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 /**
22 * Method reference constant pool entry.
23 */
24 public class CPMethodRef extends CPRef {
25
26 private boolean hashCodeComputed;
27
28 private int cachedHashCode;
29
30 public CPMethodRef(final CPClass className, final CPNameAndType descriptor, final int globalIndex) {
31 super(CP_Methodref, className, descriptor, globalIndex);
32 }
33
34 private void generateHashCode() {
35 hashCodeComputed = true;
36 final int PRIME = 31;
37 int result = 1;
38 result = PRIME * result + className.hashCode();
39 result = PRIME * result + nameAndType.hashCode();
40 cachedHashCode = result;
41 }
42
43 @Override
44 protected ClassFileEntry[] getNestedClassFileEntries() {
45 return new ClassFileEntry[] { className, nameAndType };
46 }
47
48 @Override
49 public int hashCode() {
50 if (!hashCodeComputed) {
51 generateHashCode();
52 }
53 return cachedHashCode;
54 }
55
56 }