questmanager.java

exam system for all developers

import java.util.*;
import java.awt.*;

class QuestManager {
Exam  GUI;
int iCurQuest=-1;
public int iQuestCount;   
//vQuestObs is a vector of Question Objects
private Vector vQuestObs;
//vQuestions is a vector of Question string arrays


private Vector vQuestions;

//Constructor
QuestManager(Vector v,Exam GUIParm){
  GUI = GUIParm;
  vQuestions=v;
  setupQuestions();
}

private void setupQuestions(){

   String[] sQText = new String[vQuestions.size()];
  //First two positions are for Question Text and Answer
  //the rest is for options

   vQuestObs = new Vector();

    for(int i=0;i< vQuestions.size();i++){
      try{
       sQText = (String[]) vQuestions.elementAt(i);
      } catch(Exception e) {System.out.println("Exception") ;}
         String[] saOpt=new String[(sQText.length -2 )];;
         for(int iOptCount = 2; iOptCount <sQText.length; iOptCount++){
         saOpt[iOptCount-2]=sQText[iOptCount];
    }
    Question q = new Question();
    q.setOptions(saOpt);
    q.setQuestionText(sQText[0]);

    q.setAnswer(sQText[1]);
    vQuestObs.addElement(q);

  }
  //Track when we are at the end of the Questions
  iQuestCount = vQuestObs.size();
}
public void getForward(){
      String sQuestion;
      Question q = new Question();
      //Have we got the first question?
      if(iCurQuest >-1){
        q= (Question) vQuestObs.elementAt(iCurQuest);
       //Get the current option settings
       q.setResponse(GUI.pOptButtons);
       //remove all of the option buttons
       GUI.pOptButtons.removeAll();
      }
       //Stay put if at the end of Questions
       if(iCurQuest < iQuestCount-1)
       {
       iCurQuest++;
         }
       q= (Question) vQuestObs.elementAt(iCurQuest);
       sQuestion=q.getQuestionText();

       //GUI.ta.replaceText(sQuestion,0,1000);
      //Blank out current contents
      GUI.ta.replaceText(sQuestion,0,GUI.ta.getText().length());

       int OptionLength = sQuestion.length();
       //String array of option labels
       String[] saOpt=q.getOptions();
       //Walk around the Option buttons
        setOptButtons(saOpt,q);
       //Stay put if this is the last Question
       GUI.ta.select(0,0);
       GUI.repaint();
       GUI.pOptButtons.validate();

}

public void setOptButtons(String[] saOpt, Question q){
       for( int iOptCount =0;iOptCount <saOpt.length;iOptCount++){
            boolean bChkState=false;
            //Get the current setting
            bChkState=q.getResponse(iOptCount);
            //Default is 5 options, if less dont add checkbox
            if(saOpt[iOptCount] !=null){
                Checkbox cb = new Checkbox();
                cb.setLabel(saOpt[iOptCount]);
                cb.setState(bChkState);
                GUI.pOptButtons.add(cb);
              }
            }
}
public void getBack(){
     String sQuestion;
      Question q = new Question();
       if(iCurQuest >0)
       {
       iCurQuest--;
       }
      q= (Question) vQuestObs.elementAt(iCurQuest);
      sQuestion=q.getQuestionText();
      //GUI.ta.replaceText(sQuestion,0,1000);

      //Blank out current contents
      GUI.ta.replaceText(sQuestion,0,GUI.ta.getText().length());

      int OptionLength = sQuestion.length();
       GUI.pOptButtons.removeAll();
       String[] saOpt=q.getOptions();
       setOptButtons(saOpt,q);
        //Stay put if this is the last Question
       GUI.ta.select(0,0);
       GUI.repaint();
       GUI.pOptButtons.validate();

  }
  public int getQuestCount(){
    return  iQuestCount;
  }


  public int getRightAnsCount(){
  boolean bRightAns=true;
  //Might get more performance by doing this only once
  int iQuestCount= vQuestObs.size();
  //Start off assuming every answer is correct
  int iRightAnsCount=iQuestCount;

  for(int i=0; i<iQuestCount;i++){
     Question q = (Question) vQuestObs.elementAt(i);
     boolean bAns[]= q.getAnswer();
     boolean bRes[]=q.getResponse();
    bRightAns=true;

     //Compare each element of the array of booleans
     for(int j=0; j< bAns.length; j++){
        if(bAns[j]!=bRes[j]){
          bRightAns=false;
          }
      }
      //Do this once for eqch question
      if(bRightAns==false)
        iRightAnsCount--;
    }
    //System.out.println("Right ans count = " + iRightAnsCount);
    return iRightAnsCount;
   }

   public boolean[] getRightAns(int iQuestNo){
        Question q = (Question) vQuestObs.elementAt(iQuestNo);
        boolean[] baAns=q.getAnswer();
        return baAns;
   }

   public boolean getAnsweredRight(int iQuestNo){
     Question q = (Question) vQuestObs.elementAt(iQuestNo);
     boolean bAnsRight = q.getAnsweredRight();
     return  bAnsRight;
   }


   public boolean getAtttempted(int iQuestNo){
        //See if any attempt has been
        //made to answer this question
          Question q = (Question) vQuestObs.elementAt(iQuestNo);
         return q.getAttempted();
         }
         
public int getAttemptedCount(){
  int iAttemptedCount=0;
  for(int i=0; i<iQuestCount;i++){
          Question q = (Question) vQuestObs.elementAt(i);
          if(q.getAttempted()){
              iAttemptedCount++;
              }//End if
               //System.out.println("Attempted Count = " + iAttemptedCount);
       }//End for
   return iAttemptedCount;
  }


}