01: /***
02: * ASM Guide
03: * Copyright (c) 2007 Eric Bruneton
04: * All rights reserved.
05: *
06: * Redistribution and use in source and binary forms, with or without
07: * modification, are permitted provided that the following conditions
08: * are met:
09: * 1. Redistributions of source code must retain the above copyright
10: * notice, this list of conditions and the following disclaimer.
11: * 2. Redistributions in binary form must reproduce the above copyright
12: * notice, this list of conditions and the following disclaimer in the
13: * documentation and/or other materials provided with the distribution.
14: * 3. Neither the name of the copyright holders nor the names of its
15: * contributors may be used to endorse or promote products derived from
16: * this software without specific prior written permission.
17: *
18: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19: * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21: * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
22: * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
28: * THE POSSIBILITY OF SUCH DAMAGE.
29: */package ch3.sec2;
30:
31: import static org.objectweb.asm.Opcodes.NOP;
32:
33: import org.objectweb.asm.ClassAdapter;
34: import org.objectweb.asm.ClassVisitor;
35: import org.objectweb.asm.MethodAdapter;
36: import org.objectweb.asm.MethodVisitor;
37:
38: /**
39: * ASM Guide example class.
40: *
41: * @author Eric Bruneton
42: */
43: public class RemoveNopClassAdapter extends ClassAdapter {
44:
45: public RemoveNopClassAdapter(ClassVisitor cv) {
46: super (cv);
47: }
48:
49: @Override
50: public MethodVisitor visitMethod(int access, String name,
51: String desc, String signature, String[] exceptions) {
52: MethodVisitor mv;
53: mv = cv.visitMethod(access, name, desc, signature, exceptions);
54: if (mv != null) {
55: mv = new RemoveNopAdapter(mv);
56: }
57: return mv;
58: }
59:
60: public class RemoveNopAdapter extends MethodAdapter {
61:
62: public RemoveNopAdapter(MethodVisitor mv) {
63: super (mv);
64: }
65:
66: @Override
67: public void visitInsn(int opcode) {
68: if (opcode != NOP) {
69: mv.visitInsn(opcode);
70: }
71: }
72: }
73: }
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