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 /**
20 * Method reference constant pool entry.
21 */
22 public class CPMethodRef extends CPRef {
23
24 private boolean hashCodeComputed;
25
26 private int cachedHashCode;
27
28 public CPMethodRef(final CPClass className, final CPNameAndType descriptor, final int globalIndex) {
29 super(CP_Methodref, className, descriptor, globalIndex);
30 }
31
32 private void generateHashCode() {
33 hashCodeComputed = true;
34 final int PRIME = 31;
35 int result = 1;
36 result = PRIME * result + className.hashCode();
37 result = PRIME * result + nameAndType.hashCode();
38 cachedHashCode = result;
39 }
40
41 @Override
42 protected ClassFileEntry[] getNestedClassFileEntries() {
43 return new ClassFileEntry[] { className, nameAndType };
44 }
45
46 @Override
47 public int hashCode() {
48 if (!hashCodeComputed) {
49 generateHashCode();
50 }
51 return cachedHashCode;
52 }
53
54 }