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


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.Attribute;
34 import org.objectweb.asm.FieldVisitor;
35
36 /**
37  * A {@link FieldVisitor} that collects the {@link Constant}s of the fields it
38  * visits.
39  *
40  * @author Eric Bruneton
41  */
42 public class FieldConstantsCollector implements FieldVisitor {
43
44     private FieldVisitor fv;
45
46     private ConstantPool cp;
47
48     public FieldConstantsCollector(final FieldVisitor fv, final ConstantPool cp)
49     {
50         this.fv = fv;
51         this.cp = cp;
52     }
53
54     public AnnotationVisitor visitAnnotation(
55         final String JavaDoc desc,
56         final boolean visible)
57     {
58         cp.newUTF8(desc);
59         if (visible) {
60             cp.newUTF8("RuntimeVisibleAnnotations");
61         } else {
62             cp.newUTF8("RuntimeInvisibleAnnotations");
63         }
64         return new AnnotationConstantsCollector(fv.visitAnnotation(desc,
65                 visible), cp);
66     }
67
68     public void visitAttribute(final Attribute attr) {
69         // can do nothing
70 fv.visitAttribute(attr);
71     }
72
73     public void visitEnd() {
74         fv.visitEnd();
75     }
76 }
77
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