org.osgi.service.indexer.impl.util.Pair Maven / Gradle / Ivy

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/**
 * ==========================================================================
 * Copyright © 2015-2018 OSGi Alliance, Cristiano Gavião.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 * Cristiano Gavião ([email protected])- initial API and implementation
 * ==========================================================================
 */
package org.osgi.service.indexer.impl.util;

public class Pair {

    private final A first;
    private final B second;

    public Pair(A first, B second) {
        this.first = first;
        this.second = second;
    }

    public static  Pair create(A first, B second) {
        return new Pair<>(first, second);
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj)
            return true;
        if (obj == null)
            return false;
        if (getClass() != obj.getClass())
            return false;
        Pair other = (Pair) obj;
        if (first == null) {
            if (other.first != null)
                return false;
        } else
            if (!first.equals(other.first))
                return false;
        if (second == null) {
            if (other.second != null)
                return false;
        } else
            if (!second.equals(other.second))
                return false;
        return true;
    }

    public A getFirst() {
        return first;
    }

    public B getSecond() {
        return second;
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((first == null) ? 0 : first.hashCode());
        result = prime * result + ((second == null) ? 0 : second.hashCode());
        return result;
    }

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

}