/*
 * Copyright 2009-2010 by The Regents of the University of California
 * 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 from
 * 
 *     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 edu.uci.ics.hyracks.algebricks.common.utils;

import java.io.Serializable;

public class Pair<T1, T2> implements Serializable {

    private static final long serialVersionUID = 1L;
    public T1 first;
    public T2 second;

    public Pair(T1 first, T2 second) {
        this.first = first;
        this.second = second;
    }

    @Override
    public String toString() {
        return first + "," + second;
    }

    @Override
    public boolean equals(Object obj) {
        if (!(obj instanceof Pair<?, ?>)) {
            return false;
        } else {
            Pair<?, ?> p = (Pair<?, ?>) obj;
            return this.first.equals(p.first) && this.second.equals(p.second);
        }
    }

    @Override
    public int hashCode() {
        return first.hashCode() * 31 + second.hashCode();
    }

}