localanswerhistoryrecord.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 java.util.Date;

/**
 * 
 * LocalAnswerHistoryRecord is the local interface to a
 * AnswerHistoryRecordBean instance that stores a historical
 * record of a user's answer to a specific question in a specifc test.
 * 
 * @author Alexander Yap
 */
public interface LocalAnswerHistoryRecord extends EJBLocalObject
{
	/**
	* Gets the User ID of this history record.
	* @return User ID.
	*/
	public String getUserId();

	/**
	* Gets the Test ID of this history record.
	* @return Test ID.
	*/
	public String getTestId();

	/**
	* Gets the Question ID of this history record.
	* @return Question ID.
	*/
	public String getQuestionId();

	/**
	 * Gets the index of the question within its owner test.
	 * @return Question's index within its test.
	 */
	public int getQuestionIndex();
	
	/**
	 * Gets the score of the question. This is the score awarded to the
	 * user if the user's answer is correct.
	 * @return Question's score
	 */
	public int getQuestionScore();
	
	/**
	 * Checks if the user answered the question correctly.
	 * @return true if the user answered the question correctly, otherwise false.
	 */
	public boolean isAnswerCorrect();
	
	/**
	 * Gets the score actually awarded to the user for this question.
	 * @return Score awarded to the user.
	 */
	public int getUserScore();
	
	/**
	 * Gets the user's answer to the question.
	 * @return User's answer
	 */
	public int getUserAnswer();
	
	/**
	 * Gets the correct answer to the question.
	 * @return Question's correct answer.
	 */
	public int getCorrectAnswer();
	
	/**
	 * Gets the timestamp when the user answered the question.
	 * @return Timestamp when the user answered the question.
	 */
	public Date getTimestamp();

}