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Java > Open Source Codes > org > objectstyle > cayenne > client > ClientObjectContextMergeHandler


1 /* ====================================================================
2  *
3  * The ObjectStyle Group Software License, version 1.1
4  * ObjectStyle Group - http://objectstyle.org/
5  *
6  * Copyright (c) 2002-2005, Andrei (Andrus) Adamchik and individual authors
7  * of the software. All rights reserved.
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9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
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13  * 1. Redistributions of source code must retain the above copyright
14  * notice, this list of conditions and the following disclaimer.
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16  * 2. Redistributions in binary form must reproduce the above copyright
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19  * distribution.
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21  * 3. The end-user documentation included with the redistribution, if any,
22  * must include the following acknowlegement:
23  * "This product includes software developed by independent contributors
24  * and hosted on ObjectStyle Group web site (http://objectstyle.org/)."
25  * Alternately, this acknowlegement may appear in the software itself,
26  * if and wherever such third-party acknowlegements normally appear.
27  *
28  * 4. The names "ObjectStyle Group" and "Cayenne" must not be used to endorse
29  * or promote products derived from this software without prior written
30  * permission. For written permission, email
31  * "andrus at objectstyle dot org".
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33  * 5. Products derived from this software may not be called "ObjectStyle"
34  * or "Cayenne", nor may "ObjectStyle" or "Cayenne" appear in their
35  * names without prior written permission.
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37  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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48  * SUCH DAMAGE.
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51  * This software consists of voluntary contributions made by many
52  * individuals and hosted on ObjectStyle Group web site. For more
53  * information on the ObjectStyle Group, please see
54  * <http://objectstyle.org/>.
55  */
56 package org.objectstyle.cayenne.client;
57
58 import org.objectstyle.cayenne.Persistent;
59 import org.objectstyle.cayenne.graph.BeanMergeHandler;
60 import org.objectstyle.cayenne.graph.GraphMap;
61
62 /**
63  * A GraphChangeHandler that injects external graph changes to an ObjectContext.
64  *
65  * @since 1.2
66  * @author Andrus Adamchik
67  */
68 class ClientObjectContextMergeHandler extends BeanMergeHandler {
69
70     ClientStateRecorder stateRecorder;
71
72     ClientObjectContextMergeHandler(ClientStateRecorder stateRecorder, GraphMap graphMap) {
73         super(graphMap);
74
75         this.stateRecorder = stateRecorder;
76     }
77
78     public void nodeIdChanged(Object JavaDoc nodeId, Object JavaDoc newId) {
79         Object JavaDoc node = graphMap.unregisterNode(nodeId);
80
81         if (node != null) {
82             graphMap.registerNode(newId, node);
83
84             if (node instanceof Persistent) {
85                 // inject new id
86 ((Persistent) node).setOid(newId);
87             }
88
89             // notify state recorder
90 stateRecorder.nodeIdChanged(nodeId, newId);
91         }
92     }
93 }
94
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