KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > org > jboss > util > Conversion


1 /*
2 * JBoss, Home of Professional Open Source
3 * Copyright 2005, JBoss Inc., and individual contributors as indicated
4 * by the @authors tag. See the copyright.txt in the distribution for a
5 * full listing of individual contributors.
6 *
7 * This is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU Lesser General Public License as
9 * published by the Free Software Foundation; either version 2.1 of
10 * the License, or (at your option) any later version.
11 *
12 * This software is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this software; if not, write to the Free
19 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21 */
22 package org.jboss.util;
23
24 import java.io.ByteArrayInputStream JavaDoc;
25 import java.io.ByteArrayOutputStream JavaDoc;
26 import java.io.ObjectInputStream JavaDoc;
27 import java.io.ObjectOutputStream JavaDoc;
28 import java.io.IOException JavaDoc;
29
30 import org.jboss.util.stream.CustomObjectInputStreamWithClassloader;
31 import org.jboss.util.stream.CustomObjectOutputStream;
32
33 /**
34  * @author <a HREF="mailto:reverbel@ime.usp.br">Francisco Reverbel</a>
35  * @version $Revision: 37459 $
36  */
37 public class Conversion
38 {
39    /**
40     * Receives an object and converts it into a byte array. Used to embed
41     * a JBoss oid into the "reference data" (object id) field of a CORBA
42     * reference.
43     */
44    public static byte[] toByteArray(Object JavaDoc obj)
45    {
46       try {
47          ByteArrayOutputStream JavaDoc os = new ByteArrayOutputStream JavaDoc();
48          ObjectOutputStream JavaDoc oos = new CustomObjectOutputStream(os);
49
50          oos.writeObject(obj);
51          oos.flush();
52          byte[] a = os.toByteArray();
53          os.close();
54          return a;
55       }
56       catch (IOException JavaDoc ioe) {
57          throw new RuntimeException JavaDoc("Object id serialization error:\n" + ioe);
58       }
59    }
60
61    /**
62     * Receives a classloader and a byte array previously returned by a call to
63     * <code>toByteArray</code> and retrieves an object from it. Used to
64     * extract a JBoss oid from the "reference data" (object id) field of a
65     * CORBA reference.
66     */
67    public static Object JavaDoc toObject(byte[] a, ClassLoader JavaDoc cl)
68          throws IOException JavaDoc, ClassNotFoundException JavaDoc
69    {
70       ByteArrayInputStream JavaDoc is = new ByteArrayInputStream JavaDoc(a);
71       ObjectInputStream JavaDoc ois =
72      new CustomObjectInputStreamWithClassloader(is, cl);
73       Object JavaDoc obj = ois.readObject();
74       is.close();
75       return obj;
76    }
77
78    /**
79     * Receives a byte array previously returned by a call to
80     * <code>toByteArray</code> and retrieves an object from it. Used to
81     * extract a JBoss oid from the "reference data" (object id) field of a
82     * CORBA reference.
83     */
84    public static Object JavaDoc toObject(byte[] a)
85          throws IOException JavaDoc, ClassNotFoundException JavaDoc
86    {
87       return toObject(a, Thread.currentThread().getContextClassLoader());
88    }
89
90 }
91
Popular Tags