Package net.sf.saxon.expr.elab

Interface PushEvaluator

All Known Implementing Classes:
MergeInstrAdjunct.MergePusher
Functional Interface:
This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
@FunctionalInterface public interface PushEvaluator

  • Method Summary

    Modifier and Type
    Method
    Description
    TailCall
    processLeavingTail(Outputter out, XPathContext context)
    Evaluate a construct in push mode, sending the value of the construct to a supplied outputter

  • Method Details

    • processLeavingTail

      TailCall processLeavingTail(Outputter out, XPathContext context) throws XPathException
      Evaluate a construct in push mode, sending the value of the construct to a supplied outputter
      Parameters:
      out - the outputter to which the result should be sent
      context - the evaluation context
      Returns:
      either a TailCall or null. A TailCall represents unfinished work that must be completed by the caller. Specifically, if a non-null value is returned, the caller must either complete the evaluation by evaluating tail calls until null is returned (which can be conveniently achieved by calling Expression.dispatchTailCall(TailCall), or it must return the TailCall to its own caller
      Throws:
      XPathException - if a dynamic error occurs during the evaluation.