groovy.lang.Reference Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* 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
* specific language governing permissions and limitations
* under the License.
*/
package groovy.lang;
import org.codehaus.groovy.runtime.InvokerHelper;
import java.io.Serializable;
/**
* Represents a reference to a value
*
* @author James Strachan
*/
public class Reference extends GroovyObjectSupport implements Serializable {
private static final long serialVersionUID = 4963704631487573488L;
private T value;
public Reference() {
}
public Reference(T value) {
this.value = value;
}
public Object getProperty(String property) {
Object value = get();
if (value != null) {
return InvokerHelper.getProperty(value, property);
}
return super.getProperty(property);
}
public void setProperty(String property, Object newValue) {
Object value = get();
if (value != null) {
InvokerHelper.setProperty(value, property, newValue);
}
else {
super.setProperty(property, newValue);
}
}
public Object invokeMethod(String name, Object args) {
Object value = get();
if (value != null) {
try {
return InvokerHelper.invokeMethod(value, name, args);
}
catch (Exception e) {
return super.invokeMethod(name, args);
}
}
else {
return super.invokeMethod(name, args);
}
}
public T get() {
return value;
}
public void set(T value) {
this.value = value;
}
}