com.saxonica.stream.feed
Class DistinctValuesFeed

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

All Implemented Interfaces:

Feed

public class DistinctValuesFeed
extends ItemFeed

This class is used when a streaming template requests evaluation of the distinct-values() of the nodes selected by a path expression

Constructor Summary

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

Method Summary

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

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

close, 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

DistinctValuesFeed

public DistinctValuesFeed(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