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Java > Open Source Codes > org > objectweb > asm > optimizer > MethodOptimizer


1 /***
2  * ASM: a very small and fast Java bytecode manipulation framework
3  * Copyright (c) 2000-2005 INRIA, France Telecom
4  * All rights reserved.
5  *
6  * Redistribution and use in source and binary forms, with or without
7  * modification, are permitted provided that the following conditions
8  * are met:
9  * 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  */
30 package org.objectweb.asm.optimizer;
31
32 import org.objectweb.asm.AnnotationVisitor;
33 import org.objectweb.asm.Label;
34 import org.objectweb.asm.MethodAdapter;
35 import org.objectweb.asm.MethodVisitor;
36
37 /**
38  * A {@link MethodAdapter} that renames fields and methods, and removes debug
39  * info.
40  *
41  * @author Eric Bruneton
42  */
43 public class MethodOptimizer extends MethodAdapter {
44
45     private NameMapping mapping;
46
47     public MethodOptimizer(final MethodVisitor mv, final NameMapping mapping) {
48         super(mv);
49         this.mapping = mapping;
50     }
51
52     // ------------------------------------------------------------------------
53 // Overriden methods
54 // ------------------------------------------------------------------------
55
56     public AnnotationVisitor visitAnnotationDefault() {
57         throw new UnsupportedOperationException JavaDoc();
58     }
59
60     public AnnotationVisitor visitParameterAnnotation(
61         final int parameter,
62         final String JavaDoc desc,
63         final boolean visible)
64     {
65         throw new UnsupportedOperationException JavaDoc();
66     }
67
68     public void visitTypeInsn(final int opcode, final String JavaDoc desc) {
69         mv.visitTypeInsn(opcode, desc.startsWith("[")
70                 ? mapping.fix(desc)
71                 : mapping.map(desc));
72     }
73
74     public void visitFieldInsn(
75         final int opcode,
76         final String JavaDoc owner,
77         final String JavaDoc name,
78         final String JavaDoc desc)
79     {
80         mv.visitFieldInsn(opcode, mapping.map(owner), mapping.map(owner + "."
81                 + name), mapping.fix(desc));
82     }
83
84     public void visitMethodInsn(
85         final int opcode,
86         final String JavaDoc owner,
87         final String JavaDoc name,
88         final String JavaDoc desc)
89     {
90         mv.visitMethodInsn(opcode, mapping.map(owner), mapping.map(owner + "."
91                 + name + desc), mapping.fix(desc));
92     }
93
94     public void visitLocalVariable(
95         final String JavaDoc name,
96         final String JavaDoc desc,
97         final String JavaDoc signature,
98         final Label start,
99         final Label end,
100         final int index)
101     {
102         // remove debug info
103 }
104
105     public void visitLineNumber(final int line, final Label start) {
106         // remove debug info
107 }
108 }
109
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