Package com.saxonica.ee.stream.adjunct
Class DeepDescentFunctionCallAdjunct
java.lang.Object
com.saxonica.ee.stream.adjunct.StreamingAdjunct
com.saxonica.ee.stream.adjunct.TransmissionAdjunct
com.saxonica.ee.stream.adjunct.DeepDescentFunctionCallAdjunct
- All Implemented Interfaces:
FeedMaker
Handle streaming for calls to user-defined functions with streamability="absorbing"
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptioncomputeStreamability
(ContextItemStaticInfoEE contextInfo, List<String> reasons) Compute the posture and sweep of this expression as defined in the W3C streamability specifications.getWatchMaker
(boolean forGrouping) Get a WatchMaker, a factory class that creates a Watch to evaluate this expression in streaming mode.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
emptyAdjunctMap, findConsumingArg, genId, getConfiguration, getDefaultFeedMaker, getExpression, getFeedMaker, makeStreamingAdjunct, setConfiguration, setExpression, toStreamingPattern
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Constructor Details
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DeepDescentFunctionCallAdjunct
public DeepDescentFunctionCallAdjunct()
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Method Details
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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 classStreamingAdjunct
- Parameters:
contextInfo
- Information about the context item type and posturereasons
- 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
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getWatchMaker
Description copied from class:StreamingAdjunct
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 valueExpression.WATCH_METHOD
- Overrides:
getWatchMaker
in classTransmissionAdjunct
- 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
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makeItemFeed
public ItemFeed makeItemFeed(WatchManager watchManager, ItemFeed out, XPathContext context) throws XPathException - Throws:
XPathException
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