Package com.saxonica.ee.stream.feed
Class NoOpenOrCloseFeed
- java.lang.Object
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- net.sf.saxon.event.Outputter
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- net.sf.saxon.event.ProxyOutputter
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- com.saxonica.ee.stream.feed.ItemFeed
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- com.saxonica.ee.stream.feed.NoOpenOrCloseFeed
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- All Implemented Interfaces:
javax.xml.transform.Result,Receiver
public class NoOpenOrCloseFeed extends ItemFeed
This feed is used for the inner loop of a for-each, where the results of multiple iterations need to be concatenated into a single sequence. This means we don't want a call on open/close around each inner iteration. So this feed suppresses these calls, preventing them cascading up the pipeline.
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Field Summary
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Fields inherited from class net.sf.saxon.event.Outputter
pipelineConfiguration, systemId
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Constructor Summary
Constructors Constructor Description NoOpenOrCloseFeed(ItemFeed parentFeed, XPathContext context)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description voidappend(Item item)Supply one item towards the streamed input of the expressionvoidclose()Finish evaluating the expression.voidendSelectedParentNode(Location locationId)Signal that the endElement event has occurred for the element whose startElement event caused the Watch to be activated.voidopen(Terminator terminator)Start evaluating the expression.ReceiverstartSelectedParentNode(FleetingParentNode node, Location locationId)Signal that an element or document node has been found that matches the selection that this Watch is looking for.-
Methods inherited from class com.saxonica.ee.stream.feed.ItemFeed
append, dynamicError, getContext, getExpression, getResult, getTerminator, hasFailed, processItems, setExpression, setHasFailed, setTerminator
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Methods inherited from class net.sf.saxon.event.ProxyOutputter
attribute, characters, comment, endDocument, endElement, getNextOutputter, namespace, open, processingInstruction, setLocation, setUnparsedEntity, startContent, startDocument, startElement, startElement, usesTypeAnnotations
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Methods inherited from class net.sf.saxon.event.Outputter
getConfiguration, getPipelineConfiguration, getStringReceiver, getSystemId, namespaces, setPipelineConfiguration, setSystemId
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Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface net.sf.saxon.event.Receiver
handlesAppend
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Constructor Detail
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NoOpenOrCloseFeed
public NoOpenOrCloseFeed(ItemFeed parentFeed, XPathContext context)
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Method Detail
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open
public void open(Terminator terminator)
Description copied from class:ItemFeedStart evaluating the expression. The default implementation does nothing.
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startSelectedParentNode
public Receiver startSelectedParentNode(FleetingParentNode node, Location locationId) throws XPathException
Description copied from class:ItemFeedSignal that an element or document node has been found that matches the selection that this Watch is looking for. This method is called by the WatchManager while processing the startElement or startDocument event that matches the selection.- Overrides:
startSelectedParentNodein classItemFeed- Parameters:
node- the element or document node whose start event has been matchedlocationId- the location associated with the element or document node (may be the location of the instruction that created it)- Returns:
- a Receiver to be notified of all events starting with the startElement/startDocument event for the matched element, and ending with the endElement event for that element; or null if this feature is not required.
- Throws:
XPathException- May be raised if a dynamic error occurs
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append
public void append(Item item) throws XPathException
Description copied from class:ItemFeedSupply one item towards the streamed input of the expression- Specified by:
appendin interfaceReceiver- Specified by:
appendin classItemFeed- Parameters:
item- the item to be supplied- Throws:
XPathException- if the operation fails
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endSelectedParentNode
public void endSelectedParentNode(Location locationId) throws XPathException
Description copied from class:ItemFeedSignal that the endElement event has occurred for the element whose startElement event caused the Watch to be activated.- Overrides:
endSelectedParentNodein classItemFeed- Parameters:
locationId- the location of the element- Throws:
XPathException- May be raised if a constraint implemented by this Watch is violated
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