com.saxonica.stream.feed
Class CountFeed

java.lang.Object
  com.saxonica.stream.feed.ItemFeed
      com.saxonica.stream.feed.CountFeed

All Implemented Interfaces:

Feed

public class CountFeed
extends ItemFeed

This class is used when counting items (other than nodes delivered by a Watch)

Constructor Summary

CountFeed(Expression expr, Feed result, Stack<XPathContext> contextStack)

Method Summary

void	append(Item item) Supply an item to the feed
void	close() Finish evaluating the expression.
void	open() Start evaluating the expression.

Methods inherited from class com.saxonica.stream.feed.ItemFeed

getContext, getContextStack, getExpression, getPipelineConfiguration, getResult, setPipelineConfiguration

Methods inherited from class java.lang.Object

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

Constructor Detail

CountFeed

public CountFeed(Expression expr,
                 Feed result,
                 Stack<XPathContext> contextStack)

Method Detail

open

public void open()
          throws XPathException

Description copied from class: ItemFeed

Start evaluating the expression. The default implementation does nothing.

Specified by:

open in interface Feed

Overrides:

open in class ItemFeed

Throws:

XPathException - if a dynamic error occurs

append

public void append(Item item)
            throws XPathException

Supply an item to the feed

Specified by:

append in interface Feed

Specified by:

append in class ItemFeed

Parameters:

item - the item being fed

Throws:

XPathException - to report any failure

close

public void close()
           throws XPathException

Description copied from class: ItemFeed

Finish evaluating the expression. The default implementation does nothing.

Specified by:

close in interface Feed

Overrides:

close in class ItemFeed

Throws:

XPathException - if a dynamic error occurs