org.pentaho.reporting.libraries.formula.function

Interface Function

All Superinterfaces:

Serializable

All Known Implementing Classes:

AbsFunction, AcosFunction, AcoshFunction, AndFunction, ArrayConcatenateFunction, ArrayContainsFunction, ArrayLeftFunction, ArrayMidFunction, ArrayRightFunction, AscFunction, AsinFunction, Atan2Function, AtanFunction, AverageAFunction, AverageFunction, BeginsWithFunction, CharFunction, ChooseFunction, CleanFunction, CodeFunction, ConcatenateFunction, ContainsFunction, CosFunction, CountAFunction, CountBlankFunction, CountFunction, CsvArrayFunction, CsvTextFunction, DateDifFunction, DateFunction, DateTimeValueFunction, DateValueFunction, DayFunction, DaysFunction, DollarFunction, EndsWithFunction, EqualsFunction, ErrorFunction, EvenFunction, ExactFunction, ExpFunction, FalseFunction, FindFunction, FixedFunction, HasChangedFunction, HourFunction, IfFunction, IfNaFunction, IndexFunction, InFunction, IntFunction, IsBlankFunction, IsErrFunction, IsErrorFunction, IsEvenFunction, IsLogicalFunction, IsNaFunction, IsNonTextFunction, IsNumberFunction, IsOddFunction, IsRefFunction, IsTextFunction, LeftFunction, LenFunction, LikeFunction, LnFunction, Log10Function, LogFunction, LookupFunction, LowerFunction, MaxAFunction, MaxFunction, MessageFunction, MidFunction, MinAFunction, MinFunction, MinuteFunction, ModFunction, MonthEndFunction, MonthFunction, NaFunction, NFunction, NormalizeArrayFunction, NotFunction, NowFunction, NullFunction, OddFunction, OrFunction, ParseDateFunction, PiFunction, PowerFunction, PrevWeekdayFunction, ProperFunction, ReplaceFunction, ReptFunction, RightFunction, SearchFunction, SecondFunction, SequenceQuoterFunction, SinFunction, SqrtFunction, StringCountFunction, SubstituteFunction, SumAFunction, SumFunction, TextFunction, TFunction, TimeFunction, TimeValueFunction, TodayFunction, TrimFunction, TrueFunction, UnicharFunction, UnicodeFunction, UpperFunction, URLEncodeFunction, ValueFunction, VarFunction, WeekDayFunction, XorFunction, YearFunction, YesterdayFunction

public interface Function
extends Serializable

A function is an arbitary computation. A return value type is not available unless the function has been evaluated.

Functions must be stateless, that means: Calling the same function with exactly the same parameters must always result in the same computed value.

Author:

Thomas Morgner

Method Summary

Modifier and Type	Method and Description
TypeValuePair	evaluate(FormulaContext context, ParameterCallback parameters)
String	getCanonicalName()

Method Detail

getCanonicalName

String getCanonicalName()

evaluate

TypeValuePair evaluate(FormulaContext context,
                       ParameterCallback parameters)
                throws EvaluationException

Throws:

EvaluationException