com.saxonica.expr.flwor
Class WindowClause.Window

java.lang.Object
  com.saxonica.expr.flwor.WindowClause.Window

Enclosing class:

WindowClause

protected static class WindowClause.Window
extends Object

Information about a window: the items making up the window, as well as the variables relating to the start and end of the window, and the status of the winoow in relation to the processing of the current input sequence.

Field Summary

List<Item>	contents
Item	endItem
Item	endNextItem
int	endPosition
Item	endPreviousItem
boolean	isDespatched
Item	startItem
Item	startNextItem
int	startPosition
Item	startPreviousItem

Constructor Summary

protected

WindowClause.Window()

Method Summary

boolean	isDespatched() Ask whether the tuple corresponding to this window has been despatched to the output tuple stream.
boolean	isFinished() Ask whether we have found the last item in the window

Methods inherited from class java.lang.Object

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

Field Detail

startItem

public Item startItem

startPosition

public int startPosition

startPreviousItem

public Item startPreviousItem

startNextItem

public Item startNextItem

endItem

public Item endItem

endPosition

public int endPosition

endPreviousItem

public Item endPreviousItem

endNextItem

public Item endNextItem

contents

public List<Item> contents

isDespatched

public boolean isDespatched

Constructor Detail

WindowClause.Window

protected WindowClause.Window()

Method Detail

isFinished

public boolean isFinished()

Ask whether we have found the last item in the window

Returns:

true if we have found the last item; false if we are still looking for it.

isDespatched

public boolean isDespatched()

Ask whether the tuple corresponding to this window has been despatched to the output tuple stream. This does not always happen immediately the end item is determined, because tuples corresponding to the various windows must be despached in order of their start items.

Returns:

true if the tuple corresponding to this window has been despatched.