Class CurrentGroup

All Implemented Interfaces:
Serializable, SourceLocator, Container, Expression, XSLTFunction, InstructionInfoProvider

public class CurrentGroup extends SystemFunction implements XSLTFunction
Implements the XSLT functions current-group() and current-grouping-key()
See Also:
  • Field Details

  • Constructor Details

    • CurrentGroup

      public CurrentGroup()
  • Method Details

    • preEvaluate

      public Expression preEvaluate(StaticContext env)
      preEvaluate: this method suppresses compile-time evaluation by doing nothing (because the value of the expression depends on the runtime context)
      Overrides:
      preEvaluate in class FunctionCall
    • evaluateItem

      public Item evaluateItem(XPathContext c) throws XPathException
      Evaluate the expression
      Specified by:
      evaluateItem in interface Expression
      Overrides:
      evaluateItem in class ComputedExpression
      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
    • iterate

      public SequenceIterator iterate(XPathContext c) throws XPathException
      Return an iteration over the result sequence
      Specified by:
      iterate in interface Expression
      Overrides:
      iterate in class ComputedExpression
      Parameters:
      c - supplies the context for evaluation
      Returns:
      a SequenceIterator that can be used to iterate over the result of the expression
      Throws:
      XPathException - if any dynamic error occurs evaluating the expression
    • getIntrinsicDependencies

      public int getIntrinsicDependencies()
      Determine the dependencies
      Overrides:
      getIntrinsicDependencies in class ComputedExpression
      Returns:
      a set of bit-significant flags identifying the "intrinsic" dependencies. The flags are documented in class net.sf.saxon.value.StaticProperty