com.saxonica.ee.stream.adjunct

Class ItemCheckerAdjunct

java.lang.Object

com.saxonica.ee.stream.adjunct.StreamingAdjunct

com.saxonica.ee.stream.adjunct.TransmissionAdjunct

com.saxonica.ee.stream.adjunct.ItemCheckerAdjunct

All Implemented Interfaces:

FeedMaker

public class ItemCheckerAdjunct
extends TransmissionAdjunct
implements FeedMaker

Streaming code for an item checker

Constructor Summary

Constructors

Constructor and Description
ItemCheckerAdjunct()

Method Summary

Methods

Modifier and Type	Method and Description
PostureAndSweep	computeStreamability(boolean allowExtensions, ContextItemStaticInfo contextInfo, List<String> reasons) Get the sweep and posture of this expression as defined in the W3C streamability specifications.
Feed	makeItemFeed(WatchManager watchManager, Feed out, XPathContext context)

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

getWatchMaker, makeTransmissionFlow

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

getConfiguration, getDefaultFeedMaker, getExpression, getFeedMaker, setConfiguration, setExpression, toStreamingPattern

Methods inherited from class java.lang.Object

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

Constructor Detail

ItemCheckerAdjunct

public ItemCheckerAdjunct()

Method Detail

computeStreamability

public PostureAndSweep computeStreamability(boolean allowExtensions,
                                   ContextItemStaticInfo contextInfo,
                                   List<String> reasons)

Get the sweep and posture of this expression as defined in the W3C streamability specifications. This provides an assessment of stylesheet code against the W3C criteria for guaranteed streamability, and is implemented to allow these criteria to be tested. It is not the case that all expression that emerge as streamable from this analysis are currently capable of being streamed by Saxon

Overrides:

computeStreamability in class StreamingAdjunct

Parameters:

allowExtensions - if false, the definition of "guaranteed streamability" in the W3C specification is used. If true, Saxon extensions are permitted, which make some

contextInfo - information about the context item type and posture

reasons - the caller may supply a list, in which case the implementation may add to this

Returns:

the posture and sweep of the expression

makeItemFeed

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

Specified by:

makeItemFeed in interface FeedMaker

Throws:

XPathException