baseentitybean.java

来自「老外的在线考试」· Java 代码 · 共 94 行

/*
 * Core - Library of useful classes that are used in many CyberDemia projects.
 * Copyright (C) 2004 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.ejb;

import java.rmi.RemoteException;
import javax.ejb.*;

/**
 * BaseEntityBean is an abstract base class for all other entity EJBs.
 * It simply provides dummy implementations for the container methods.
 * It doesn't define any fields, not even a primary key. 
 * Applications that need a more featured abstract EJB to extend from should
 * look at SimpleEntityBean. 
 *
 * @ejb.bean name="BaseEntityBean"
 *           generate="false"
 *           type="CMP"
 *           view-type="local"
 *
 * @author Alexander Yap
 * @version $Revision: 1.5 $ at $Date: 2004/06/20 16:15:48 $ by $Author: alexycyap $
 */
public abstract class BaseEntityBean implements EntityBean
{
	//-----------------------------
	// Container methods. These are dummy implementations.
	//-----------------------------

	public EntityContext getEntityContext()
	{
		return m_entityContext;
	}

	public void setEntityContext(EntityContext arg0)
		throws EJBException, RemoteException
	{
		m_entityContext = arg0;
	}

	public void unsetEntityContext()
		throws EJBException, RemoteException
	{
		m_entityContext = null;
	}

	public void ejbActivate() throws EJBException, RemoteException
	{
        // To be overridden by subclass if required.
	}

	public void ejbLoad() throws EJBException, RemoteException
	{
        // To be overridden by subclass if required.
	}

	public void ejbPassivate() throws EJBException, RemoteException
	{
        // To be overridden by subclass if required.
	}

	public void ejbRemove() throws RemoveException, EJBException, RemoteException
	{
        // To be overridden by subclass if required.
	}

	public void ejbStore() throws EJBException, RemoteException
	{
        // To be overridden by subclass if required.
	}

	private EntityContext m_entityContext = null;

}