gettestevent.java

一个在线学习系统的服务端SERVLET程序

package eols.event.test;

/**
 * <p>Title: Test history query event </p>
 * <p>Description: It is used to search test history </p>
 * <p>Copyright: Copyright (c) 2005</p>
 * <p>Company: </p>
 * @author Fasheng Qiu
 * @version 1.0
 */
import java.util.*;
import javax.servlet.*;
import javax.servlet.http.*;

import eols.bean.system.*;
import eols.bean.test.*;
import eols.tools.*;
import eols.algorithm.*;
import eols.event.system.*;
import eols.logic.test.*;
import eols.storage.user.*;

public class GetTestEvent
    extends QuestionEventHandlerBase {
    /**
     * 事件的处理逻辑
     */
    public void process(ServletContext sc, HttpServletRequest request,
                        HttpServletResponse response, HashMap bean) {
        String loginID = SessionUtils.getStringSessionAttribute(request,
            "loginID", null);
        if (loginID == null) {
            throw new RuntimeException(
                "Can not get your login information, please login");
        }
        // test results
        Map param = new HashMap();
        param.put("type", "GETTESTOFUSER");
        param.put("loginID", loginID);
        param.put("testID", request.getParameter("testID"));
        List testList = (List)super.iTran.process(param);
        param = new HashMap();
        param.put("type", "GETQUESTIONSOFTEST");
        param.put("list", testList);
        testList = (List)super.iTran.process(param);
        // populate request attributes
        int wrongNo = 0;
        StringBuffer correctA = new StringBuffer();
        StringBuffer yourA = new StringBuffer();
        List questions = new ArrayList(testList.size());
        for (int i = 0; i < testList.size(); i++) {
            TestResult tr = (TestResult)testList.get(i);
            if (!tr.isCorrect())
                wrongNo++;
            correctA.append(tr.getQuestion().getAnswer()).append(',');
            if (tr.isCorrect())
                yourA.append(tr.getQuestion().getAnswer()).append(',');
            else
                yourA.append(tr.getYourA()).append(',');
            tr.getQuestion().setYourA(tr.isCorrect() ? tr.getQuestion().getAnswer(): tr.getYourA());
            questions.add(tr.getQuestion());
        }
        int correctNo = testList.size() - wrongNo;
        request.setAttribute("wrong", wrongNo+"");
        request.setAttribute("correct", correctNo+"");
        request.setAttribute("yourA", yourA.toString());
        request.setAttribute("correctA", correctA.toString());
        request.setAttribute("questions", questions);
    }

}