Package com.saxonica.ee.stream.feed
Class SnapshotFeed
This class provides streamed implementation of the snapshot() function
-
Nested Class Summary
Nested classes/interfaces inherited from class com.saxonica.ee.stream.feed.AbsorptionFeed
AbsorptionFeed.PendingItem
-
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
-
Constructor Summary
ConstructorsConstructorDescriptionSnapshotFeed
(WatchManager watchManager, ItemFeed result, XPathContext context) -
Method Summary
Modifier and TypeMethodDescriptionstatic 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 feedprotected AbsorptionFeed.PendingItem
makePendingItem
(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 Sequence
processGroundedItem
(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
Methods inherited from class com.saxonica.ee.stream.feed.GroundedItemFeed
attribute, characters, comment, endDocument, endElement, namespace, processingInstruction, setUnparsedEntity, startContent, startDocument, startElement, startElement
Methods inherited from class com.saxonica.ee.stream.feed.ItemFeed
append, close, dynamicError, getContext, getExpression, getResultFeed, getTerminator, hasFailed, open, processItems, setExpression, setTerminator
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
-
Constructor Details
-
SnapshotFeed
-
-
Method Details
-
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
-
makePendingItem
protected AbsorptionFeed.PendingItem makePendingItem(int sequenceNr, FleetingParentNode node) throws XPathException Description copied from class:AbsorptionFeed
Create 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:
makePendingItem
in 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
-
processGroundedItem
Description copied from class:AbsorptionFeed
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.- Specified by:
processGroundedItem
in classAbsorptionFeed
- Parameters:
item
- the grounded item- Returns:
- the result of processing the grounded item
-