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


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 import net.sf.retrotranslator.runtime.asm.*;
35
36 /**
37  * @author Taras Puchko
38  */

39 class ArrayCloningVisitor extends ClassAdapter {
40
41     public ArrayCloningVisitor(ClassVisitor visitor) {
42         super(visitor);
43     }
44
45     public MethodVisitor visitMethod(int access, String JavaDoc name, String JavaDoc desc, String JavaDoc signature, String JavaDoc[] exceptions) {
46         MethodVisitor visitor = super.visitMethod(access, name, desc, signature, exceptions);
47         return visitor == null ? null : new MethodAdapter(visitor) {
48
49             public void visitMethodInsn(int opcode, String JavaDoc owner, String JavaDoc name, String JavaDoc desc) {
50                 if (opcode == Opcodes.INVOKEVIRTUAL && owner.charAt(0) == '[' &&
51                         name.equals("clone") && desc.equals(TransformerTools.descriptor(Object JavaDoc.class))) {
52                     owner = Type.getInternalName(Object JavaDoc.class);
53                 }
54                 super.visitMethodInsn(opcode, owner, name, desc);
55             }
56
57         };
58     }
59 }
60
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