1 /***
2 * Redistribution and use of this software and associated documentation
3 * ("Software"), with or without modification, are permitted provided
4 * that the following conditions are met:
5 *
6 * 1. Redistributions of source code must retain copyright
7 * statements and notices. Redistributions must also contain a
8 * copy of this document.
9 *
10 * 2. Redistributions in binary form must reproduce the
11 * above copyright notice, this list of conditions and the
12 * following disclaimer in the documentation and/or other
13 * materials provided with the distribution.
14 *
15 * 3. The name "Exolab" must not be used to endorse or promote
16 * products derived from this Software without prior written
17 * permission of Exoffice Technologies. For written permission,
18 * please contact info@exolab.org.
19 *
20 * 4. Products derived from this Software may not be called "Exolab"
21 * nor may "Exolab" appear in their names without prior written
22 * permission of Exoffice Technologies. Exolab is a registered
23 * trademark of Exoffice Technologies.
24 *
25 * 5. Due credit should be given to the Exolab Project
26 * (http://www.exolab.org/).
27 *
28 * THIS SOFTWARE IS PROVIDED BY EXOFFICE TECHNOLOGIES AND CONTRIBUTORS
29 * ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
30 * NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
31 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
32 * EXOFFICE TECHNOLOGIES OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
33 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
34 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
35 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
36 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
37 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
38 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
39 * OF THE POSSIBILITY OF SUCH DAMAGE.
40 *
41 * Copyright 2003-2004 (C) Exoffice Technologies Inc. All Rights Reserved.
42 *
43 * $Id: SerializationHelper.java,v 1.1 2004/11/26 01:51:06 tanderson Exp $
44 */
45 package org.exolab.jms.net.util;
46
47 import java.io.IOException;
48 import java.io.ObjectInput;
49 import java.io.ObjectOutput;
50
51
52 /***
53 * Helper class for serializing and deserializing objects efficiently
54 *
55 * @author <a href="mailto:tma@netspace.net.au">Tim Anderson</a>
56 * @version $Revision: 1.1 $ $Date: 2004/11/26 01:51:06 $
57 * @see Delegate
58 */
59 public final class SerializationHelper {
60
61 /***
62 * Prevent construction of helper class
63 */
64 private SerializationHelper() {
65 }
66
67 /***
68 * Write an object of the specified type to a stream
69 *
70 * @param type the type of the object
71 * @param object the object to write
72 * @param out the stream to write to
73 * @throws IOException if the object can't be written
74 */
75 public static void write(Class type, Object object, ObjectOutput out)
76 throws IOException {
77
78 if (type.isPrimitive()) {
79 if (type == boolean.class) {
80 out.writeBoolean(((Boolean) object).booleanValue());
81 } else if (type == byte.class) {
82 out.writeByte(((Byte) object).byteValue());
83 } else if (type == char.class) {
84 out.writeChar(((Character) object).charValue());
85 } else if (type == short.class) {
86 out.writeShort(((Short) object).shortValue());
87 } else if (type == int.class) {
88 out.writeInt(((Integer) object).intValue());
89 } else if (type == long.class) {
90 out.writeLong(((Long) object).longValue());
91 } else if (type == float.class) {
92 out.writeFloat(((Float) object).floatValue());
93 } else if (type == double.class) {
94 out.writeDouble(((Double) object).doubleValue());
95 } else {
96 throw new IOException("Unsupported primitive type: " + type);
97 }
98 } else {
99 out.writeObject(object);
100 }
101 }
102
103 /***
104 * Read an object of the specified type from a stream
105 *
106 * @param type the type of the object
107 * @param in the stream to read from
108 * @return the deserialized object
109 * @throws ClassNotFoundException if the class for a serialized object
110 * cannot be found
111 * @throws IOException if the object can't be read
112 */
113 public static Object read(Class type, ObjectInput in)
114 throws ClassNotFoundException, IOException {
115 Object result;
116 if (type.isPrimitive()) {
117 if (type == boolean.class) {
118 result = new Boolean(in.readBoolean());
119 } else if (type == byte.class) {
120 result = new Byte(in.readByte());
121 } else if (type == char.class) {
122 result = new Character(in.readChar());
123 } else if (type == short.class) {
124 result = new Short(in.readShort());
125 } else if (type == int.class) {
126 result = new Integer(in.readInt());
127 } else if (type == long.class) {
128 result = new Long(in.readLong());
129 } else if (type == float.class) {
130 result = new Float(in.readFloat());
131 } else if (type == double.class) {
132 result = new Double(in.readDouble());
133 } else {
134 throw new IOException("Unsupported primitive type: " + type);
135 }
136 } else {
137 result = in.readObject();
138 }
139 return result;
140 }
141
142 }