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Java > Open Source Codes > org > apache > ojb > broker > core > proxy > OJBSerializableProxy


1 package org.apache.ojb.broker.core.proxy;
2
3 /* Copyright 2002-2005 The Apache Software Foundation
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at
8  *
9  * 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
18 import java.io.ObjectStreamException JavaDoc;
19 import java.io.Serializable JavaDoc;
20
21 import org.apache.ojb.broker.util.logging.Logger;
22 import org.apache.ojb.broker.util.logging.LoggerFactory;
23
24 /**
25  * @author andrew.clute
26  * Simple class that is serializable, and containes references to an IndirectionHandler
27  * and the base class. When the object is unserialized, it then generates a new Proxy
28  * back in it's place.
29  *
30  */
31 public class OJBSerializableProxy implements Serializable JavaDoc
32 {
33
34     private static final long serialVersionUID = 568312334450175549L;
35     private Logger logger = LoggerFactory.getLogger(OJBSerializableProxy.class);
36
37     private Class JavaDoc classObject;
38
39     private IndirectionHandler indirectionHandler;
40
41     public OJBSerializableProxy(Class JavaDoc proxyClass, IndirectionHandler indirectionHandler)
42     {
43         this.classObject = proxyClass;
44         this.indirectionHandler = indirectionHandler;
45     }
46
47     private Object JavaDoc readResolve() throws ObjectStreamException JavaDoc
48     {
49         try
50         {
51             return ProxyHelper.getProxyFactory().createProxy(classObject, indirectionHandler);
52         } catch (Throwable JavaDoc e)
53         {
54             //Fail gracefully -- there a bunch of reasons why we cannot create the Proxy, and
55 //so we just want to put a null into the reference.
56 logger.warn("Unable to create a new Proxy of type '" + classObject.getName() + "' due to a '" + e.getClass().getName() + "'.");
57             return null;
58         }
59     }
60
61 }
62
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