public override Statement VisitQuestion(QLParser.QuestionContext context)
{
DataType type = StringEnum.GetEnumerationValue <DataType>(context.TYPE().GetText());
Identifier id = new Identifier(context.ID().GetText(), context.GetTextPosition());
string label = context.STRING().GetText();
Expression expression = null;
// Remove the leading and trailing '"' characters from the string literal.
label = label.Trim('"');
if (context.expr() != null)
{
expression = context.expr().Accept(new ExpressionBuilder());
}
switch (type)
{
case DataType.Boolean:
return(new BooleanQuestion(id, label, expression, context.GetTextPosition()));
case DataType.Date:
return(new DateQuestion(id, label, expression, context.GetTextPosition()));
case DataType.Integer:
return(new IntegerQuestion(id, label, expression, context.GetTextPosition()));
case DataType.String:
return(new StringQuestion(id, label, expression, context.GetTextPosition()));
default:
string message = String.Format("Data type '{0}' is not supported for questions.");
throw new NotSupportedException(message);
}
}
public override INode VisitQuestion([NotNull] QLParser.QuestionContext context)
{
var identifier = context.Identifier().GetText();
var body = context.StringLiteral().GetText();
body = Utility.String.TrimQuotes(body);
IType type = GetTypeFromString(context.Type().GetText());
return(new Question(identifier, body, type));
}
public override AstNode VisitQuestion([NotNull] QLParser.QuestionContext context)
{
var question = new Question
{
Id = context.ID().GetText(),
Text = StripQuotes(context.QUOTED_STRING().GetText()),
Type = context.type().Accept(this) as BaseType
};
return(question);
}
private Type GetQuestionType(QLParser.QuestionContext question)
{
switch (question.questionType().chosenType.Type)
{
case QLParser.BOOLTYPE: return(typeof(bool));
case QLParser.STRINGTYPE: return(typeof(string));
case QLParser.INTTYPE: return(typeof(int));
case QLParser.DATETYPE: return(typeof(DateTime));
case QLParser.DECIMALTYPE: return(typeof(decimal));
default:
throw new QlParserException(
$@"QuestionType '{question.questionType().chosenType.Type}' handled in the parse tree but not by the AST",
null);
}
}
