com.saxonica.expr.flwor
Class WindowClausePush

java.lang.Object
  net.sf.saxon.expr.flwor.TuplePush
      com.saxonica.expr.flwor.WindowClausePush

public class WindowClausePush
extends TuplePush

Implement a sliding or tumbling window clause of a FLWOR expression in tuple-push mode. The entire window processing is activated once for each input tuple, and it generates one output tuple for each identified window.

Constructor Summary

WindowClausePush(TuplePush destination, WindowClause windowClause)

Method Summary

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 java.lang.Object

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

Constructor Detail

WindowClausePush

public WindowClausePush(TuplePush destination,
                        WindowClause windowClause)

Method Detail

processTuple

public void processTuple(XPathContext context)
                  throws XPathException

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

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

Overrides:

close in class TuplePush

Throws:

XPathException - if a dynamic error occurs