private IQuestionType GetQuestionType(QlParser.QuestionContext question)
{
switch (question.questionType().chosenType.Type)
{
case QlParser.BOOLTYPE: return(new BooleanQuestionType());
case QlParser.STRINGTYPE: return(new StringQuestionType());
case QlParser.INTTYPE: return(new IntegerQuestionType());
case QlParser.DATETYPE: return(new DateQuestionType());
case QlParser.DECIMALTYPE: return(new DecimalQuestionType());
default:
throw new ParserException(
$@"QuestionType '{question.questionType().chosenType.Type}' handled in the parse tree but not by the AST",
null);
}
}
public override AstNode VisitQuestion([NotNull] QlParser.QuestionContext context)
{
var id = context.Identifier().GetText();
var label = new StringLiteral(context.label.Text);
var type = context.Type().GetText();
var computedValue = context.expression();
Expression value = null;
if (computedValue != null)
{
value = this.Visit(context.expression()) as Expression;
}
switch (type)
{
case "boolean":
return(new QuestionStatement(id, new BooleanValueType(), label, value));
case "integer":
return(new QuestionStatement(id, new IntegerValueType(), label, value));
case "decimal":
return(new QuestionStatement(id, new DecimalValueType(), label, value));
case "money":
return(new QuestionStatement(id, new MoneyValueType(), label, value));
case "string":
return(new QuestionStatement(id, new StringValueType(), label, value));
case "date":
return(new QuestionStatement(id, new DateValueType(), label, value));
default:
throw new ArgumentOutOfRangeException(nameof(type), "Invalid question type.");
}
}