Package com.saxonica.ee.stream.adjunct

Class InsertBeforeStreamer

java.lang.Object

com.saxonica.ee.stream.adjunct.StreamingAdjunct

com.saxonica.ee.stream.adjunct.TransmissionAdjunct

com.saxonica.ee.stream.adjunct.InsertBeforeStreamer

All Implemented Interfaces:

FeedMaker

public class InsertBeforeStreamer
extends TransmissionAdjunct
implements FeedMaker

Implement streaming of insert-before instruction. This is complicated by the fact that we need separate implementations depending on which argument is being streamed.

Constructor Summary

Constructors

Constructor	Description
InsertBeforeStreamer()

Method Summary

Modifier and Type	Method	Description
WatchMaker	getWatchMaker(boolean forGrouping)	Get a WatchMaker, a factory class that creates a Watch to evaluate this expression in streaming mode.
ItemFeed	makeItemFeed(WatchManager watchManager, ItemFeed out, XPathContext context)

Methods inherited from class com.saxonica.ee.stream.adjunct.TransmissionAdjunct

makeTransmissionFlow

Methods inherited from class com.saxonica.ee.stream.adjunct.StreamingAdjunct

computeStreamability, emptyAdjunctMap, findConsumingArg, genId, getConfiguration, getDefaultFeedMaker, getExpression, getFeedMaker, makeStreamingAdjunct, setConfiguration, setExpression, toStreamingPattern

Methods inherited from class java.lang.Object

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

Constructor Details

InsertBeforeStreamer

public InsertBeforeStreamer()

Method Details

getWatchMaker

public WatchMaker getWatchMaker(boolean forGrouping)
                         throws XPathException

Get a WatchMaker, a factory class that creates a Watch to evaluate this expression in streaming mode. This method will only be called if the getImplementationMethod() method of the expression includes the value Expression.WATCH_METHOD

Overrides:

getWatchMaker in class TransmissionAdjunct

Parameters:

forGrouping - true if the selected items are being grouped

Returns:

a Watchmaker to evaluate the expression, or null if it is not streamable with respect to the specificed argument.

Throws:

XPathException - in the event of a failure

makeItemFeed

public ItemFeed makeItemFeed(WatchManager watchManager,
 ItemFeed out,
 XPathContext context)
                      throws XPathException

Specified by:

makeItemFeed in interface FeedMaker

Throws:

XPathException