| career | drupal | java | mac | mysql | perl | scala | uml | unix  

Groovy example source code file (

This example Groovy source code file ( is included in the "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Groovy tags/keywords

closure, closure, conversionhandler, convertedmap, convertedmap, map, map, method, object, object, reflection, string, throwable, unsupportedoperationexception, util

The Groovy source code

 * Copyright 2003-2007 the original author or authors.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.
package org.codehaus.groovy.runtime;

import java.lang.reflect.Method;
import java.util.Map;

import groovy.lang.Closure;

 * This class is a general adapter to adapt a map of closures to
 * any Java interface.
 * <p/>
 * @author <a href="">Jochen Theodorou
public class ConvertedMap extends ConversionHandler {

     * to create a ConvertedMap object.
     * @param closures the map of closures
    protected ConvertedMap(Map closures) {

    public Object invokeCustom(Object proxy, Method method, Object[] args)
            throws Throwable {
        Map m = (Map) getDelegate();
        Closure cl = (Closure) m.get(method.getName());
        if (cl == null) {
            throw new UnsupportedOperationException();

    public String toString() {
        return DefaultGroovyMethods.toString(getDelegate());

    protected boolean checkMethod(Method method) {
        return isCoreObjectMethod(method);

     * Checks whether a method is a core method from java.lang.Object.
     * Such methods often receive special treatment because they are
     * deemed fundamental enough to not be tampered with.
     * call toString() is an exception to allow overriding toString() by a closure specified in the map
     * @param method the method to check
     * @return true if the method is deemed to be a core method
    public static boolean isCoreObjectMethod(Method method) {
        return ConversionHandler.isCoreObjectMethod(method) && !"toString".equals(method.getName());

Other Groovy examples (source code examples)

Here is a short list of links related to this Groovy source code file:

... this post is sponsored by my books ...

#1 New Release!

FP Best Seller


new blog posts


Copyright 1998-2021 Alvin Alexander,
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.