org.apache.poi.ss.formula.eval
Interfaces 
AreaEval
NumericValueEval
RefEval
StringValueEval
ValueEval
Classes 
AreaEvalBase
BlankEval
BoolEval
ConcatEval
ErrorEval
FunctionEval
IntersectionEval
MissingArgEval
NameEval
NameXEval
NumberEval
OperandResolver
PercentEval
RangeEval
RefEvalBase
RelationalOperationEval
StringEval
TwoOperandNumericOperation
UnaryMinusEval
UnaryPlusEval
Exceptions 
EvaluationException
NotImplementedException