1/*
2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
3 *
4 * This code is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License version 2 only, as
6 * published by the Free Software Foundation.  Oracle designates this
7 * particular file as subject to the "Classpath" exception as provided
8 * by Oracle in the LICENSE file that accompanied this code.
9 *
10 * This code is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
13 * version 2 for more details (a copy is included in the LICENSE file that
14 * accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License version
17 * 2 along with this work; if not, write to the Free Software Foundation,
18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
19 *
20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
21 * or visit www.oracle.com if you need additional information or have any
22 * questions.
23 */
24
25/*
26 * This file is available under and governed by the GNU General Public
27 * License version 2 only, as published by the Free Software Foundation.
28 * However, the following notice accompanied the original version of this
29 * file:
30 *
31 * ASM: a very small and fast Java bytecode manipulation framework
32 * Copyright (c) 2000-2011 INRIA, France Telecom
33 * All rights reserved.
34 *
35 * Redistribution and use in source and binary forms, with or without
36 * modification, are permitted provided that the following conditions
37 * are met:
38 * 1. Redistributions of source code must retain the above copyright
39 *    notice, this list of conditions and the following disclaimer.
40 * 2. Redistributions in binary form must reproduce the above copyright
41 *    notice, this list of conditions and the following disclaimer in the
42 *    documentation and/or other materials provided with the distribution.
43 * 3. Neither the name of the copyright holders nor the names of its
44 *    contributors may be used to endorse or promote products derived from
45 *    this software without specific prior written permission.
46 *
47 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
48 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
49 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
50 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
51 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
52 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
53 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
54 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
55 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
56 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
57 * THE POSSIBILITY OF SUCH DAMAGE.
58 */
59package jdk.internal.org.objectweb.asm.util;
60
61import jdk.internal.org.objectweb.asm.AnnotationVisitor;
62import jdk.internal.org.objectweb.asm.Opcodes;
63import jdk.internal.org.objectweb.asm.Type;
64
65/**
66 * An {@link AnnotationVisitor} that checks that its methods are properly used.
67 *
68 * @author Eric Bruneton
69 */
70public class CheckAnnotationAdapter extends AnnotationVisitor {
71
72    private final boolean named;
73
74    private boolean end;
75
76    public CheckAnnotationAdapter(final AnnotationVisitor av) {
77        this(av, true);
78    }
79
80    CheckAnnotationAdapter(final AnnotationVisitor av, final boolean named) {
81        super(Opcodes.ASM5, av);
82        this.named = named;
83    }
84
85    @Override
86    public void visit(final String name, final Object value) {
87        checkEnd();
88        checkName(name);
89        if (!(value instanceof Byte || value instanceof Boolean
90                || value instanceof Character || value instanceof Short
91                || value instanceof Integer || value instanceof Long
92                || value instanceof Float || value instanceof Double
93                || value instanceof String || value instanceof Type
94                || value instanceof byte[] || value instanceof boolean[]
95                || value instanceof char[] || value instanceof short[]
96                || value instanceof int[] || value instanceof long[]
97                || value instanceof float[] || value instanceof double[])) {
98            throw new IllegalArgumentException("Invalid annotation value");
99        }
100        if (value instanceof Type) {
101            int sort = ((Type) value).getSort();
102            if (sort == Type.METHOD) {
103                throw new IllegalArgumentException("Invalid annotation value");
104            }
105        }
106        if (av != null) {
107            av.visit(name, value);
108        }
109    }
110
111    @Override
112    public void visitEnum(final String name, final String desc,
113            final String value) {
114        checkEnd();
115        checkName(name);
116        CheckMethodAdapter.checkDesc(desc, false);
117        if (value == null) {
118            throw new IllegalArgumentException("Invalid enum value");
119        }
120        if (av != null) {
121            av.visitEnum(name, desc, value);
122        }
123    }
124
125    @Override
126    public AnnotationVisitor visitAnnotation(final String name,
127            final String desc) {
128        checkEnd();
129        checkName(name);
130        CheckMethodAdapter.checkDesc(desc, false);
131        return new CheckAnnotationAdapter(av == null ? null
132                : av.visitAnnotation(name, desc));
133    }
134
135    @Override
136    public AnnotationVisitor visitArray(final String name) {
137        checkEnd();
138        checkName(name);
139        return new CheckAnnotationAdapter(av == null ? null
140                : av.visitArray(name), false);
141    }
142
143    @Override
144    public void visitEnd() {
145        checkEnd();
146        end = true;
147        if (av != null) {
148            av.visitEnd();
149        }
150    }
151
152    private void checkEnd() {
153        if (end) {
154            throw new IllegalStateException(
155                    "Cannot call a visit method after visitEnd has been called");
156        }
157    }
158
159    private void checkName(final String name) {
160        if (named && name == null) {
161            throw new IllegalArgumentException(
162                    "Annotation value name must not be null");
163        }
164    }
165}
166