public StringLookupComparer(StringEval se)
: base(se)
{
_value = se.StringValue;
}
/**
* uses the relevant flags to decode the StringEval
* @param eval
*/
private ValueEval XlateRefStringEval(StringEval sve)
{
if ((flags & REF_STRING_IS_PARSED) > 0)
{
String s = sve.StringValue;
double d = OperandResolver.ParseDouble(s);
if (double.IsNaN(d))
{
return ErrorEval.VALUE_INVALID;
}
return new NumberEval(d);
}
// strings are blanks
return BlankEval.instance;
}
/**
* When the second argument is a string, many things are possible
*/
private static I_MatchPredicate CreateGeneralMatchPredicate(StringEval stringEval)
{
String value = stringEval.StringValue;
CmpOp operator1 = CmpOp.GetOperator(value);
value = value.Substring(operator1.Length);
bool? booleanVal = ParseBoolean(value);
if (booleanVal != null)
{
return new BooleanMatcher(booleanVal.Value, operator1);
}
Double doubleVal = OperandResolver.ParseDouble(value);
if (!double.IsNaN(doubleVal))
{
return new NumberMatcher(doubleVal, operator1);
}
ErrorEval ee = ParseError(value);
if (ee != null)
{
return new ErrorMatcher(ee.ErrorCode, operator1);
}
//else - just a plain string with no interpretation.
return new StringMatcher(value, operator1);
}
/**
* uses the relevant flags to decode the StringEval
* @param eval
*/
private ValueEval XlateStringEval(StringEval eval)
{
if ((flags & STRING_IS_PARSED) > 0)
{
String s = eval.StringValue;
double d = OperandResolver.ParseDouble(s);
if (double.IsNaN(d))
{
return ErrorEval.VALUE_INVALID;
}
return new NumberEval(d);
}
// strings are errors?
if ((flags & STRING_IS_INVALID_VALUE) > 0)
{
return ErrorEval.VALUE_INVALID;
}
// ignore strings
return XlateBlankEval(BLANK_IS_PARSED);
}
