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 package org.apache.commons.compress.harmony.unpack200.bytecode;
18
19 import java.io.DataOutputStream;
20 import java.io.IOException;
21
22 /**
23 * Enclosing method class file attribute.
24 */
25 public class EnclosingMethodAttribute extends Attribute {
26
27 private static CPUTF8 attributeName;
28
29 public static void setAttributeName(final CPUTF8 cpUTF8Value) {
30 attributeName = cpUTF8Value;
31 }
32
33 private int classIndex;
34 private int methodIndex;
35 private final CPClass cpClass;
36
37 private final CPNameAndType method;
38
39 public EnclosingMethodAttribute(final CPClass cpClass, final CPNameAndType method) {
40 super(attributeName);
41 this.cpClass = cpClass;
42 this.method = method;
43 }
44
45 /*
46 * (non-Javadoc)
47 *
48 * @see org.apache.commons.compress.harmony.unpack200.bytecode.Attribute#getLength()
49 */
50 @Override
51 protected int getLength() {
52 return 4;
53 }
54
55 @Override
56 protected ClassFileEntry[] getNestedClassFileEntries() {
57 if (method != null) {
58 return new ClassFileEntry[] { attributeName, cpClass, method };
59 }
60 return new ClassFileEntry[] { attributeName, cpClass };
61 }
62
63 @Override
64 protected void resolve(final ClassConstantPool pool) {
65 super.resolve(pool);
66 cpClass.resolve(pool);
67 classIndex = pool.indexOf(cpClass);
68 if (method != null) {
69 method.resolve(pool);
70 methodIndex = pool.indexOf(method);
71 } else {
72 methodIndex = 0;
73 }
74 }
75
76 /*
77 * (non-Javadoc)
78 *
79 * @see org.apache.commons.compress.harmony.unpack200.bytecode.ClassFileEntry#toString()
80 */
81 @Override
82 public String toString() {
83 return "EnclosingMethod";
84 }
85
86 /*
87 * (non-Javadoc)
88 *
89 * @see org.apache.commons.compress.harmony.unpack200.bytecode.Attribute#writeBody(java.io.DataOutputStream)
90 */
91 @Override
92 protected void writeBody(final DataOutputStream dos) throws IOException {
93 dos.writeShort(classIndex);
94 dos.writeShort(methodIndex);
95 }
96
97 }