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Groovy example source code file (Wrapper.java)

This example Groovy source code file (Wrapper.java) 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, groovyobject, metaclass, metaclass, object, object, wrapper, wrapper

The Groovy Wrapper.java source code

 * Copyright 2003-2010 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 org.codehaus.groovy.runtime.wrappers;

import groovy.lang.GroovyObject;
import groovy.lang.MetaClass;

 * @author John Wilson
public abstract class Wrapper implements GroovyObject {
    protected final Class constrainedType;

    public Wrapper(final Class constrainedType) {
        this.constrainedType = constrainedType;

    /* (non-Javadoc)
    * @see groovy.lang.GroovyObject#getMetaClass()
    public MetaClass getMetaClass() {
        return getDelegatedMetaClass();

    public Class getType() {
        return this.constrainedType;

    public abstract Object unwrap();

    protected abstract Object getWrapped();

    protected abstract MetaClass getDelegatedMetaClass();

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