "call", args);
            setSourcePosition(ret, mce);
            return ret;
          }
        }
      }

      if (method instanceof ConstantExpression) {
        ConstantExpression ce = (ConstantExpression) method;
        Object value = ce.getValue();
        if (value instanceof String) {
          String methodName = (String) value;
          boolean lookForPossibleStaticMethod = !methodName.equals("call");
          if (currentMethod != null && !currentMethod.isStatic()) {
            if (currentClass.hasPossibleMethod(methodName, args)) {
              lookForPossibleStaticMethod = false;
            }
          }
          if (inSpecialConstructorCall
              || (lookForPossibleStaticMethod
                  && currentClass.hasPossibleStaticMethod(methodName, args))) {
            StaticMethodCallExpression smce =
                new StaticMethodCallExpression(currentClass, methodName, args);
            setSourcePosition(smce, mce);
            return smce;
          }
        }
      }
    }

    MethodCallExpression result = new MethodCallExpression(object, method, args);
    result.setSafe(mce.isSafe());
    result.setImplicitThis(mce.isImplicitThis());
    result.setSpreadSafe(mce.isSpreadSafe());
    result.setMethodTarget(mce.getMethodTarget());
    // GROOVY-6757
    result.setGenericsTypes(mce.getGenericsTypes());
    setSourcePosition(result, mce);
    return result;
  }