package com.elan.forum.factory;

import com.elan.forum.dao.UserDAO;
import com.elan.forum.impl.ElanUserDAOImpl;
/**
 * ForumUserDAO工廠
 * 
 * @author Elan
 *
 */
public class UserDAOFactory {
	private static UserDAO userDAO= null;
	/**
	 * 
	 * @return 由Elan實現的ForumUserDAO
	 */
	public static UserDAO getForumUserDAO() {
		if(1 == 1) {//Elan 的DAO 實現
			if(userDAO == null) {
				userDAO = ElanUserDAOImpl.newInstance();
			}
		} else {
			//擴展ForumUserDAO
		}
		return userDAO;
	}
	
}