CaseId.java

/*
 * Copyright (c) 2006-2009 by Dirk Riehle, http://dirkriehle.com
 *
 * This file is part of the Wahlzeit photo rating application.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public
 * License along with this program. If not, see
 * <http://www.gnu.org/licenses/>.
 */

package org.wahlzeit.model;

/**
 * Simple value object for case ids.
 */
public class CaseId {

	/**
	 *
	 */
	public static final CaseId NULL_ID = new CaseId(0);

	/**
	 *
	 */
	private final int id;

	/**
	 *
	 */
	public CaseId(int id) {
		this.id = id;
	}

	/**
	 *
	 */
	public int asInt() {
		return id;
	}

	/**
	 *
	 */
	public CaseId getNextId() {
		return new CaseId(id + 1);
	}

	/**
	 *
	 */
	@Override
	public int hashCode() {
		final int prime = 31;
		int result = 1;
		result = prime * result + id;
		return result;
	}

	/**
	 *
	 */
	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		CaseId other = (CaseId) obj;
		return id == other.id;
	}

	/**
	 *
	 */
	@Override
	public String toString() {
		return String.valueOf(id);
	}

}