answerchoicebean.java

老外的在线考试

/*
 * 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;

import javax.ejb.*;
import com.cyberdemia.ejb.BaseEntityBean;

/**
 * AnswerChoiceBean represents one of the choices in a
 * multiple-choice question.
 * 
 * @ejb.bean name="AnswerChoiceBean"
 *           type="CMP"
 *           view-type="local"
 *           schema="AnswerChoice"
 *           cmp-version="2.x"
 *           primkey-field="id"
 *           local-jndi-name="ejb/LocalAnswerChoice"
 *
 * @ejb.util generate="physical"
 * @ejb.interface local-class="com.cyberdemia.school.LocalAnswerChoice" local-extends="javax.ejb.EJBLocalObject"
 * @ejb.home local-class="com.cyberdemia.school.LocalAnswerChoiceHome" local-extends="javax.ejb.EJBLocalHome"
 * @ejb.pk class="java.lang.Integer"
 * @ejb.persistence table-name="AnswerChoice"
 *
 * @jboss.method-attributes pattern="get*" read-only="true"
 *
 * @jboss.unknown-pk class="java.lang.Integer" auto-increment="true" jdbc-type="INTEGER" sql-type="INTEGER"
 * @jboss.entity-command name="mysql-get-generated-keys"
 * @jboss.container-configuration name="CyberDemia Optimized Standalone CMP"
 *
 * @author Alexander Yap
 * @version $Revision: 1.5 $ at $Date: 2004/06/20 10:17:44 $ by $Author: alexycyap $
 */
public abstract class AnswerChoiceBean extends BaseEntityBean
{
	
	/**
	 * Gets the ID (primary key) of this answer choice.
	 *
	 * @ejb.persistence
	 * @ejb.pk-field
	 * @ejb.interface-method
	 * @jboss.persistence auto-increment="true"
	 *
	 * @return ID of this answer choice.
	 */
	public abstract Integer getId();

	/**
	 * Sets the ID (primary key) of this answer choice.
	 * @param id ID of this answer choice.
	 */
	public abstract void setId(Integer id);
	
	/**
	 * Gets index of this answer choice within the owner Question.
	 *
	 * @ejb.interface-method
	 * @ejb.persistence
	 *
	 * @return Index of this answer choice.
	 */
	public abstract int getAnswerIndex();
	
	/**
	 * Sets index of this answer choice within the owner Question.
	 *
	 * @ejb.interface-method
	 *
	 * @param index Index of this answer choice.
	 */
	public abstract void setAnswerIndex(int index);
	
	/**
	 * Gets the text of this answer choice.
	 *
	 * @ejb.interface-method
	 * @ejb.persistence
	 *
	 * @return Text of this answer choice.
	 */
	public abstract String getAnswerText();
	
	/**
	 * Sets the text of this answer choice.
	 *
	 * @ejb.interface-method
	 *
	 * @param text Text of this answer choice.
	 */
	public abstract void setAnswerText(String text);

	/**
	* Gets the question that this answer choice belongs to.
	*
	* @ejb.interface-method
	* @ejb.relation name="question-answerChoices" role-name="answerChoice-belongs-to-question" target-ejb="QuestionBean" target-role-name="question-has-answerChoices" target-multiple="yes" cascade-delete="yes"
	* @jboss.relation fk-constraint="yes" related-pk-field="id" fk-column="questionId"
	*
	* @return The question unique Id.
	*/
	public abstract LocalQuestion getQuestion();

	/**
	* Sets the Question that this answer choice belongs to.
	*
	* @param quesId The question unique Id.
	*/
	public abstract void setQuestion(LocalQuestion quesId);

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

	/**
	* Creates an AnswerChoice.
	*
	* @ejb.create-method view-type="local"
	*/
	public Integer ejbCreate( int index, String text ) throws CreateException
	{
		// Note : Unique ID is assigned by database auto-increment
		setAnswerIndex(index);
		setAnswerText(text);
		return null;
	}

	public void ejbPostCreate( int index, String text )
	{
        // Nothing here
	}


}