com.saxonica.stream.feed
Class SumFeed

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

All Implemented Interfaces:

Feed

public class SumFeed
extends ItemFeed

This class is used when a streaming template requests evaluation of the sum() of the nodes selected by a path expression, with the streamed input being the value of the first argument.

Constructor Summary

SumFeed(Expression sumExpr, Feed result, Stack<XPathContext> contextStack)

Method Summary

void	append(Item item) Supply an item to the feed
void	close() Signal the end of the sequence of items

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

getContext, getContextStack, getExpression, getPipelineConfiguration, getResult, open, setPipelineConfiguration

Methods inherited from class java.lang.Object

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

Constructor Detail

SumFeed

public SumFeed(Expression sumExpr,
               Feed result,
               Stack<XPathContext> contextStack)

Method Detail

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

Signal the end of the sequence of items

Specified by:

close in interface Feed

Overrides:

close in class ItemFeed

Throws:

XPathException - to report any failure