Package com.saxonica.ee.stream.adjunct
Class LiteralAdjunct
java.lang.Object
com.saxonica.ee.stream.adjunct.StreamingAdjunct
com.saxonica.ee.stream.adjunct.LiteralAdjunct
- All Implemented Interfaces:
FeedMaker
Streamed evaluation of a literal (not difficult!)
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Nested Class Summary
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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.makeItemFeed
(WatchManager watchManager, ItemFeed out, XPathContext context) 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.StreamingAdjunct
emptyAdjunctMap, findConsumingArg, genId, getConfiguration, getDefaultFeedMaker, getExpression, getFeedMaker, getWatchMaker, makeStreamingAdjunct, setConfiguration, setExpression
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Constructor Details
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LiteralAdjunct
public LiteralAdjunct()
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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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toStreamingPattern
Convert this expression to a streaming pattern (a pattern used internally to match nodes during push processing of an event stream)- Overrides:
toStreamingPattern
in classStreamingAdjunct
- Parameters:
config
- the Saxon configuration- Returns:
- the equivalent pattern if conversion succeeds; otherwise null
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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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