Package net.sf.saxon.functions.hof

Class FunctionArity

java.lang.Object
net.sf.saxon.functions.AbstractFunction
net.sf.saxon.functions.SystemFunction
net.sf.saxon.functions.hof.FunctionArity
All Implemented Interfaces:
Callable, FunctionItem, GroundedValue, Item, Sequence
public class FunctionArity extends SystemFunction
This class implements the function function-arity(), which is a standard function in XPath 3.0

  • Constructor Details

    • FunctionArity

      public FunctionArity()

  • Method Details

    • getIntegerBounds

      public IntegerValue[] getIntegerBounds()
      For an expression that returns an integer or a sequence of integers, get a lower and upper bound on the values of the integers that may be returned, from static analysis. The default implementation returns null, meaning "unknown" or "not applicable". Other implementations return an array of two IntegerValue objects, representing the lower and upper bounds respectively. The values UNBOUNDED_LOWER and UNBOUNDED_UPPER are used by convention to indicate that the value may be arbitrarily large. The values MAX_STRING_LENGTH and MAX_SEQUENCE_LENGTH are used to indicate values limited by the size of a string or the size of a sequence.
      Overrides:
      getIntegerBounds in class SystemFunction
      Returns:
      the lower and upper bounds of integer values in the result, or null to indicate unknown or not applicable.

    • call

      public IntegerValue call(XPathContext context, Sequence[] arguments) throws XPathException
      Evaluate the expression
      Parameters:
      context - the dynamic evaluation context
      arguments - the values of the arguments, supplied as SequenceIterators
      Returns:
      the result of the evaluation, in the form of a SequenceIterator
      Throws:
      XPathException - if a dynamic error occurs during the evaluation of the expression