Package org.jaxen
Interface Function
-
- All Known Implementing Classes:
BooleanFunction,CeilingFunction,ConcatFunction,ContainsFunction,CountFunction,DocumentFunction,EndsWithFunction,EvaluateFunction,FalseFunction,FloorFunction,IdFunction,LangFunction,LastFunction,LocaleFunctionSupport,LocalNameFunction,LowerFunction,NameFunction,NamespaceUriFunction,NormalizeSpaceFunction,NotFunction,NumberFunction,PositionFunction,RoundFunction,StartsWithFunction,StringFunction,StringLengthFunction,SubstringAfterFunction,SubstringBeforeFunction,SubstringFunction,SumFunction,TranslateFunction,TrueFunction,UpperFunction
public interface FunctionInterface for the extensible function framework.NOTE: This class is not typically used directly, but is exposed for writers of extended XPath packages.
Implementations of
Functionare functors which are used to evaluate a function-call within an XPath expression.- Author:
- bob mcwhirter
- See Also:
FunctionContext
-
-
Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description java.lang.Objectcall(Context context, java.util.List args)Evaluate this function.
-
-
-
Method Detail
-
call
java.lang.Object call(Context context, java.util.List args) throws FunctionCallException
Evaluate this function.- Parameters:
context- the context at the point in the expression when the function is calledargs- arguments provided to the function- Returns:
- the result of evaluating the function; a
List(node-set),Double,Boolean, orString - Throws:
FunctionCallException- if an XPath error occurs during evaluation; for instance, if the number or type of the arguments is incorrect
-
-