Package com.saxonica.ee.stream.feed
Class SnapshotFeed
- java.lang.Object
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- All Implemented Interfaces:
javax.xml.transform.Result,Receiver
public class SnapshotFeed extends AbsorptionFeed
This class provides streamed implementation of the snapshot() function
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Nested Class Summary
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Nested classes/interfaces inherited from class com.saxonica.ee.stream.feed.AbsorptionFeed
AbsorptionFeed.PendingItem
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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 SnapshotFeed(WatchManager watchManager, ItemFeed result, XPathContext context)
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Method Summary
All Methods Static Methods Instance Methods Concrete Methods Modifier and Type Method Description static TriggergetWatch(ItemFeed result, Pattern selection, WatchManager wm, XPathContext context)Create a Watch whose effect is to create snapshots of the selected (streamed) nodes and pass them to the supplied feedprotected AbsorptionFeed.PendingItemmakePendingItem(int sequenceNr, FleetingParentNode node)Create a pending item (appropriate to the subclass) containing the data needed to compute the result value for one node in the streamed input sequenceprotected SequenceprocessGroundedItem(Item item)Process a grounded item in the input sequence: either a streamed leaf node such as an attribute or text node, or an atomic value, or a non-streamed element or document node injected into the sequence for example by use of the comma operator.-
Methods inherited from class com.saxonica.ee.stream.feed.AbsorptionFeed
append, endSelectedParentNode, setHasFailed, startSelectedParentNode
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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, close, dynamicError, getContext, getExpression, getResult, getTerminator, hasFailed, open, processItems, setExpression, 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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SnapshotFeed
public SnapshotFeed(WatchManager watchManager, ItemFeed result, XPathContext context)
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Method Detail
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getWatch
public static Trigger getWatch(ItemFeed result, Pattern selection, WatchManager wm, XPathContext context)
Create a Watch whose effect is to create snapshots of the selected (streamed) nodes and pass them to the supplied feed- Parameters:
result- The feed to which the snapshot nodes should be suppliedselection- defines the nodes to be selectedwm- The WatchManager that will notify the selected nodescontext- the XPath evaluation context- Returns:
- the new Watch
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makePendingItem
protected AbsorptionFeed.PendingItem makePendingItem(int sequenceNr, FleetingParentNode node) throws XPathException
Description copied from class:AbsorptionFeedCreate a pending item (appropriate to the subclass) containing the data needed to compute the result value for one node in the streamed input sequence- Specified by:
makePendingItemin classAbsorptionFeed- Parameters:
sequenceNr- the sequence number of this node within a set of nested nodesnode- the streamed input node- Returns:
- the data needed to process this node
- Throws:
XPathException- if a dynamic error is detected at this stage
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processGroundedItem
protected Sequence processGroundedItem(Item item)
Description copied from class:AbsorptionFeedProcess a grounded item in the input sequence: either a streamed leaf node such as an attribute or text node, or an atomic value, or a non-streamed element or document node injected into the sequence for example by use of the comma operator.- Specified by:
processGroundedItemin classAbsorptionFeed- Parameters:
item- the grounded item- Returns:
- the result of processing the grounded item
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