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Groovy example source code file (Groovy4720Bug.groovy)

This example Groovy source code file (Groovy4720Bug.groovy) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Groovy tags/keywords

class, class, closure, dummy, dummy, dummyapi1, dummyapi1, dummyapi2, dummyapi2, groovy4720bug, groovytestcase

The Groovy Groovy4720Bug.groovy source code

 * Copyright 2003-2011 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
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 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 groovy.bugs

 * Groovy-4720: Method overriding with ExpandoMetaClass is partially broken
 * @author Graeme Rocher
 * @author Guillaume Laforge
class Groovy4720Bug extends GroovyTestCase {

    void testBug() {
        def instanceMethods = [DummyApi1.getMethod('test', java.io.Serializable), DummyApi2.getMethod('test', java.io.Serializable)]

        Dummy.metaClass {
            for (method in instanceMethods) {
                def apiInstance = method.getDeclaringClass().newInstance()
                def methodName = method.name
                def parameterTypes = method.parameterTypes
                if (parameterTypes) {
                    "$methodName"(new Closure(this) {
                        def call(Object[] args) {
                            apiInstance."$methodName"(* args)

                        Class[] getParameterTypes() { parameterTypes }

        assert new Dummy().test(1) == "overrided"

class Dummy {}

class DummyApi1 {
    def test(Serializable id) {
class DummyApi2 {
    def test(Serializable id) {

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