package org.apache.ojb.otm.copy;

 /* Copyright 2003-2005 The Apache Software Foundation

  *

  * Licensed 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.

  */

 import java.io.*;

 import org.apache.ojb.broker.PersistenceBroker;

 /**

  * Does in-memory serialization to achieve a copy of the object graph.

  *

  * @author matthew.baird

  * @see ObjectCopyStrategy

  */

 public final class SerializeObjectCopyStrategy implements ObjectCopyStrategy

 {

         /**

          * This implementation will probably be slower than the metadata

          * object copy, but this was easier to implement.

          * @see org.apache.ojb.otm.copy.ObjectCopyStrategy#copy(Object)

          */

         public Object copy(final Object obj, PersistenceBroker broker)

                         throws ObjectCopyException

         {

                 ObjectOutputStream oos = null;

                 ObjectInputStream ois = null;

                 try

                 {

                         final ByteArrayOutputStream bos = new ByteArrayOutputStream();

                         oos = new ObjectOutputStream(bos);

                         // serialize and pass the object

                         oos.writeObject(obj);

                         oos.flush();

                         final ByteArrayInputStream bin =

                                         new ByteArrayInputStream(bos.toByteArray());

                         ois = new ObjectInputStream(bin);

                         // return the new object

                         return ois.readObject();

                 }

                 catch (Exception e)

                 {

                         throw new ObjectCopyException(e);

                 }

                 finally

                 {

                         try

                         {

                                 if (oos != null)

                                 {

                                         oos.close();

                                 }

                                 if (ois != null)

                                 {

                                         ois.close();

                                 }

                         }

                         catch (IOException ioe)

                         {

                                 // ignore

                         }

                 }

         }

 }