viewresultsaction.java

老外的在线考试

/*
 * CyberTester - J2EE Web application for creating, delivering and managing tests/exams/surveys. 
 * Copyright (C) 2004 CyberDemia Research and Services Pty Ltd
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program (see the file COPYING); 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 program for complete text of license.
 */
package com.cyberdemia.cybertester.testee.test;

import javax.servlet.*;
import javax.servlet.http.*;
import org.apache.struts.action.*;
import com.cyberdemia.school.*;
import com.cyberdemia.cybertester.*;
import com.cyberdemia.cybertester.testee.TesteeConstants;
import java.util.logging.*;
import java.util.*;
import com.cyberdemia.cybertester.AbstractUserAction;

/**
 * ViewResultsAction is a Struts action to load the results of a test
 * that a user has taken.
 * 
 * @version $Revision: 1.1 $ at $Date: 2004/03/15 09:48:53 $ by $Author: alexycyap $
 * @author Alexander Yap
 */
public class ViewResultsAction extends AbstractUserAction
{

	protected ActionForward doPerform(
		ActionMapping mapping, ActionForm form,
		HttpServletRequest request, HttpServletResponse response,
		HttpSession session) throws Exception	
	{
		Logger logger = CyberTesterUtils.getLogger();
		Integer userId = (Integer)session.getAttribute(Constants.USER_ID_KEY);
		Integer testId = CyberTesterUtils.getIntegerParameterOrRequestAttribute(request, TesteeConstants.TEST_ID_KEY);
		if (testId==null)
		{
			throw new ServletException("Missing parameter or request attribute "+TesteeConstants.TEST_ID_KEY);
		}
		String forwardTarget = Constants.SUCCESS;
		try
		{
			TestManagerHome tMgrHome = CyberTesterUtils.getTestManagerHome();
			TestManager testMgr = (TestManager)tMgrHome.create();
			TestData testData = testMgr.getTestData(testId);
			if (testData!=null)
			{
				if (testData.isSuppressTestEndFeedback())
				{
					forwardTarget = "suppress";
				}
				else
				{
					ScoreData scoreData = testMgr.getTestScoreForUser(testId, userId, false);
					request.setAttribute( TesteeConstants.TEST_RESULTS_KEY, 
						new TesteeTestData(testData, scoreData )
					);
					if (scoreData.isPassed())
					{
						request.setAttribute( TesteeConstants.PASSED_TEST_KEY, Boolean.TRUE);
					}
					
					if (scoreData.isExceededTestTime())
					{
						request.setAttribute( TesteeConstants.TEST_TIMED_OUT_KEY, Boolean.TRUE);
					}
					
					ReportGeneratorHome reportGenHome = CyberTesterUtils.getReportGeneratorHome();
					ReportGenerator reportGen = (ReportGenerator)reportGenHome.create();
					List historyList = reportGen.getAnswerHistory(testId, userId);
					Collections.sort(historyList, new AnswerHistoryIndexComparator());
					request.setAttribute( TesteeConstants.ANSWER_HISTORY_LIST_KEY, historyList);
				}
			}
			else
			{
				logger.warning("Cannot find data for Test "+testId);
			}
		}
		catch (Exception ex)
		{
			logger.log(Level.SEVERE, "Error retrieving test "+testId+" for user "+userId, ex);
			throw ex;
		}
		
		
		return mapping.findForward(forwardTarget);
	}

}

class AnswerHistoryIndexComparator implements Comparator
{
	public int compare(Object o1, Object o2)
	{
		if ((o1 instanceof AnswerHistoryData) && (o2 instanceof AnswerHistoryData))
		{
			return ((AnswerHistoryData)o1).getQuestionIndex()-((AnswerHistoryData)o2).getQuestionIndex();
		}
		return 0;  // This never happens
	}
}