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1   package org.apache.commons.jcs.utils.serialization;
2   
3   /*
4    * Licensed to the Apache Software Foundation (ASF) under one
5    * or more contributor license agreements.  See the NOTICE file
6    * distributed with this work for additional information
7    * regarding copyright ownership.  The ASF licenses this file
8    * to you under the Apache License, Version 2.0 (the
9    * "License"); you may not use this file except in compliance
10   * with the License.  You may obtain a copy of the License at
11   *
12   *   http://www.apache.org/licenses/LICENSE-2.0
13   *
14   * Unless required by applicable law or agreed to in writing,
15   * software distributed under the License is distributed on an
16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17   * KIND, either express or implied.  See the License for the
18   * specific language governing permissions and limitations
19   * under the License.
20   */
21  
22  import org.apache.commons.jcs.engine.behavior.IElementSerializer;
23  import org.apache.commons.jcs.io.ObjectInputStreamClassLoaderAware;
24  
25  import java.io.BufferedInputStream;
26  import java.io.ByteArrayInputStream;
27  import java.io.ByteArrayOutputStream;
28  import java.io.IOException;
29  import java.io.ObjectInputStream;
30  import java.io.ObjectOutputStream;
31  
32  /**
33   * Performs default serialization and de-serialization.
34   * <p>
35   * @author Aaron Smuts
36   */
37  public class StandardSerializer
38      implements IElementSerializer
39  {
40      /**
41       * Serializes an object using default serialization.
42       * <p>
43       * @param obj
44       * @return byte[]
45       * @throws IOException
46       */
47      @Override
48      public <T> byte[] serialize( T obj )
49          throws IOException
50      {
51          ByteArrayOutputStream baos = new ByteArrayOutputStream();
52          ObjectOutputStream oos = new ObjectOutputStream( baos );
53          try
54          {
55              oos.writeObject( obj );
56          }
57          finally
58          {
59              oos.close();
60          }
61          return baos.toByteArray();
62      }
63  
64      /**
65       * Uses default de-serialization to turn a byte array into an object. All exceptions are
66       * converted into IOExceptions.
67       * <p>
68       * @param data
69       * @return Object
70       * @throws IOException
71       * @throws ClassNotFoundException
72       */
73      @Override
74      public <T> T deSerialize( byte[] data, ClassLoader loader )
75          throws IOException, ClassNotFoundException
76      {
77          ByteArrayInputStream bais = new ByteArrayInputStream( data );
78          BufferedInputStream bis = new BufferedInputStream( bais );
79          ObjectInputStream ois = new ObjectInputStreamClassLoaderAware( bis, loader );
80          try
81          {
82              @SuppressWarnings("unchecked") // Need to cast from Object
83              T readObject = (T) ois.readObject();
84              return readObject;
85          }
86          finally
87          {
88              ois.close();
89          }
90      }
91  }