Pair.java

package org.holoeverywhere.util;

public class Pair<F, S> {
    public static <A, B> Pair<A, B> create(A a, B b) {
        return new Pair<A, B>(a, b);
    }

    public final F first;

    public final S second;

    public Pair(F first, S second) {
        this.first = first;
        this.second = second;
    }

    @Override
    @SuppressWarnings("unchecked")
    public boolean equals(Object o) {
        if (o == this) {
            return true;
        }
        if (!(o instanceof Pair)) {
            return false;
        }
        try {
            Pair<F, S> other = (Pair<F, S>) o;
            return first.equals(other.first) && second.equals(other.second);
        } catch (ClassCastException e) {
            return false;
        }
    }

    @Override
    public int hashCode() {
        int result = 17;
        result = 31 * result + first.hashCode();
        result = 31 * result + second.hashCode();
        return result;
    }
}