/*
* 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 <a href="mailto:james@coredevelopers.net">James Strachan</a>
*/
public class
Reference<T> 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;
}
}