package cz.muni.fi.bronchus.questions;

import java.util.Vector;

/**
 * Standard Multiple Choice question, with some amount of answers and one is correct
 * @author Tomáš Udržal
 */
public class MultipleChoiceQuestion extends Question {
    
    /**
     * correct answer indexed as the letter 'A'..'Z'
     */
    protected String correctAnswer;

    /**
     * Vector of answers
     */
    private Vector answers;
    
    /**
     * Shuffle order of answers
     */
    private boolean shuffle;
    
    /** Creates a new instance of MultipleChoiceQuestion */
    public MultipleChoiceQuestion() {
        super("Multiple Choice");
        correctAnswer="";
        answers=new Vector();
        shuffle=false;
    }
    
    /**
     * Setter method for the correct answer
     * @param x letter 'A'..'Z'
     */
    public void setCorrectAnswer(String x) { correctAnswer=x; }
    
    /**
     * Getter method for the correct answer
     * @return letter 'A'..'Z'
     */
    public String getCorrectAnswer() { return correctAnswer; }

    /**
     * Adds an answer to the end of the Vector
     * @param x answer to be added
     */
    public void addAnswer(String x) { answers.add(x); }
    
    /**
     * Getter method for the Vector of answers
     * @return Vector of answers
     */
    public Vector getAnswers() { return answers; }

    /**
     * Setter method for the shuffle order of answers
     * @param x true if shuffle is enabled otherwise false
     */
    public void setShuffle(boolean x) { shuffle=x; }
    
    /**
     * Getter method for the shuffle order of answers
     * @return true if shuffle is enabled otherwise false
     */
    public boolean isShuffle() { return shuffle; }

    /**
     * Method for generating a response processing condition from a selected answers
     * @return response processing condition
     */
    public String generateCondition() {
        String s=null;
        s=correctAnswer+"==true";
        return s;
    } 

}