abstractentitybean.java

来自「老外的在线考试」· Java 代码 · 共 106 行

/*
 * SchoolEJB - CyberDemia's library of EJBs for educational related services.
 * 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.school.impl;
import javax.ejb.*;
import java.util.logging.*;


/**
* AbstractEntityBean is an abstract base class for entity beans.
* It cannot be specified as an entity bean itself because
* it does not define the create methods.
* Subclasses must define appropriate create methods to be used
* as EntityBeans.
*
* @author Alexander Yap
*/
public abstract class AbstractEntityBean implements EntityBean
{
	
	/**
	 * Gets the unique ID of this object.
	 * @return Unique ID
	 */
	public abstract String getId();

	/**
	 * Sets the unique ID of this object.
	 * @param id Unique ID
	 */
	public abstract void setId(String id);

	/**
	* Gets the name intended for display in user interface.
	* It is a persistent attribute.
	* @return Name of this object.
	*/
	public abstract String getName();
	
	/**
	* Sets the name intended for display in user interface.
	* It is a persistent attribute.
	* @param  nm  Name of this object.
	*/
	public abstract void setName(String nm);


	//-----------------------------
	// Container methods. Override in subclasses if appropriate.
	//-----------------------------
	
	public void setEntityContext(EntityContext ctx)
	{ 
		m_ctx = ctx;
	}

	public EntityContext getEntityContext()
	{
		return m_ctx;
	}

	public void ejbActivate() 
	{ 
		s_logger.log( Level.FINEST, "Activating "+getClass().getName());
	}
	public void ejbPassivate() 
	{ 
		s_logger.log( Level.FINEST, "Passivating "+getClass().getName());
	}
	public void ejbLoad() 
	{ 
		s_logger.log( Level.FINEST, "Loading "+getClass().getName());
	}
	public void ejbStore()
	{ 
		s_logger.log( Level.FINEST, "Storing "+getClass().getName());
	}
	public void ejbRemove() 
	{ 
		s_logger.log( Level.FINEST, "Removing "+getClass().getName());
	}
	
	private EntityContext m_ctx;
	private static Logger s_logger = Logger.getLogger(AbstractEntityBean.class.getName());

}