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 Expression VisitNegation(QLParser.NegationContext context)
{
Expression operand = context.expr().Accept(this);
Operation operation = StringEnum.GetEnumerationValue <Operation>(context.GetChild(0).GetText());
return(new Negation(operation, operand, context.GetTextPosition()));
}
public override Expression VisitOr(QLParser.OrContext context)
{
Expression left = context.expr(0).Accept(this);
Expression right = context.expr(1).Accept(this);
Operation operation = StringEnum.GetEnumerationValue <Operation>(context.GetChild(1).GetText());
return(new Or(operation, left, right, context.GetTextPosition()));
}
public override DefaultStyle VisitDefaultStyle(QLSParser.DefaultStyleContext context)
{
DataType dataType = StringEnum.GetEnumerationValue <DataType>(context.TYPE().GetText());
var styleAttributes = new List <StyleAttribute>();
foreach (var styleAttributeContext in context.style_attr())
{
styleAttributes.Add(styleAttributeContext.Accept(new StyleAttributeBuilder()));
}
return(new DefaultStyle(dataType, styleAttributes, context.GetTextPosition()));
}
public override Expression VisitEquality(QLParser.EqualityContext context)
{
Expression left = context.expr(0).Accept(this);
Expression right = context.expr(1).Accept(this);
Operation operation = StringEnum.GetEnumerationValue <Operation>(context.GetChild(1).GetText());
switch (operation)
{
case Operation.EqualTo:
return(new EqualTo(operation, left, right, context.GetTextPosition()));
case Operation.NotEqualTo:
return(new NotEqualTo(operation, left, right, context.GetTextPosition()));
default:
throw new NotSupportedException("Unexpected operator symbol encountered.");
}
}