Tuple.java

package com.kartoflane.superluminal2.components;

public class Tuple<K, V> {
	private K k = null;
	private V v = null;

	public Tuple() {
	}

	public Tuple(K key, V value) {
		k = key;
		v = value;
	}

	public void setKey(K key) {
		k = key;
	}

	public K getKey() {
		return k;
	}

	public void setValue(V value) {
		v = value;
	}

	public V getValue() {
		return v;
	}

	public int hashCode() {
		int hashK = k != null ? k.hashCode() : 0;
		int hashV = v != null ? v.hashCode() : 0;

		return (hashK + hashV) * hashV + hashK;
	}

	public boolean equals(Object o) {
		if (o instanceof Tuple) {
			Tuple<?, ?> ot = (Tuple<?, ?>) o;
			return ((this.k == ot.k || (this.k != null && ot.k != null && this.k.equals(ot.k))) &&
					(this.v == ot.v || (this.v != null && ot.v != null && this.v.equals(ot.v))));
		}

		return false;
	}

	public String toString() {
		return "(" + k + ", " + v + ")";
	}
}