resourcereferencebean.java

老外的在线考试

/*
 * UserEJB - CyberDemia's User management library implemented using EJBs.
 * Copyright (C) 2003 CyberDemia Research and Services
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library 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
 * Library General Public License for more details.
 * 
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA  02111-1307, USA.
 *
 * See the COPYING file located in the top-level-directory of
 * the archive of this library for complete text of license.
 */
package com.cyberdemia.user.impl;
import javax.ejb.*;
import com.cyberdemia.user.*;

/**
 * 
 * ResourceReferenceBean is the implementation of a reference to a
 * User resource. A User may be associated with any number of 
 * arbitrary resources 
 * (such as home address, postal address, birthday, pet names, etc...)
 * using this resource reference mechanism.
 * A resource is categorized by a category key that gives it a certain
 * meaning to the User. For example, category keys may be 
 * "homeAddress", "postalAddress", "petName", etc. 
 * Each category key may be associated with one or more resources.
 * For example, a User may have one associated resource of category "homeAddress",
 * but multiple resources of category "petName".
 * Each resource must be identifiable by a unique resource ID, such as
 * the primary key to its record in a database.
 * It is up to the client code to figure out how to access the referenced resource.
 *  
 * @author Alexander Yap
 */
public abstract class ResourceReferenceBean extends AbstractEntityBean
{
	/**
	* Sets the category key.
	* The category key is used to logically group resources associated with a user.
	* @param key Resource category key.
	*/
	public abstract void setCategoryKey(String key);

	/**
	* Gets the category key.
	* The category key is used to logically group resources associated with a user.
	* @return The resource category key.
	*/
	public abstract String getCategoryKey();

	/**
	* Sets the unique ID of the referenced resource.
	* @param id The resource unique ID.
	*/
	public abstract void setResourceId(String id);

	/**
	* Gets the unique ID of the referenced resource.
	* @return The resource unique ID.
	*/
	public abstract String getResourceId();


	//-----------------------------
	// Create methods.
	//-----------------------------

	public ResourceReferenceKey ejbCreate( String catKey, String resId ) throws CreateException
	{
		setCategoryKey(catKey);
		setResourceId( resId);
		return null;
	}

	public void ejbPostCreate( String catKey, String resId )
	{
	}
	
}