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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

groovyobject, groovyobject, groovyobjectsupport, groovyobjectsupport, metaclass, metaclass, object, object

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 groovy.lang;

import org.codehaus.groovy.runtime.InvokerHelper;

 * A useful base class for Java objects wishing to be Groovy objects
 * @author <a href="">James Strachan
 * @version $Revision: 20587 $
public abstract class GroovyObjectSupport implements GroovyObject {

    // never persist the MetaClass
    private transient MetaClass metaClass;

    public GroovyObjectSupport() {
        this.metaClass = InvokerHelper.getMetaClass(this.getClass());

    public Object getProperty(String property) {
        return getMetaClass().getProperty(this, property);

    public void setProperty(String property, Object newValue) {
        getMetaClass().setProperty(this, property, newValue);

    public Object invokeMethod(String name, Object args) {
        return getMetaClass().invokeMethod(this, name, args);

    public MetaClass getMetaClass() {
        if (metaClass == null) {
            metaClass = InvokerHelper.getMetaClass(getClass());
        return metaClass;

    public void setMetaClass(MetaClass metaClass) {
        this.metaClass = metaClass;

Other Groovy examples (source code examples)

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