org.apache.beehive.controls.runtime.bean.ImplPersistenceDelegate 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.
*
* $Header:$
*/
package org.apache.beehive.controls.runtime.bean;
import java.beans.BeanInfo;
import java.beans.DefaultPersistenceDelegate;
import java.beans.Encoder;
import java.beans.Expression;
import java.beans.IntrospectionException;
import java.beans.Introspector;
import java.beans.PersistenceDelegate;
import java.beans.PropertyDescriptor;
import java.beans.Statement;
import java.beans.XMLEncoder;
import java.util.Set;
import org.apache.beehive.controls.api.ControlException;
/**
* The ImplPersistenceDelegate class supports the XML persistance of Control Implementation
* instances by implementing the java.beans.PersistenceDelegate API, and overriding
* the default persistance algorithm based upon the runtime structure for Controls.
*
*/
public class ImplPersistenceDelegate extends DefaultPersistenceDelegate
{
/**
* PersistenceDelegate.instantiate()
*/
protected Expression instantiate(Object oldInstance, Encoder out)
{
//
// An implementation instance is actually constructed at decode time by calling
// ControlBean.ensureControl on the parent bean. This will create a new impl
// instance and run the impl initializer on it.
//
return new Expression(((XMLEncoder)out).getOwner(), "ensureControl", null);
}
/**
* PersistenceDelegate.initialize()
*/
protected void initialize(Class type, Object oldInstance, Object newInstance, Encoder out)
{
super.initialize(type, oldInstance, newInstance, out);
}
/**
* PersistenceDelegate.writeObject()
*/
public void writeObject(Object oldInstance, Encoder out)
{
super.writeObject(oldInstance, out);
}
}