com.saxonica.stream.feed
Class BlockFeed

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

All Implemented Interfaces:

Feed

public class BlockFeed
extends ItemFeed

This class is used when a streaming template requests evaluation of a block (typically (A, B, C)) where one of the child expressions takes input from a watch on the streamed document. The relevant input expression is identified by a call on setStreamedArgument().

Constructor Summary

BlockFeed(Expression block, Feed result, Stack<XPathContext> contextStack, int arg)

Method Summary

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

BlockFeed

public BlockFeed(Expression block,
                 Feed result,
                 Stack<XPathContext> contextStack,
                 int arg)
          throws XPathException

Throws:

XPathException

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

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