Package com.saxonica.ee.stream.feed
Class GeneralComparisonMinimaxFeed
java.lang.Object
net.sf.saxon.event.Outputter
net.sf.saxon.event.ProxyOutputter
com.saxonica.ee.stream.feed.ItemFeed
com.saxonica.ee.stream.feed.AtomicItemFeed
com.saxonica.ee.stream.feed.GeneralComparisonMinimaxFeed
This class is used when a streaming template requests a general comparison with one operand
being pushed from the streamed input document, and the other being evaluated in pull mode.
It is used for the operators lt, le, gt, ge.
The unstreamed operand is evaluated when the first streamed item is encountered. At this point we build a list of all the values from the unstreamed operand, unconverted, plus the min and max of all numeric values including all untyped values that are castable to numeric.
Each streamed input value is then compared against this data. If the streamed input value is numeric, or is untyped and castable to numeric, then it is compared with the min and max numeric values. Otherwise, it is compared against the complete list of unconverted values.
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Field Summary
Fields inherited from class net.sf.saxon.event.Outputter
pipelineConfiguration, systemId
Fields inherited from interface javax.xml.transform.Result
PI_DISABLE_OUTPUT_ESCAPING, PI_ENABLE_OUTPUT_ESCAPING
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Constructor Summary
ConstructorsConstructorDescriptionGeneralComparisonMinimaxFeed
(WatchManager watchManager, Expression expr, int pushedArg, ItemFeed result, XPathContext context) -
Method Summary
Modifier and TypeMethodDescriptionvoid
Supply an item to the feedvoid
close()
Finish evaluating the expression.void
open
(Terminator terminator) Start evaluating the expression.Methods inherited from class com.saxonica.ee.stream.feed.AtomicItemFeed
attribute, characters, comment, endDocument, endElement, namespace, processingInstruction, setUnparsedEntity, startContent, startDocument, startElement, startElement
Methods inherited from class com.saxonica.ee.stream.feed.ItemFeed
append, dynamicError, endSelectedParentNode, getContext, getExpression, getResultFeed, getTerminator, hasFailed, processItems, setExpression, setHasFailed, setTerminator, startSelectedParentNode
Methods inherited from class net.sf.saxon.event.ProxyOutputter
getNextOutputter, open, usesTypeAnnotations
Methods inherited from class net.sf.saxon.event.Outputter
getConfiguration, getPipelineConfiguration, getStringReceiver, getSystemId, namespaces, setPipelineConfiguration, setSystemId, spreadStartElement
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
Methods inherited from interface net.sf.saxon.event.Receiver
handlesAppend
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Constructor Details
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GeneralComparisonMinimaxFeed
public GeneralComparisonMinimaxFeed(WatchManager watchManager, Expression expr, int pushedArg, ItemFeed result, XPathContext context)
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Method Details
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open
Description copied from class:ItemFeed
Start evaluating the expression. The default implementation does nothing.- Overrides:
open
in classItemFeed
- Parameters:
terminator
- used to achieve early exit- Throws:
XPathException
- if a dynamic error occurs
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append
Supply an item to the feed- Specified by:
append
in interfaceReceiver
- Specified by:
append
in classItemFeed
- Parameters:
item
- the item being fed (in this case, an item in the "pushed" operand sequence that is being compared- Throws:
XPathException
- to report any failure
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close
Description copied from class:ItemFeed
Finish evaluating the expression.- Specified by:
close
in interfaceReceiver
- Overrides:
close
in classItemFeed
- Throws:
XPathException
- if a dynamic error occurs
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