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
20 package org.apache.commons.compress.harmony.unpack200.bytecode;
21
22 /**
23 * Interface method reference constant pool entry.
24 */
25 public class CPInterfaceMethodRef extends CPRef {
26
27 private boolean hashCodeComputed;
28
29 private int cachedHashCode;
30
31 public CPInterfaceMethodRef(final CPClass className, final CPNameAndType descriptor, final int globalIndex) {
32 super(CP_InterfaceMethodref, className, descriptor, globalIndex);
33 }
34
35 private void generateHashCode() {
36 hashCodeComputed = true;
37 final int PRIME = 31;
38 int result = 1;
39 result = PRIME * result + className.hashCode();
40 result = PRIME * result + nameAndType.hashCode();
41 cachedHashCode = result;
42 }
43
44 @Override
45 public int hashCode() {
46 if (!hashCodeComputed) {
47 generateHashCode();
48 }
49 return cachedHashCode;
50 }
51
52 /**
53 * This method answers the value this method will use for an invokeinterface call. This is equal to 1 + the count of all the args, where longs and doubles
54 * count for 2 and all others count for 1.
55 *
56 * @return integer count
57 */
58 public int invokeInterfaceCount() {
59 return nameAndType.invokeInterfaceCount();
60 }
61
62 }