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 package org.apache.commons.compress.harmony.unpack200.bytecode;
20
21 import java.io.DataOutputStream;
22 import java.io.IOException;
23
24 /**
25 * Enclosing method class file attribute.
26 */
27 public class EnclosingMethodAttribute extends Attribute {
28
29 private static CPUTF8 attributeName;
30
31 public static void setAttributeName(final CPUTF8 cpUTF8Value) {
32 attributeName = cpUTF8Value;
33 }
34
35 private int classIndex;
36 private int methodIndex;
37 private final CPClass cpClass;
38
39 private final CPNameAndType method;
40
41 /**
42 * Constructs a new instance.
43 *
44 * @param cpClass a constant pool class.
45 * @param method a constant pool name and type.
46 */
47 public EnclosingMethodAttribute(final CPClass cpClass, final CPNameAndType method) {
48 super(attributeName);
49 this.cpClass = cpClass;
50 this.method = method;
51 }
52
53 /*
54 * (non-Javadoc)
55 *
56 * @see org.apache.commons.compress.harmony.unpack200.bytecode.Attribute#getLength()
57 */
58 @Override
59 protected int getLength() {
60 return 4;
61 }
62
63 @Override
64 protected ClassFileEntry[] getNestedClassFileEntries() {
65 if (method != null) {
66 return new ClassFileEntry[] { attributeName, cpClass, method };
67 }
68 return new ClassFileEntry[] { attributeName, cpClass };
69 }
70
71 @Override
72 protected void resolve(final ClassConstantPool pool) {
73 super.resolve(pool);
74 cpClass.resolve(pool);
75 classIndex = pool.indexOf(cpClass);
76 if (method != null) {
77 method.resolve(pool);
78 methodIndex = pool.indexOf(method);
79 } else {
80 methodIndex = 0;
81 }
82 }
83
84 /*
85 * (non-Javadoc)
86 *
87 * @see org.apache.commons.compress.harmony.unpack200.bytecode.ClassFileEntry#toString()
88 */
89 @Override
90 public String toString() {
91 return "EnclosingMethod";
92 }
93
94 /*
95 * (non-Javadoc)
96 *
97 * @see org.apache.commons.compress.harmony.unpack200.bytecode.Attribute#writeBody(java.io.DataOutputStream)
98 */
99 @Override
100 protected void writeBody(final DataOutputStream dos) throws IOException {
101 dos.writeShort(classIndex);
102 dos.writeShort(methodIndex);
103 }
104
105 }