package org.apidesign.apifest08.currency;

public final class Pair<A,B> {

    private final A first;

    private final B second;

    public Pair(A first, B second) {

	this.first = first;

	this.second = second;

    }

    public A getFirst() { return first; }

    public B getSecond() { return second; }

    @Override

    public String toString() {

        return "(" + first + ", " + second + ")";

    }

    private static boolean equals(Object x, Object y) {

	return (x == null && y == null) || (x != null && x.equals(y));

    }

    @Override

    public int hashCode() {

        int hash = 5;

        hash = 59 * hash + (this.first != null ? this.first.hashCode() : 0);

        hash = 59 * hash + (this.second != null ? this.second.hashCode() : 0);

        return hash;

    }

    @Override

    public boolean equals(Object obj) {

        if (obj == null) {

            return false;

        }

        if (getClass() != obj.getClass()) {

            return false;

        }

        final Pair<A, B> other = (Pair<A, B>) obj;

        if (this.first != other.first && (this.first == null || !this.first.equals(other.first))) {

            return false;

        }

        if (this.second != other.second && (this.second == null || !this.second.equals(other.second))) {

            return false;

        }

        return true;

    }

}