Package com.saxonica.ee.stream.adjunct

Class FilterFunctionCallAdjunct

java.lang.Object

com.saxonica.ee.stream.adjunct.StreamingAdjunct

com.saxonica.ee.stream.adjunct.TransmissionAdjunct

com.saxonica.ee.stream.adjunct.FilterFunctionCallAdjunct

All Implemented Interfaces:

FeedMaker

public class FilterFunctionCallAdjunct
extends TransmissionAdjunct

Handle streaming for calls to user-defined functions with streamability="filter"

Constructor Summary

Constructors

Constructor	Description
FilterFunctionCallAdjunct()

Method Summary

Modifier and Type	Method	Description
PostureAndSweep	computeStreamability(ContextItemStaticInfoEE contextInfo, List<String> reasons)	Compute the posture and sweep of this expression as defined in the W3C streamability specifications.
ItemFeed	makeItemFeed(WatchManager watchManager, ItemFeed resultFeed, XPathContext context)

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, toStreamingPattern

Methods inherited from class java.lang.Object

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

Constructor Details

FilterFunctionCallAdjunct

public FilterFunctionCallAdjunct()

Method Details

computeStreamability

public PostureAndSweep computeStreamability(ContextItemStaticInfoEE contextInfo,
 List<String> reasons)

Description copied from class: StreamingAdjunct

Compute the posture and sweep of this expression as defined in the W3C streamability specifications. This must be implemented in all subclasses that don't use the general streamability rules. The implementation should have the side-effect of computing the streamability of all subexpressions, recursively.

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; the contents are human-readable messages explaining why the expression is not streamable.

Returns:

the posture and sweep of the expression

makeItemFeed

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

Throws:

XPathException