com.saxonica.stream.watch
Class StringValueWatch

java.lang.Object
  extended by com.saxonica.validate.AbstractWatch
      extended by com.saxonica.stream.watch.ComposingWatch
          extended by com.saxonica.stream.watch.StringValueWatch
All Implemented Interfaces:
Watch

public class StringValueWatch
extends ComposingWatch
implements Watch

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
StringValueWatch(Feed result, Stack<XPathContext> contextStack)
           
 
Method Summary
 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
 
Methods inherited from interface com.saxonica.stream.watch.Watch
close, getAnchorNode, getNamespaceResolver, getPipelineConfiguration, getSelection, open, setAnchorNode, setNamespaceResolver, setPipelineConfiguration, setSelection
 

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

Specified by:
startSelectedParentNode in interface Watch
Parameters:
node -
locationId - @throws net.sf.saxon.type.ValidationException May be raised if the constraint implemented by this Watch is violated
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.
Throws:
ValidationException - May be raised if the constraint implemented by this Watch is violated
XPathException

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 Watch
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

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 -
Throws:
XPathException


Copyright (c) 2004-2011 Saxonica Limited. All rights reserved.