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/*
 * Copyright (C) 2013 Chris Leishman
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.parboiled.support;

import org.parboiled.matchers.Matcher;

public class MatcherPosition {
    private final Matcher matcher;
    private final Integer index;

    protected MatcherPosition(Matcher matcher, Integer index) {
        this.matcher = matcher;
        this.index = index;
    }

    public static MatcherPosition at(Matcher matcher, Integer index) {
        return new MatcherPosition(matcher, index);
    }

    @Override
    public int hashCode() {
        return 31 * matcher.hashCode() * index;
    }

	@Override
    public boolean equals(Object obj) {
        if (!(obj instanceof MatcherPosition)) {
            return false;
        }
        if (this == obj) {
            return true;
        }
        MatcherPosition other = (MatcherPosition)obj;
        return matcher == other.matcher && index == other.index;
    }
}