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