com.saxonica.ee.stream.watch

Class ApplyTemplatesAction

java.lang.Object

com.saxonica.ee.stream.feed.ItemFeed

com.saxonica.ee.stream.watch.ApplyTemplatesAction

All Implemented Interfaces:

Feed

Direct Known Subclasses:

ApplyImportsAction, NextMatchAction

public class ApplyTemplatesAction
extends ItemFeed

This watch implements xsl:apply-templates in streaming mode. It watches for the nodes selected by the xsl:apply-templates 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.

Constructor Summary

Constructors

Constructor and Description
ApplyTemplatesAction(Expression expression, Feed result, XPathContext context)

Method Summary

Methods

Modifier and Type	Method and Description
void	close() Finish evaluating the expression.
void	computeActualParams(WithParam[] params)
void	computeTunnelParams(WithParam[] params)
void	endSelectedParentNode(int locationId) Signal that the endElement event has occurred for the element whose startElement event caused the Watch to be activated.
protected XPathContext	getLocalContext()
Mode	getMode()
protected Rule	getRule(FleetingNode node) Get the template rule matching a specific node
void	open(Terminator terminator) Start evaluating the expression.
void	processItem(Item item) Signal that a item (other than a streamed element) that matches the selection has been found.
void	setActualParams(ParameterSet params)
void	setMode(Mode mode)
void	setTunnelParams(ParameterSet params)
void	setWatchManager(WatchManager watchManager)
Receiver	startSelectedParentNode(FleetingParentNode node, int 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

dynamicError, getContext, getExpression, getPipelineConfiguration, getReceiver, getResult, getTerminator, hasFailed, processItems, setExpression, setHasFailed, setPipelineConfiguration, setTerminator

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ApplyTemplatesAction

public ApplyTemplatesAction(Expression expression,
                    Feed result,
                    XPathContext context)

Method Detail

open

public void open(Terminator terminator)
          throws XPathException

Description copied from class: ItemFeed

Start evaluating the expression. The default implementation does nothing.

Specified by:

open in interface Feed

Overrides:

open in class ItemFeed

Parameters:

terminator - used to achieve early exit

Throws:

XPathException - if a dynamic error occurs

computeActualParams

public void computeActualParams(WithParam[] params)
                         throws XPathException

Throws:

XPathException

computeTunnelParams

public void computeTunnelParams(WithParam[] params)
                         throws XPathException

Throws:

XPathException

setActualParams

public void setActualParams(ParameterSet params)
                     throws XPathException

Throws:

XPathException

setTunnelParams

public void setTunnelParams(ParameterSet params)
                     throws XPathException

Throws:

XPathException

getLocalContext

protected XPathContext getLocalContext()

setMode

public void setMode(Mode mode)

getMode

public Mode getMode()

setWatchManager

public void setWatchManager(WatchManager watchManager)

startSelectedParentNode

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

Signal 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.

Specified by:

startSelectedParentNode in interface Feed

Overrides:

startSelectedParentNode in class ItemFeed

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 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

getRule

protected Rule getRule(FleetingNode node)
                throws XPathException

Get the template rule matching a specific node

Parameters:

node - the node (in a streamed input document) to be matched

Returns:

the best-fit template rule used to process this node

Throws:

XPathException - if a dynamic error occurs

processItem

public void processItem(Item item)
                 throws XPathException

Signal that a item (other than a streamed element) that matches the selection has been found.

Specified by:

processItem in interface Feed

Specified by:

processItem in class ItemFeed

Parameters:

item - the item that was matched.

Throws:

XPathException - May be raised if a dynamic error occurs

endSelectedParentNode

public void endSelectedParentNode(int locationId)
                           throws XPathException

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

Specified by:

endSelectedParentNode in interface Feed

Overrides:

endSelectedParentNode in class ItemFeed

Parameters:

locationId - the location of the element

Throws:

ValidationException - May be raised if the constraint implemented by this Watch is violated @param locationId

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. The default implementation does nothing.

Specified by:

close in interface Feed

Overrides:

close in class ItemFeed

Throws:

XPathException - if a dynamic error occurs