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Java > Open Source Codes > org > apache > ojb > otm > copy > SerializeObjectCopyStrategy


1 package org.apache.ojb.otm.copy;
2
3 /* Copyright 2003-2005 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.*;
19 import org.apache.ojb.broker.PersistenceBroker;
20
21 /**
22  * Does in-memory serialization to achieve a copy of the object graph.
23  *
24  * @author matthew.baird
25  * @see ObjectCopyStrategy
26  */
27 public final class SerializeObjectCopyStrategy implements ObjectCopyStrategy
28 {
29     /**
30      * This implementation will probably be slower than the metadata
31      * object copy, but this was easier to implement.
32      * @see org.apache.ojb.otm.copy.ObjectCopyStrategy#copy(Object)
33      */
34     public Object JavaDoc copy(final Object JavaDoc obj, PersistenceBroker broker)
35             throws ObjectCopyException
36     {
37         ObjectOutputStream oos = null;
38         ObjectInputStream ois = null;
39         try
40         {
41             final ByteArrayOutputStream bos = new ByteArrayOutputStream();
42             oos = new ObjectOutputStream(bos);
43             // serialize and pass the object
44 oos.writeObject(obj);
45             oos.flush();
46             final ByteArrayInputStream bin =
47                     new ByteArrayInputStream(bos.toByteArray());
48             ois = new ObjectInputStream(bin);
49             // return the new object
50 return ois.readObject();
51         }
52         catch (Exception JavaDoc e)
53         {
54             throw new ObjectCopyException(e);
55         }
56         finally
57         {
58             try
59             {
60                 if (oos != null)
61                 {
62                     oos.close();
63                 }
64                 if (ois != null)
65                 {
66                     ois.close();
67                 }
68             }
69             catch (IOException ioe)
70             {
71                 // ignore
72 }
73         }
74     }
75 }
76
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