Package com.saxonica.ee.stream.watch

Class IterateAction

java.lang.Object

net.sf.saxon.event.Outputter

net.sf.saxon.event.ProxyOutputter

com.saxonica.ee.stream.feed.ItemFeed

com.saxonica.ee.stream.watch.ForEachAction

com.saxonica.ee.stream.watch.IterateAction

All Implemented Interfaces:

Result, Receiver

public class IterateAction
extends ForEachAction

This watch implements xsl:iterate in streaming mode. It watches for the nodes selected by the xsl:iterate instruction; when such a node is encountered, it locates the relevant (inverted) template, and activates it.

The watch is capable of handling a select expression that selects non-peer nodes (that is, one selected node that is a descendant of another). A top-level selected node is processed directly to the output receiver; a nested node is processed to create a temporary result tree, which is then appended to the output sequence when the processing of the outer selected node is complete.

Field Summary

Fields inherited from class com.saxonica.ee.stream.watch.ForEachAction

actionPuller, bodyContext, watchManager

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

Constructors

Constructor	Description
IterateAction(WatchManager watchManager, Expression expression, ItemFeed result, XPathContext context)

Method Summary

Modifier and Type	Method	Description
void	append(Item it)	Signal that a node (other than an element) that matches the selection has been found.
void	close()	Finish evaluating the expression.
void	endSelectedParentNode(Location locationId)	Signal that the endElement event has occurred for the element whose startElement event caused the Watch to be activated.
void	open(Terminator terminator)	Start evaluating the expression.
Receiver	startSelectedParentNode(FleetingParentNode node, Location locationId)	Signal that an element has been found that matches the selection that this Watch is looking for.

Methods inherited from class com.saxonica.ee.stream.watch.ForEachAction

getAction, getBodyContext, getInversion, getWatchManager, isActionConsuming, makeBodyContext, setInversion

Methods inherited from class com.saxonica.ee.stream.feed.ItemFeed

append, dynamicError, getContext, getExpression, getResultFeed, getTerminator, hasFailed, processItems, setExpression, setHasFailed, setTerminator

Methods inherited from class net.sf.saxon.event.ProxyOutputter

attribute, characters, comment, endDocument, endElement, getNextOutputter, namespace, open, processingInstruction, setUnparsedEntity, startContent, startDocument, startElement, startElement, 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

IterateAction

public IterateAction(WatchManager watchManager,
 Expression expression,
 ItemFeed result,
 XPathContext context)

Method Details

open

public void open(Terminator terminator)
          throws XPathException

Description copied from class: ItemFeed

Start evaluating the expression. The default implementation does nothing.

Overrides:

open in class ForEachAction

Parameters:

terminator - used to achieve early exit

Throws:

XPathException - if a dynamic error occurs

startSelectedParentNode

public Receiver startSelectedParentNode(FleetingParentNode node,
 Location locationId)
                                 throws XPathException

Signal that an element has been found that matches the selection that this Watch is looking for. This method is called by the WatchManager while processing the startElement event that matches the selection. For this purpose, any attributes selected by the last step in the selection are ignored

Overrides:

startSelectedParentNode in class ForEachAction

Parameters:

node - the element or document node whose start event has been matched

locationId - the location associated with the element or document node (may be the location of the instruction that created it)

Returns:

a receiver that collects the contents of the selected node, or null

Throws:

ValidationException - May be raised if the constraint implemented by this Watch is violated @param locationId the location of the node in the source, or of the instruction that created it

XPathException - May be raised if a dynamic error occurs

append

public void append(Item it)
            throws XPathException

Signal that a node (other than an element) that matches the selection has been found.

Specified by:

append in interface Receiver

Overrides:

append in class ForEachAction

Parameters:

it - the node that was matched.

Throws:

XPathException - if the operation fails

endSelectedParentNode

public void endSelectedParentNode(Location locationId)
                           throws XPathException

Signal that the endElement event has occurred for the element whose startElement event caused the Watch to be activated.

Overrides:

endSelectedParentNode in class ForEachAction

Parameters:

locationId - the location of the node in the source, or of the instruction that created it

Throws:

ValidationException - May be raised if the constraint implemented by this Watch is violated @param locationId the location of the node in the source, or of the instruction that created it

XPathException - May be raised if a constraint implemented by this Watch is violated

close

public void close()
           throws XPathException

Description copied from class: ItemFeed

Finish evaluating the expression.

Specified by:

close in interface Receiver

Overrides:

close in class ForEachAction

Throws:

XPathException - if a dynamic error occurs