package net.sourceforge.fenixedu.domain.tests.predicates;

import java.util.HashMap;

import net.sourceforge.fenixedu.domain.Person;
import net.sourceforge.fenixedu.domain.tests.NewMultipleChoiceQuestion;
import net.sourceforge.fenixedu.domain.tests.NewQuestion;
import net.sourceforge.fenixedu.presentationTier.Action.teacher.tests.PredicateBean;

public class MultipleChoiceCountPredicate extends AtomicPredicate implements Predicate {
    private final int count;

    public MultipleChoiceCountPredicate(int count) {
	super();

	this.count = count;
    }

    public MultipleChoiceCountPredicate(PredicateBean predicateBean) {
	this(predicateBean.getCount());
    }

    public int getCount() {
	return count;
    }

    public boolean evaluate(NewQuestion question, Person person) {
	NewMultipleChoiceQuestion multipleChoiceQuestion = (NewMultipleChoiceQuestion) question;

	if (!multipleChoiceQuestion.isAnswered(person)) {
	    return false;
	}

	return multipleChoiceQuestion.getMultipleChoiceAnswer(person).size() == count;
    }

    public boolean uses(Object object) {
	return false;
    }

    public Predicate transform(HashMap<Object, Object> transformMap) {
	return new MultipleChoiceCountPredicate(getCount());
    }

}