Package net.sf.saxon.expr.flwor

Class WhileClausePush

java.lang.Object

net.sf.saxon.expr.flwor.TuplePush

net.sf.saxon.expr.flwor.WhileClausePush

public class WhileClausePush
extends TuplePush

This class represents the tuple stream delivered as the output of a while clause in a FLWOR expression: that is, it supplies all the tuples in its input stream that satisfy a specified predicate until it finds one that doesn't. It does not change the values of any variables in the tuple stream.

Constructor Summary

Constructors

Constructor	Description
WhileClausePush(Outputter outputter, TuplePush destination, BooleanEvaluator predicate)

Method Summary

Modifier and Type	Method	Description
void	close()	Close the tuple stream, indicating that no more tuples will be supplied
void	processTuple(XPathContext context)	Notify the availability of the next tuple.

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

getOutputter

Methods inherited from class java.lang.Object

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

Constructor Details

WhileClausePush

public WhileClausePush(Outputter outputter,
 TuplePush destination,
 BooleanEvaluator predicate)

Method Details

processTuple

public void processTuple(XPathContext context)
                  throws XPathException

Description copied from class: TuplePush

Notify the availability of the next tuple. Before calling this method, the supplier of the tuples must set all the variables corresponding to the supplied tuple in the local stack frame associated with the context object

Specified by:

processTuple in class TuplePush

Parameters:

context - the dynamic evaluation context

Throws:

XPathException - if a dynamic error occurs

close

public void close()
           throws XPathException

Description copied from class: TuplePush

Close the tuple stream, indicating that no more tuples will be supplied

Overrides:

close in class TuplePush

Throws:

XPathException - if a dynamic error occurs