Package com.saxonica.ee.stream.adjunct
Class SnapshotFnStreamer
java.lang.Object
com.saxonica.ee.stream.adjunct.StreamingAdjunct
com.saxonica.ee.stream.adjunct.ComposingAdjunct
com.saxonica.ee.stream.adjunct.SnapshotFnStreamer
- All Implemented Interfaces:
FeedMaker
Generate streaming code for the snapshot() function
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptiongetWatchMaker
(boolean forGrouping) Get a WatchMaker, a factory class that creates a Watch to evaluate this expression in streaming mode.makeComposingAction
(WatchManager watchManager, ItemFeed out, XPathContext context) Method that must be implemented in subclasses to supply the feed to which the composed items are sentmakeItemFeed
(WatchManager watchManager, ItemFeed out, XPathContext context) Methods inherited from class com.saxonica.ee.stream.adjunct.StreamingAdjunct
computeStreamability, emptyAdjunctMap, findConsumingArg, genId, getConfiguration, getDefaultFeedMaker, getExpression, getFeedMaker, makeStreamingAdjunct, setConfiguration, setExpression, toStreamingPattern
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Constructor Details
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SnapshotFnStreamer
public SnapshotFnStreamer()
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Method Details
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makeComposingAction
Description copied from class:ComposingAdjunct
Method that must be implemented in subclasses to supply the feed to which the composed items are sent- Specified by:
makeComposingAction
in classComposingAdjunct
- Parameters:
watchManager
- the watch managerout
- the destination of composed itemscontext
- XPath evaluation context- Returns:
- a the relevant ItemFeed
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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 classComposingAdjunct
- 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.
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makeItemFeed
public ItemFeed makeItemFeed(WatchManager watchManager, ItemFeed out, XPathContext context) throws XPathException - Specified by:
makeItemFeed
in interfaceFeedMaker
- Throws:
XPathException
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