net.sf.saxon.expr.flwor

Class CountClausePull

java.lang.Object

net.sf.saxon.expr.flwor.TuplePull

net.sf.saxon.expr.flwor.CountClausePull

public class CountClausePull
extends TuplePull

A tuple stream that implements a "count" clause in an XQuery 3.0 FLWOR expression

Constructor Summary

Constructors

Constructor and Description
CountClausePull(TuplePull base, CountClause countClause)

Method Summary

Modifier and Type	Method and Description
boolean	nextTuple(XPathContext context) Move on to the next tuple.

Methods inherited from class net.sf.saxon.expr.flwor.TuplePull

close

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

CountClausePull

public CountClausePull(TuplePull base,
                       CountClause countClause)

Method Detail

nextTuple

public boolean nextTuple(XPathContext context)
                  throws XPathException

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.

Throws:

XPathException