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Java > Open Source Codes > proguard > classfile > attribute > annotation > Annotation


1 /*
2  * ProGuard -- shrinking, optimization, obfuscation, and preverification
3  * of Java bytecode.
4  *
5  * Copyright (c) 2002-2007 Eric Lafortune (eric@graphics.cornell.edu)
6  *
7  * This library is free software; you can redistribute it and/or modify it
8  * under the terms of the GNU General Public License as published by the Free
9  * Software Foundation; either version 2 of the License, or (at your option)
10  * any later version.
11  *
12  * This library is distributed in the hope that it will be useful, but WITHOUT
13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
15  * for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public License
18  * along with this library; if not, write to the Free Software Foundation,
19  * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20  */
21 package proguard.classfile.attribute.annotation;
22
23 import proguard.classfile.*;
24 import proguard.classfile.attribute.annotation.visitor.ElementValueVisitor;
25 import proguard.classfile.visitor.ClassVisitor;
26
27 /**
28  * Representation of an annotation.
29  *
30  * @author Eric Lafortune
31  */
32 public class Annotation implements VisitorAccepter
33 {
34     public int u2typeIndex;
35     public int u2elementValuesCount;
36     public ElementValue[] elementValues;
37
38     /**
39      * An extra field pointing to the Clazz objects referenced in the
40      * type string. This field is typically filled out by the <code>{@link
41      * proguard.classfile.util.ClassReferenceInitializer
42      * ClassReferenceInitializer}</code>.
43      * References to primitive types are ignored.
44      */
45     public Clazz[] referencedClasses;
46
47     /**
48      * An extra field in which visitors can store information.
49      */
50     public Object JavaDoc visitorInfo;
51
52
53     /**
54      * Returns the type.
55      */
56     public String JavaDoc getType(Clazz clazz)
57     {
58         return clazz.getString(u2typeIndex);
59     }
60
61
62
63     /**
64      * Applies the given visitor to the first referenced class. This is the
65      * main annotation class.
66      */
67     public void referencedClassAccept(ClassVisitor classVisitor)
68     {
69         if (referencedClasses != null)
70         {
71             Clazz referencedClass = referencedClasses[0];
72             if (referencedClass != null)
73             {
74                 referencedClass.accept(classVisitor);
75             }
76         }
77     }
78
79
80     /**
81      * Applies the given visitor to all referenced classes.
82      */
83     public void referencedClassesAccept(ClassVisitor classVisitor)
84     {
85         if (referencedClasses != null)
86         {
87             for (int index = 0; index < referencedClasses.length; index++)
88             {
89                 Clazz referencedClass = referencedClasses[index];
90                 if (referencedClass != null)
91                 {
92                     referencedClass.accept(classVisitor);
93                 }
94             }
95         }
96     }
97
98
99     /**
100      * Applies the given visitor to all element value pairs.
101      */
102     public void elementValuesAccept(Clazz clazz, ElementValueVisitor elementValueVisitor)
103     {
104         for (int index = 0; index < u2elementValuesCount; index++)
105         {
106             elementValues[index].accept(clazz, this, elementValueVisitor);
107         }
108     }
109
110
111     // Implementations for VisitorAccepter.
112
113     public Object JavaDoc getVisitorInfo()
114     {
115         return visitorInfo;
116     }
117
118     public void setVisitorInfo(Object JavaDoc visitorInfo)
119     {
120         this.visitorInfo = visitorInfo;
121     }
122 }
123
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