001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.commons.compress.harmony.unpack200.bytecode; 018 019/** 020 * Method reference constant pool entry. 021 */ 022public class CPMethodRef extends CPRef { 023 024 private boolean hashCodeComputed; 025 026 private int cachedHashCode; 027 028 public CPMethodRef(final CPClass className, final CPNameAndType descriptor, final int globalIndex) { 029 super(ConstantPoolEntry.CP_Methodref, className, descriptor, globalIndex); 030 } 031 private void generateHashCode() { 032 hashCodeComputed = true; 033 final int PRIME = 31; 034 int result = 1; 035 result = PRIME * result + className.hashCode(); 036 result = PRIME * result + nameAndType.hashCode(); 037 cachedHashCode = result; 038 } 039 040 @Override 041 protected ClassFileEntry[] getNestedClassFileEntries() { 042 return new ClassFileEntry[] {className, nameAndType}; 043 } 044 045 @Override 046 public int hashCode() { 047 if (!hashCodeComputed) { 048 generateHashCode(); 049 } 050 return cachedHashCode; 051 } 052 053}