EntityModel.java

/**
 *     Copyright SocialSite (C) 2009
 *
 *     This program is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU 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 General Public License for more details.
 *
 *     You should have received a copy of the GNU General Public License
 *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package com.socialsite.entitymodel;

import com.socialsite.dao.AbstractDao;
import com.socialsite.persistence.AbstractDomain;

/**
 * Generic LodableDetachable Model for all the Domain class in the Application
 * 
 * @author Ananth
 */
public class EntityModel<T extends AbstractDomain> extends AbstractEntityModel<T>
{

	private static final long serialVersionUID = 1L;
	/** DAO to load the domanin object */
	private final AbstractDao<T> dao;

	/**
	 * creates a detachable Domain object
	 * 
	 * @param domain
	 *            detachable Domain object
	 * @param dao
	 *            Dao to acces the Domain object
	 */
	public EntityModel(final T domain, final AbstractDao<T> dao)
	{
		super(domain);
		this.dao = dao;
	}

	/**
	 * returns the Domain if available or fetch it from the database
	 * 
	 * @return Domain
	 */
	@Override
	protected T load()
	{
		if (domain == null)
		{
			domain = dao.load(id);
		}
		return domain;
	}
}