Class Nilled

All Implemented Interfaces:
Serializable, SourceLocator, LocationProvider, SaxonLocator, CallableExpression, InstructionInfo, Locator

public class Nilled extends SystemFunction implements CallableExpression
This class supports the nilled() function
See Also:
  • Constructor Details

    • Nilled

      public Nilled()
  • Method Details

    • evaluateItem

      public Item evaluateItem(XPathContext c) throws XPathException
      Evaluate the function
      Overrides:
      evaluateItem in class Expression
      Parameters:
      c - The context in which the expression is to be evaluated
      Returns:
      the node or atomic value that results from evaluating the expression; or null to indicate that the result is an empty sequence
      Throws:
      XPathException - if any dynamic error occurs evaluating the expression
    • getNilledProperty

      public static BooleanValue getNilledProperty(NodeInfo node)
      Determine whether a node has the nilled property
      Parameters:
      node - the node in question (if null, the function returns null)
      Returns:
      the value of the nilled accessor. Returns null for any node other than an element node. For an element node, returns true if the element has been validated and has an xsi:nil attribute whose value is true.
    • isNilled

      public static boolean isNilled(NodeInfo node)
      Determine whether a node is nilled. Returns true if the value of the nilled property is true; false if the value is false or absent
    • call

      public SequenceIterator call(SequenceIterator[] arguments, XPathContext context) throws XPathException
      Evaluate the expression
      Specified by:
      call in interface CallableExpression
      Parameters:
      arguments - the values of the arguments, supplied as SequenceIterators
      context - the dynamic evaluation context
      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