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 ch8.sec2;
30:
31: import static org.objectweb.asm.Opcodes.V1_5;
32:
33: import java.util.ArrayList;
34: import java.util.Iterator;
35:
36: import org.objectweb.asm.tree.AnnotationNode;
37: import org.objectweb.asm.tree.ClassNode;
38:
39: import ch5.sec1.ClassTransformer;
40:
41: /**
42: * ASM Guide example class.
43: *
44: * @author Eric Bruneton
45: */
46: public class AddAnnotationTransformer extends ClassTransformer {
47:
48: private String annotationDesc;
49:
50: public AddAnnotationTransformer(ClassTransformer ct,
51: String annotationDesc) {
52: super (ct);
53: this .annotationDesc = annotationDesc;
54: }
55:
56: public void transform(ClassNode cn) {
57: cn.version = (cn.version & 0xFF) < V1_5 ? V1_5 : cn.version;
58: boolean isPresent = false;
59: if (cn.visibleAnnotations != null) {
60: Iterator i = cn.visibleAnnotations.iterator();
61: while (i.hasNext()) {
62: AnnotationNode an = (AnnotationNode) i.next();
63: if (annotationDesc.equals(an.desc)) {
64: isPresent = true;
65: break;
66: }
67: }
68: }
69: if (!isPresent) {
70: if (cn.visibleAnnotations == null) {
71: cn.visibleAnnotations = new ArrayList(5);
72: }
73: cn.visibleAnnotations
74: .add(new AnnotationNode(annotationDesc));
75: }
76: super.transform(cn);
77: }
78: }
|