001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *   https://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing,
013 * software distributed under the License is distributed on an
014 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
015 * KIND, either express or implied.  See the License for the
016 * specific language governing permissions and limitations
017 * under the License.
018 */
019package org.apache.commons.compress.harmony.unpack200.bytecode;
020
021import java.util.List;
022
023/**
024 * Method constant pool entry.
025 */
026public class CPMethod extends CPMember {
027
028    private boolean hashCodeComputed;
029
030    private int cachedHashCode;
031
032    public CPMethod(final CPUTF8 name, final CPUTF8 descriptor, final long flags, final List<Attribute> attributes) {
033        super(name, descriptor, flags, attributes);
034    }
035
036    private void generateHashCode() {
037        hashCodeComputed = true;
038        final int PRIME = 31;
039        int result = 1;
040        result = PRIME * result + name.hashCode();
041        result = PRIME * result + descriptor.hashCode();
042        cachedHashCode = result;
043    }
044
045    @Override
046    public int hashCode() {
047        if (!hashCodeComputed) {
048            generateHashCode();
049        }
050        return cachedHashCode;
051    }
052
053    @Override
054    public String toString() {
055        return "Method: " + name + "(" + descriptor + ")";
056    }
057
058}