groovy.util.Proxy Maven / Gradle / Ivy
/*
* 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
*
* 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,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package groovy.util;
import java.util.Iterator;
import groovy.lang.GroovyObjectSupport;
import groovy.lang.MissingMethodException;
import org.codehaus.groovy.runtime.InvokerHelper;
/**
* Dynamic groovy proxy for another object. All method
* invocations get forwarded to actual object, unless the proxy overrides it.
* See groovy/util/ProxyTest.groovy for usage details.
*
* @author Troy Heninger
* @author Dierk Koenig
*/
public class Proxy extends GroovyObjectSupport {
private Object adaptee = null;
/**
* This method is for convenience.
* It allows to get around the need for defining dump ctors is subclasses.
* See unit tests for details.
*/
public Proxy wrap(Object adaptee){
setAdaptee(adaptee);
return this;
}
public Object getAdaptee() {
return adaptee;
}
public void setAdaptee(Object adaptee) {
this.adaptee = adaptee;
}
public Object invokeMethod(String name, Object args) {
try {
return super.invokeMethod(name, args);
}
catch (MissingMethodException e) {
return InvokerHelper.invokeMethod(adaptee, name, args);
}
}
public Iterator iterator() {
return InvokerHelper.asIterator(adaptee);
}
}