001/*
002 * Copyright (C) 2013 Chris Leishman
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016package org.parboiled.support;
017
018import org.parboiled.matchers.Matcher;
019
020public class MatcherPosition {
021    private final Matcher matcher;
022    private final Integer index;
023
024    protected MatcherPosition(Matcher matcher, Integer index) {
025        this.matcher = matcher;
026        this.index = index;
027    }
028
029    public static MatcherPosition at(Matcher matcher, Integer index) {
030        return new MatcherPosition(matcher, index);
031    }
032
033    @Override
034    public int hashCode() {
035        return 31 * matcher.hashCode() * index;
036    }
037
038        @Override
039    public boolean equals(Object obj) {
040        if (!(obj instanceof MatcherPosition)) {
041            return false;
042        }
043        if (this == obj) {
044            return true;
045        }
046        MatcherPosition other = (MatcherPosition)obj;
047        return matcher == other.matcher && index == other.index;
048    }
049}