Package com.saxonica.ee.stream.feed
Class ItemMappingFeed
- 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.GroundedItemFeed
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- com.saxonica.ee.stream.feed.ItemMappingFeed
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- All Implemented Interfaces:
javax.xml.transform.Result,Receiver
public class ItemMappingFeed extends GroundedItemFeed
A Feed which applies an ItemMappingFunction to each supplied item. This produces zero or one output items for each input item. The ItemMappingFunction must be one that is capable of handling streamed nodes (otherwise an UnsupportedOperationException is likely).
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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 ItemMappingFeed(Expression expr, ItemFeed result, XPathContext context, ItemMappingFunction function)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description voidappend(Item item)Supply an item to the feedvoidclose()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.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.GroundedItemFeed
attribute, characters, comment, endDocument, endElement, namespace, processingInstruction, setUnparsedEntity, startContent, startDocument, startElement, startElement
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Methods inherited from class com.saxonica.ee.stream.feed.ItemFeed
append, dynamicError, getContext, getExpression, getResult, getTerminator, hasFailed, open, processItems, setExpression, setHasFailed, setTerminator
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Methods inherited from class net.sf.saxon.event.ProxyOutputter
getNextOutputter, open, setLocation, 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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ItemMappingFeed
public ItemMappingFeed(Expression expr, ItemFeed result, XPathContext context, ItemMappingFunction function)
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Method Detail
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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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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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append
public void append(Item item) throws XPathException
Supply an item to the feed- Specified by:
appendin interfaceReceiver- Specified by:
appendin classItemFeed- Parameters:
item- the item being fed- Throws:
XPathException- to report any failure
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close
public void close() throws XPathExceptionFinish evaluating the expression. The default implementation does nothing.- Specified by:
closein interfaceReceiver- Overrides:
closein classItemFeed- Throws:
XPathException- if a dynamic error occurs
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