1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * https://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19
20 package org.apache.bcel.classfile;
21
22 import java.io.DataInput;
23 import java.io.DataOutputStream;
24 import java.io.IOException;
25
26 import org.apache.bcel.Const;
27
28 /**
29 * Represents the default value of a annotation for a method info.
30 *
31 * @since 6.0
32 */
33 public class AnnotationDefault extends Attribute {
34
35 private ElementValue defaultValue;
36
37 /**
38 * @param nameIndex Index pointing to the name <em>Code</em>
39 * @param length Content length in bytes
40 * @param input Input stream
41 * @param constantPool Array of constants
42 */
43 AnnotationDefault(final int nameIndex, final int length, final DataInput input, final ConstantPool constantPool) throws IOException {
44 this(nameIndex, length, (ElementValue) null, constantPool);
45 defaultValue = ElementValue.readElementValue(input, constantPool);
46 }
47
48 /**
49 * @param nameIndex Index pointing to the name <em>Code</em>
50 * @param length Content length in bytes
51 * @param defaultValue the annotation's default value
52 * @param constantPool Array of constants
53 */
54 public AnnotationDefault(final int nameIndex, final int length, final ElementValue defaultValue, final ConstantPool constantPool) {
55 super(Const.ATTR_ANNOTATION_DEFAULT, nameIndex, length, constantPool);
56 this.defaultValue = defaultValue;
57 }
58
59 /**
60 * Called by objects that are traversing the nodes of the tree implicitly defined by the contents of a Java class.
61 * I.e., the hierarchy of methods, fields, attributes, etc. spawns a tree of objects.
62 *
63 * @param v Visitor object
64 */
65 @Override
66 public void accept(final Visitor v) {
67 v.visitAnnotationDefault(this);
68 }
69
70 @Override
71 public Attribute copy(final ConstantPool constantPool) {
72 return (Attribute) clone();
73 }
74
75 @Override
76 public final void dump(final DataOutputStream dos) throws IOException {
77 super.dump(dos);
78 defaultValue.dump(dos);
79 }
80
81 /**
82 * @return the default value
83 */
84 public final ElementValue getDefaultValue() {
85 return defaultValue;
86 }
87
88 /**
89 * @param defaultValue the default value of this methodinfo's annotation
90 */
91 public final void setDefaultValue(final ElementValue defaultValue) {
92 this.defaultValue = defaultValue;
93 }
94 }