com.saxonica.stream.watch

Class StringValueWatch

java.lang.Object

com.saxonica.validate.AbstractWatch

com.saxonica.stream.watch.ComposingWatch

com.saxonica.stream.watch.StringValueWatch

All Implemented Interfaces:

Watch

public class StringValueWatch
extends ComposingWatch

This class is used when a streamed template requests evaluation of the string value of the nodes selected by a path expression, typically in response to an xsl:value-of instruction. The expression delivers a sequence of strings, one for each selected node.

Constructor Summary

Constructors

Constructor and Description
StringValueWatch(Feed result, Stack<XPathContext> contextStack)

Method Summary

Methods

Modifier and Type	Method and Description
void	endSelectedParentNode(int locationId) Signal that the endElement event has occurred for the element whose startElement event caused the Watch to be activated.
void	notifySelectedLeafNode(FleetingNode node, int locationId) Signal that a node (other than an element) that matches the selection has been found.
Receiver	startSelectedParentNode(FleetingNode node, int locationId) Signal that an element has been found that matches the selection that this Watch is looking for.

Methods inherited from class com.saxonica.stream.watch.ComposingWatch

close, getContext, getContextStack, getResult, open

Methods inherited from class com.saxonica.validate.AbstractWatch

getAnchorNode, getNamespaceResolver, getPipelineConfiguration, getSelection, setAnchorNode, setNamespaceResolver, setPipelineConfiguration, setSelection

Methods inherited from class java.lang.Object

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

Constructor Detail

StringValueWatch

public StringValueWatch(Feed result,
                Stack<XPathContext> contextStack)

Method Detail

startSelectedParentNode

public Receiver startSelectedParentNode(FleetingNode node,
                               int 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 ConstraintChecker while processing the startElement event that matches the selection. For this purpose, any attributes selected by the last step in the selection are ignored

Parameters:

node - the element that was found

locationId - information about the location in the stylesheet

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 the constraint implemented by this Watch is violated

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.

Parameters:

locationId - information about the location in the stylesheet

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

notifySelectedLeafNode

public void notifySelectedLeafNode(FleetingNode node,
                          int locationId)
                            throws XPathException

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

Specified by:

notifySelectedLeafNode in interface Watch

Overrides:

notifySelectedLeafNode in class AbstractWatch

Parameters:

node - the node that was matched.

locationId - information about the location in the stylesheet

Throws:

XPathException