Package com.saxonica.ee.stream.adjunct
Class ForEachGroupAdjunct
- java.lang.Object
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- com.saxonica.ee.stream.adjunct.StreamingAdjunct
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- com.saxonica.ee.stream.adjunct.TransmissionAdjunct
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- com.saxonica.ee.stream.adjunct.ForEachAdjunct
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- com.saxonica.ee.stream.adjunct.ForEachGroupAdjunct
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- All Implemented Interfaces:
FeedMaker
public class ForEachGroupAdjunct extends ForEachAdjunct
Compile an xsl:for-each-group instruction to streaming code.
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Constructor Summary
Constructors Constructor Description ForEachGroupAdjunct()
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description PostureAndSweepcomputeStreamability(ContextItemStaticInfoEE contextInfo, java.util.List<java.lang.String> reasons)Get the "sweep" of this expression as defined in the W3C streamability specifications.WatchMakergetWatchMaker(boolean forGrouping)Get a WatchMaker, a factory class that creates a Watch to evaluate this expression in streaming mode.static GroupBoundaryTestermakeBoundaryTester(ForEachGroup instruction, XPathContext populationContext)ItemFeedmakeItemFeed(WatchManager watchManager, ItemFeed out, XPathContext context)-
Methods inherited from class com.saxonica.ee.stream.adjunct.ForEachAdjunct
getActionInversion, getStreamability, setExpression, toStreamingPattern
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Methods inherited from class com.saxonica.ee.stream.adjunct.TransmissionAdjunct
makeTransmissionFlow
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Methods inherited from class com.saxonica.ee.stream.adjunct.StreamingAdjunct
findConsumingArg, getConfiguration, getDefaultFeedMaker, getExpression, getFeedMaker, makeStreamingAdjunct, setConfiguration
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Method Detail
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computeStreamability
public PostureAndSweep computeStreamability(ContextItemStaticInfoEE contextInfo, java.util.List<java.lang.String> reasons)
Get the "sweep" 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:
computeStreamabilityin classForEachAdjunct- Parameters:
contextInfo- whatever is known statically about the context itemreasons- return parameter to hold reasons for non-streamability @return the posture and sweep- Returns:
- the posture and sweep of the expression
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getWatchMaker
public WatchMaker getWatchMaker(boolean forGrouping) throws XPathException
Description copied from class:StreamingAdjunctGet 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:
getWatchMakerin classForEachAdjunct- 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
- Specified by:
makeItemFeedin interfaceFeedMaker- Overrides:
makeItemFeedin classForEachAdjunct- Throws:
XPathException
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makeBoundaryTester
public static GroupBoundaryTester makeBoundaryTester(ForEachGroup instruction, XPathContext populationContext)
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