Class SingularityPull

java.lang.Object
net.sf.saxon.expr.flwor.TuplePull
net.sf.saxon.expr.flwor.SingularityPull

public class SingularityPull extends TuplePull
The "singularity" tuple stream delivers a single empty tuple. It is the base tuple stream for the outermost for/let clause in a FLWOR expression
  • Constructor Details

    • SingularityPull

      public SingularityPull()
  • Method Details

    • nextTuple

      public boolean nextTuple(XPathContext context)
      Move on to the next tuple. Before returning, this method must set all the variables corresponding to the "returned" tuple in the local stack frame associated with the context object
      Specified by:
      nextTuple in class TuplePull
      Parameters:
      context - the dynamic evaluation context
      Returns:
      true if another tuple has been generated; false if the tuple stream is exhausted. If the method returns false, the values of the local variables corresponding to this tuple stream are undefined.