Package com.saxonica.ee.stream.adjunct

Class GNodeCoercerAdjunct

java.lang.Object

com.saxonica.ee.stream.adjunct.StreamingAdjunct

com.saxonica.ee.stream.adjunct.TransmissionAdjunct

com.saxonica.ee.stream.adjunct.GNodeCoercerAdjunct

All Implemented Interfaces:

FeedMaker

public class GNodeCoercerAdjunct
extends TransmissionAdjunct
implements FeedMaker

Streaming code for an item checker

Constructor Summary

Constructors

Constructor	Description
GNodeCoercerAdjunct()

Method Summary

Modifier and Type	Method	Description
PostureAndSweep	computeStreamability(ContextItemStaticInfoEE contextInfo, List<String> reasons)	Get the sweep and posture of this expression as defined in the W3C streamability specifications.
ItemFeed	makeItemFeed(WatchManager watchManager, ItemFeed out, XPathContext context)
Pattern	toStreamingPattern(Configuration config)	Convert this expression to a streaming pattern (a pattern used internally to match nodes during push processing of an event stream)

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

getWatchMaker, makeTransmissionFlow

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

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

Methods inherited from class java.lang.Object

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

Constructor Details

GNodeCoercerAdjunct

public GNodeCoercerAdjunct()

Method Details

computeStreamability

public PostureAndSweep computeStreamability(ContextItemStaticInfoEE 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:

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

Specified by:

makeItemFeed in interface FeedMaker

Throws:

XPathException

toStreamingPattern

public Pattern toStreamingPattern(Configuration config)

Convert this expression to a streaming pattern (a pattern used internally to match nodes during push processing of an event stream)

Overrides:

toStreamingPattern in class StreamingAdjunct

Parameters:

config - the Saxon configuration

Returns:

the equivalent pattern if conversion succeeds; otherwise null