KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > net > sf > retrotranslator > transformer > SunJITRetrotranslator


1 /***
2  * Retrotranslator: a Java bytecode transformer that translates Java classes
3  * compiled with JDK 5.0 into classes that can be run on JVM 1.4.
4  *
5  * Copyright (c) 2005 - 2007 Taras Puchko
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  * notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  * notice, this list of conditions and the following disclaimer in the
15  * documentation and/or other materials provided with the distribution.
16  * 3. Neither the name of the copyright holders nor the names of its
17  * contributors may be used to endorse or promote products derived from
18  * this software without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30  * THE POSSIBILITY OF SUCH DAMAGE.
31  */
32 package net.sf.retrotranslator.transformer;
33
34 /**
35  * @author Taras Puchko
36  */
37 class SunJITRetrotranslator {
38
39     private static class ClassFileTransformerImpl extends ClassFileTransformer {
40
41         private final ClassTransformer transformer;
42
43         public ClassFileTransformerImpl(ClassTransformer transformer) {
44             this.transformer = transformer;
45         }
46
47         public byte[] transform(byte[] bytes, int offset, int length) {
48             return transformer.transform(bytes, offset, length);
49         }
50     }
51
52     public static void install(ClassTransformer classTransformer) {
53         try {
54             for (Object JavaDoc transformer : ClassFileTransformer.getTransformers()) {
55                 if (transformer instanceof ClassFileTransformerImpl) return;
56             }
57             ClassFileTransformer.add(new ClassFileTransformerImpl(classTransformer));
58         } catch (Throwable JavaDoc e) {
59             // ignore
60 }
61     }
62 }
63
64
Popular Tags