Package com.saxonica.ee.stream.adjunct
Class FilteringAdjunct
- 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.FilteringAdjunct
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- All Implemented Interfaces:
FeedMaker
- Direct Known Subclasses:
FilterExpressionAdjunct
,FilterFnStreamer
,FirstItemExpressionAdjunct
,OutermostStreamer
,RemoveStreamer
,SubscriptExpressionAdjunct
,SubsequenceStreamer
,TailExpressionAdjunct
public abstract class FilteringAdjunct extends TransmissionAdjunct implements FeedMaker
A subclass of StreamingAdjunct used for expressions that have a sequence-valued operand with usage transmission. Such expressions may appear as a filter for striding or crawling nodes, in which case they need to filter (or in some cases augment) the event stream rather than operating at the level of composed items.
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Constructor Summary
Constructors Constructor Description FilteringAdjunct()
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Method Summary
All Methods Instance Methods Abstract Methods Concrete Methods Modifier and Type Method Description abstract FilteringFeed.Filter
makeFilter(XPathContext context, ItemFeed out)
Make a filter for the event streamItemFeed
makeItemFeed(WatchManager watchManager, ItemFeed out, XPathContext context)
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Methods inherited from class com.saxonica.ee.stream.adjunct.TransmissionAdjunct
getWatchMaker, makeTransmissionFlow
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Methods inherited from class com.saxonica.ee.stream.adjunct.StreamingAdjunct
computeStreamability, findConsumingArg, getConfiguration, getDefaultFeedMaker, getExpression, getFeedMaker, makeStreamingAdjunct, setConfiguration, setExpression, toStreamingPattern
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Method Detail
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makeFilter
public abstract FilteringFeed.Filter makeFilter(XPathContext context, ItemFeed out) throws XPathException
Make a filter for the event stream- Parameters:
context
- the XPath dyamic contextout
- the destination for the filtered events- Returns:
- a filter that can be added to the event stream
- Throws:
XPathException
- if a dynamic evaluation error occurs
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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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