DCI Quiz Example

gistfile1.cs

class FreeResponseQuizContext
{
    protected IEnumerable<Question> questions;

    FreeResponseQuizContext(Student student, QuizTemplate quizTemplate) {
        IEnumerable<QuestionTemplate> questionTemplates = quizTemplate.getQuestionTemplates();
        QuestionGenerator = questionTemplates;
        AnswerCalculator = questionTemplates;
        Student = student;
    }
   
    role QuestionGenerator {
        IEnumerable<Question> generate() {
            IEnumerable<QuestionTemplate> list = ((IEnumerable<QuestionTemplate>)self);           
            foreach (var questionTemplate in list) {
                //add each parsed question to the 'questions' context property
                //we're storing questions as a property of the context since we'll need them again
            }
            //return list of questions ready to display to the user
            return questions;
        }
    }
   
    role AnswerCalculator {
        //similar idea to QuestionGenerator; loop through questions, calculate answer for each,
        //and return the answers
        IDictionary<Question, Answer> calculateAndReturn() {
            ...
        }
    }
   
    role ScoreCalculator {
        ...
    }
   
    role Student {
        //might not need this, it's just an idea
        void answerQuestions() {
            ...
        }
    }
   
    interaction IEnumerable<Question> generateQuestions() {
        return QuestionGenerator.generate();
    }
   
    interaction IDictionary<Question, Answer> calculateAnswers() {
        return AnswerCalculator.calculateAndReturn();
    }
   
    //How well did the student do?
    interaction int calculateScore() {
        return ScoreCalculator.calculate();
    }
}

class MultipleChoiceQuizContext
{
    MultipleChoiceQuizContext(Student student, QuizTemplate quizTemplate) {
        ...
    }
   
    role MultipleChoiceGenerator {
        ...
    }

    interaction IDictionary<Question, IEnumerable<Answer>> generateQuestionsAndChoices() {
        //How to use QuestionGenerator?
        //Need to use it in conjunction with MultipleChoiceGenerator
        ...
    }
   
    interaction int calculateScore() {
        //How to use ScoreCalculator?
        ...
    }
}