Pair.java

/*******************************************************************************
 * Copyright (c) 2009 Neil Bartlett.
 * 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:
 *     Neil Bartlett - initial API and implementation
 ******************************************************************************/
package com.rabbitmq.client.osgi.common;

public class Pair<A, B> {
	private final A fst;
	private final B snd;

	public Pair(A fst, B snd) {
		this.fst = fst;
		this.snd = snd;
	}

	public A getFst() {
		return fst;
	}

	public B getSnd() {
		return snd;
	}
	
	// hashCode and equals generated by Eclipse

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

	@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 (fst == null) {
			if (other.fst != null)
				return false;
		} else if (!fst.equals(other.fst))
			return false;
		if (snd == null) {
			if (other.snd != null)
				return false;
		} else if (!snd.equals(other.snd))
			return false;
		return true;
	}

	@Override
	public String toString() {
		StringBuilder buf = new StringBuilder();
		buf.append('(').append(fst).append(',').append(snd).append(')');
		return buf.toString();
	}
	
}