it.acubelab.batframework.utils.Pair.java Source code

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Here is the source code for it.acubelab.batframework.utils.Pair.java

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/**
 * (C) Copyright 2012-2013 A-cube lab - Universit di Pisa - Dipartimento di Informatica. 
 * BAT-Framework is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
 * BAT-Framework is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License along with BAT-Framework.  If not, see <http://www.gnu.org/licenses/>.
 */

package it.acubelab.batframework.utils;

import java.io.Serializable;

import org.apache.commons.lang.ObjectUtils;
import org.apache.commons.lang.builder.CompareToBuilder;

public class Pair<T1 extends Serializable, T2 extends Serializable> 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;
    }

    public int compareTo(Pair<T1, T2> other) {
        return new CompareToBuilder().append(first, other.first).append(second, other.second).toComparison();
    }

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

    @Override
    public int hashCode() {
        return (first == null ? 0 : first.hashCode()) ^ (second == null ? 0 : second.hashCode());
    }

    @Override
    public String toString() {
        return String.format("(%s, %s)", this.first.toString(), this.second.toString());
    }

}