    001/*
    002 * Licensed to the Apache Software Foundation (ASF) under one or more
    003 * contributor license agreements. See the NOTICE file distributed with this
    004 * work for additional information regarding copyright ownership. The ASF
    005 * licenses this file to You under the Apache License, Version 2.0 (the
    006 * "License"); you may not use this file except in compliance with the License.
    007 * You may obtain a copy of the License at
    008 * http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law
    009 * or agreed to in writing, software distributed under the License is
    010 * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    011 * KIND, either express or implied. See the License for the specific language
    012 * governing permissions and limitations under the License.
    013 */
    014package org.apache.commons.compress.harmony.unpack200.bytecode;
    015
    016/**
    017 * Interface method reference constant pool entry.
    018 */
    019public class CPInterfaceMethodRef extends CPRef {
    020
    021    public CPInterfaceMethodRef(final CPClass className, final CPNameAndType descriptor, final int globalIndex) {
    022        super(ConstantPoolEntry.CP_InterfaceMethodref, className, descriptor, globalIndex);
    023    }
    024
    025    /**
    026     * This method answers the value this method will use for an invokeinterface call. This is equal to 1 + the count of
    027     * all the args, where longs and doubles count for 2 and all others count for 1.
    028     *
    029     * @return integer count
    030     */
    031    public int invokeInterfaceCount() {
    032        return nameAndType.invokeInterfaceCount();
    033    }
    034
    035    private boolean hashcodeComputed;
    036    private int cachedHashCode;
    037
    038    private void generateHashCode() {
    039        hashcodeComputed = true;
    040        final int PRIME = 31;
    041        int result = 1;
    042        result = PRIME * result + className.hashCode();
    043        result = PRIME * result + nameAndType.hashCode();
    044        cachedHashCode = result;
    045    }
    046
    047    @Override
    048    public int hashCode() {
    049        if (!hashcodeComputed) {
    050            generateHashCode();
    051        }
    052        return cachedHashCode;
    053    }
    054
    055}