net.sf.saxon.expr.flwor
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
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
SingularityPull
public SingularityPull()
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.
Copyright (c) 2004-2011 Saxonica Limited. All rights reserved.