1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with this
4 * work for additional information regarding copyright ownership. The ASF
5 * licenses this file to You under the Apache License, Version 2.0 (the
6 * "License"); you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law
9 * or agreed to in writing, software distributed under the License is
10 * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
11 * KIND, either express or implied. See the License for the specific language
12 * governing permissions and limitations under the License.
13 */
14 package org.apache.commons.compress.harmony.unpack200.bytecode;
15
16 /**
17 * Interface method reference constant pool entry.
18 */
19 public class CPInterfaceMethodRef extends CPRef {
20
21 private boolean hashCodeComputed;
22
23 private int cachedHashCode;
24
25 public CPInterfaceMethodRef(final CPClass className, final CPNameAndType descriptor, final int globalIndex) {
26 super(CP_InterfaceMethodref, className, descriptor, globalIndex);
27 }
28
29 private void generateHashCode() {
30 hashCodeComputed = true;
31 final int PRIME = 31;
32 int result = 1;
33 result = PRIME * result + className.hashCode();
34 result = PRIME * result + nameAndType.hashCode();
35 cachedHashCode = result;
36 }
37
38 @Override
39 public int hashCode() {
40 if (!hashCodeComputed) {
41 generateHashCode();
42 }
43 return cachedHashCode;
44 }
45
46 /**
47 * 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
48 * count for 2 and all others count for 1.
49 *
50 * @return integer count
51 */
52 public int invokeInterfaceCount() {
53 return nameAndType.invokeInterfaceCount();
54 }
55
56 }