1/*
2 * ProGuard -- shrinking, optimization, obfuscation, and preverification
3 *             of Java bytecode.
4 *
5 * Copyright (c) 2002-2014 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.target;
22
23import proguard.classfile.*;
24import proguard.classfile.attribute.CodeAttribute;
25import proguard.classfile.attribute.annotation.TypeAnnotation;
26import proguard.classfile.attribute.annotation.target.visitor.TargetInfoVisitor;
27
28/**
29 * Representation of an annotation target.
30 *
31 * @author Eric Lafortune
32 */
33public abstract class TargetInfo
34{
35    public byte u1targetType;
36
37
38    /**
39     * Creates an uninitialized TargetInfo.
40     */
41    protected TargetInfo()
42    {
43    }
44
45
46    /**
47     * Creates an initialized TargetInfo.
48     */
49    protected TargetInfo(byte u1targetType)
50    {
51        this.u1targetType = u1targetType;
52    }
53
54
55    /**
56     * Returns the type of the target.
57     */
58    public byte getTargetType()
59    {
60        return u1targetType;
61    }
62
63
64    // Methods to be implemented by extensions.
65
66    /**
67     * Accepts the given visitor, in the context of a type annotation on a class.
68     */
69    public void accept(Clazz clazz,                                             TypeAnnotation typeAnnotation, TargetInfoVisitor targetInfoVisitor)
70    {
71        throw new UnsupportedOperationException("Unsupported type annotation [0x"+Integer.toHexString(u1targetType)+"] on a class");
72    }
73
74    /**
75     * Accepts the given visitor, in the context of a type annotation on a field.
76     */
77    public void accept(Clazz clazz, Field field,                                TypeAnnotation typeAnnotation, TargetInfoVisitor targetInfoVisitor)
78    {
79        throw new UnsupportedOperationException("Unsupported type annotation [0x"+Integer.toHexString(u1targetType)+"] on a field");
80    }
81
82    /**
83     * Accepts the given visitor, in the context of a type annotation on a method.
84     */
85    public void accept(Clazz clazz, Method method,                              TypeAnnotation typeAnnotation, TargetInfoVisitor targetInfoVisitor)
86    {
87        throw new UnsupportedOperationException("Unsupported type annotation [0x"+Integer.toHexString(u1targetType)+"] on a method");
88    }
89
90    /**
91     * Accepts the given visitor, in the context of a type annotation code.
92     */
93    public void accept(Clazz clazz, Method method, CodeAttribute codeAttribute, TypeAnnotation typeAnnotation, TargetInfoVisitor targetInfoVisitor)
94    {
95        throw new UnsupportedOperationException("Unsupported type annotation [0x"+Integer.toHexString(u1targetType)+"] on code");
96    }
97}
98