EnumConstantElementValue.java revision b72c5c2e5482cf10117b2b25f642f7616b2326c3 
1/*
2 * ProGuard -- shrinking, optimization, obfuscation, and preverification
3 *             of Java bytecode.
4 *
5 * Copyright (c) 2002-2009 Eric Lafortune (eric@graphics.cornell.edu)
6 *
7 * This program 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 program 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 General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, write to the Free Software Foundation, Inc.,
19 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21package proguard.classfile.attribute.annotation;
22
23import proguard.classfile.*;
24import proguard.classfile.attribute.annotation.visitor.ElementValueVisitor;
25import proguard.classfile.visitor.ClassVisitor;
26
27/**
28 * This ElementValue represents an enumeration constant element value.
29 *
30 * @author Eric Lafortune
31 */
32public class EnumConstantElementValue extends ElementValue
33{
34    public int u2typeNameIndex;
35    public int u2constantNameIndex;
36
37    /**
38     * An extra field pointing to the Clazz objects referenced in the
39     * type name string. This field is typically filled out by the <code>{@link
40     * proguard.classfile.util.ClassReferenceInitializer
41     * ClassReferenceInitializer}</code>.
42     * References to primitive types are ignored.
43     */
44    public Clazz[] referencedClasses;
45
46
47    /**
48     * Creates an uninitialized EnumConstantElementValue.
49     */
50    public EnumConstantElementValue()
51    {
52    }
53
54
55    /**
56     * Creates an initialized EnumConstantElementValue.
57     */
58    public EnumConstantElementValue(int u2elementNameIndex,
59                                    int u2typeNameIndex,
60                                    int u2constantNameIndex)
61    {
62        super(u2elementNameIndex);
63
64        this.u2typeNameIndex     = u2typeNameIndex;
65        this.u2constantNameIndex = u2constantNameIndex;
66    }
67
68
69    /**
70     * Applies the given visitor to all referenced classes.
71     */
72    public void referencedClassesAccept(ClassVisitor classVisitor)
73    {
74        if (referencedClasses != null)
75        {
76            for (int index = 0; index < referencedClasses.length; index++)
77            {
78                Clazz referencedClass = referencedClasses[index];
79                if (referencedClass != null)
80                {
81                    referencedClass.accept(classVisitor);
82                }
83            }
84        }
85    }
86
87
88    // Implementations for ElementValue.
89
90    public int getTag()
91    {
92        return ClassConstants.ELEMENT_VALUE_ENUM_CONSTANT;
93    }
94
95    public void accept(Clazz clazz, Annotation annotation, ElementValueVisitor elementValueVisitor)
96    {
97        elementValueVisitor.visitEnumConstantElementValue(clazz, annotation, this);
98    }
99}
100