groovy.util.Proxy Maven / Gradle / Ivy
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* distributed with this work for additional information
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* to you 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
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* under the License.
*/
package groovy.util;
import groovy.lang.GroovyObjectSupport;
import groovy.lang.MissingMethodException;
import org.codehaus.groovy.runtime.InvokerHelper;
import java.util.Iterator;
/**
* 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 in 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);
}
}