protected virtual void EmitNot(NPathNotExpression notExpression)
{
Write("(not "); // do not localize
EmitExpression(notExpression.Expression);
Write(")");
}
private SqlExpression EvalNot(NPathNotExpression notExpression)
{
SqlExpression expression = (SqlSearchCondition) EvalExpression(notExpression.Expression) ;
SqlSearchCondition search = expression as SqlSearchCondition ;
if (search != null)
search.Negative = true;
return expression;
}
protected virtual bool EvalNotExpression(object item, NPathNotExpression notExpression)
{
return !EvalExpression(item, notExpression.Expression);
}
private IValue ParseExpression()
{
if (tokenizer.GetCurrentToken().IsType("not"))
{
tokenizer.MoveNext(); // move past not
NPathNotExpression not = new NPathNotExpression();
not.Expression = ParseExpression();
return not;
}
if (CurrentIsValue())
{
IValue operand = ParseValue();
IValue expression = null;
if (tokenizer.GetCurrentToken().IsType("between"))
{
expression = ParseBetweenExpression(operand);
return expression;
}
if (tokenizer.GetCurrentToken().IsType("in"))
{
expression = ParseInExpression(operand);
return expression;
}
if (tokenizer.GetCurrentToken().IsType("math") || tokenizer.GetCurrentToken().IsType("compare") /* ||
tokenizer.GetCurrentToken().IsType("boolop")*/)
{
expression = ParseOperator(operand);
return expression;
}
if (tokenizer.GetCurrentToken().IsType(")"))
{
expression = operand;
return expression;
}
if (tokenizer.GetCurrentToken().IsType("as"))
{
expression = operand;
return expression;
}
if (tokenizer.GetCurrentToken().IsType("]"))
{
expression = operand;
return expression;
}
if (tokenizer.GetCurrentToken().IsType("direction"))
{
expression = operand;
return expression;
}
return operand;
}
throw GetUnknownTokenException();
}
