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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   * @version $Id: AnnotationDefault.html 1018313 2017-09-18 09:03:04Z britter $
30   * @since 6.0
31   */
32  public class AnnotationDefault extends Attribute {
33  
34      private ElementValue default_value;
35  
36      /**
37       * @param name_index    Index pointing to the name <em>Code</em>
38       * @param length        Content length in bytes
39       * @param input         Input stream
40       * @param constant_pool Array of constants
41       */
42      AnnotationDefault(final int name_index, final int length, final DataInput input, final ConstantPool constant_pool) throws IOException {
43          this(name_index, length, (ElementValue) null, constant_pool);
44          default_value = ElementValue.readElementValue(input, constant_pool);
45      }
46  
47      /**
48       * @param name_index    Index pointing to the name <em>Code</em>
49       * @param length        Content length in bytes
50       * @param defaultValue  the annotation's default value
51       * @param constant_pool Array of constants
52       */
53      public AnnotationDefault(final int name_index, final int length, final ElementValue defaultValue, final ConstantPool constant_pool) {
54          super(Const.ATTR_ANNOTATION_DEFAULT, name_index, length, constant_pool);
55          this.default_value = defaultValue;
56      }
57  
58      /**
59       * Called by objects that are traversing the nodes of the tree implicitely
60       * defined by the contents of a Java class. I.e., the hierarchy of methods,
61       * 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      /**
71       * @param defaultValue the default value of this methodinfo's annotation
72       */
73      public final void setDefaultValue(final ElementValue defaultValue) {
74          default_value = defaultValue;
75      }
76  
77      /**
78       * @return the default value
79       */
80      public final ElementValue getDefaultValue() {
81          return default_value;
82      }
83  
84      @Override
85      public Attribute copy(final ConstantPool _constant_pool) {
86          return (Attribute) clone();
87      }
88  
89      @Override
90      public final void dump(final DataOutputStream dos) throws IOException {
91          super.dump(dos);
92          default_value.dump(dos);
93      }
94  }