/// <summary>
/// 根据题目类型，构建一个答案项反序化处理器
/// </summary>
/// <param name="questionType"></param>
/// <returns></returns>
private AnswerDeserializeHandler CreateDeserializeHandler(QuestionType questionType)
{
AnswerDeserializeHandler _handler = default(AnswerDeserializeHandler);
switch (questionType)
{
case QuestionType.SINGLE_CHOICE:
_handler = new SingleChoiceDeserializeHandler();
break;
case QuestionType.MULTIPLE_CHOICE:
_handler = new MultipleChoiceDeserializeHandler();
break;
case QuestionType.TRUE_OR_FALSE:
_handler = new TrueOrFalseDeserializeHandler();
break;
case QuestionType.GAP_FILLING:
_handler = new GapFillingDeserializeHandler();
break;
case QuestionType.ESSAY_QUESTION:
_handler = new EssayQuestionDeserializeHandler();
break;
}
return(_handler);
}
/// <summary>
/// 初始化一个<see cref="AnswerDeserializeContext"/>对象实例
/// </summary>
/// <param name="questionType">需要反序列化的答案项所属题目的类型</param>
public AnswerDeserializeContext(QuestionType questionType)
{
handler = CreateDeserializeHandler(questionType);
}
/// <summary>
/// 初始化一个<see cref="AnswerDeserializeContext"/>对象实例
/// </summary>
/// <param name="questionType">需要反序列化的答案项所属题目的类型(枚举：<see cref="QuestionType"/>)</param>
public AnswerDeserializeContext(int questionType)
{
QuestionType type = (QuestionType)Enum.Parse(typeof(QuestionType), questionType.ToString());
handler = CreateDeserializeHandler(type);
}