01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: *
17: * $Header:$
18: */
19: package org.apache.beehive.controls.runtime.bean;
20:
21: import java.beans.BeanInfo;
22: import java.beans.DefaultPersistenceDelegate;
23: import java.beans.Encoder;
24: import java.beans.Expression;
25: import java.beans.IntrospectionException;
26: import java.beans.Introspector;
27: import java.beans.PersistenceDelegate;
28: import java.beans.PropertyDescriptor;
29: import java.beans.Statement;
30: import java.beans.XMLEncoder;
31: import java.util.Set;
32:
33: import org.apache.beehive.controls.api.ControlException;
34:
35: /**
36: * The ImplPersistenceDelegate class supports the XML persistance of Control Implementation
37: * instances by implementing the <code>java.beans.PersistenceDelegate</b> API, and overriding
38: * the default persistance algorithm based upon the runtime structure for Controls.
39: * <p>
40: */
41: public class ImplPersistenceDelegate extends DefaultPersistenceDelegate {
42: /**
43: * PersistenceDelegate.instantiate()
44: */
45: protected Expression instantiate(Object oldInstance, Encoder out) {
46: //
47: // An implementation instance is actually constructed at decode time by calling
48: // ControlBean.ensureControl on the parent bean. This will create a new impl
49: // instance and run the impl initializer on it.
50: //
51: return new Expression(((XMLEncoder) out).getOwner(),
52: "ensureControl", null);
53: }
54:
55: /**
56: * PersistenceDelegate.initialize()
57: */
58: protected void initialize(Class<?> type, Object oldInstance,
59: Object newInstance, Encoder out) {
60: super .initialize(type, oldInstance, newInstance, out);
61: }
62:
63: /**
64: * PersistenceDelegate.writeObject()
65: */
66: public void writeObject(Object oldInstance, Encoder out) {
67: super.writeObject(oldInstance, out);
68: }
69: }
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