CJDBCStream


1   /**
2    * C-JDBC: Clustered JDBC.
3    * Copyright (C) 2002-2005 French National Institute For Research In Computer
4    * Science And Control (INRIA).
5    * Contact: c-jdbc@objectweb.org
6    * 
7    * This library is free software; you can redistribute it and/or modify it
8    * under the terms of the GNU Lesser General Public License as published by the
9    * Free Software Foundation; either version 2.1 of the License, or any later
10   * version.
11   * 
12   * This library is distributed in the hope that it will be useful, but WITHOUT
13   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14   * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
15   * for more details.
16   * 
17   * You should have received a copy of the GNU Lesser General Public License
18   * along with this library; if not, write to the Free Software Foundation,
19   * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
20   *
21   * Initial developer(s): Nicolas Modrzyk
22   * Contributor(s): Emmanuel Cecchet.
23   */
24  
25  package org.objectweb.cjdbc.common.stream;
26  
27  import java.io.ByteArrayOutputStream  ;
28  import java.io.IOException  ;
29  import java.io.ObjectOutputStream  ;
30  
31  /**
32   * This is a useful stream class to compress and decompress object to a stream.
33   * 
34   * @author <a HREF="mailto:Nicolas.Modrzyk@inrialpes.fr">Nicolas Modrzyk </a>
35   * @author <a HREF="mailto:Emmanuel.Cecchet@inria.fr">Emmanuel Cecchet </a>
36   */
37  public class CJDBCStream
38  {
39  
40    /** @see CJDBCOutputStream#writeUTF(String) */
41    static final int        STRING_CHUNK_SIZE = 64000/3;
42  
43    /**
44     * Statistic method to count the number of bytes of a class.
45     * 
46     * @param obj to count bytes
47     * @return the number of bytes
48     * @throws IOException if fails to read
49     */
50    public static final int countBytes(Object   obj) throws IOException  
51    {
52      ByteArrayOutputStream   bos = new ByteArrayOutputStream  ();
53      ObjectOutputStream   oos = new ObjectOutputStream  (bos);
54      oos.writeObject(obj);
55      oos.flush();
56      oos.close();
57      bos.close();
58      return bos.size();
59    }
60  
61  }
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