com.saxonica.ee.validate

Class RefSelectorWatch

java.lang.Object

com.saxonica.ee.stream.watch.AbstractWatch

com.saxonica.ee.stream.watch.PatternWatch

com.saxonica.ee.validate.SelectorWatch

com.saxonica.ee.validate.RefSelectorWatch

All Implemented Interfaces:

Watch

public class RefSelectorWatch
extends SelectorWatch

This class watches the selector for a keyref constraint

Constructor Summary

Constructors

Constructor and Description
RefSelectorWatch(ConstraintChecker checker, KeyRef constraint) Create a watch for values that might satisfy a keyref constraint

Method Summary

Modifier and Type	Method and Description
void	close() The close() method is called immediately before the Watch is destroyed, that is, when the element whose declaration scopes the constraint implemented by this Watch goes out of scope.
void	notifyActualKey(AtomicSequence[] keyValue, Location locationId) Notify a value selected by this KeyRef

Methods inherited from class com.saxonica.ee.validate.SelectorWatch

addFieldValue, checkRow, endSelectedParentNode, getIdentityConstraint, reportValidationError, startSelectedParentNode

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

getAnchorNode, getSelection, matchesNode, matchesNodesOfKind, open, processItem, setAnchorNode, setSelection

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

getNamespaceResolver, getPipelineConfiguration, getReceiver, setNamespaceResolver, setPipelineConfiguration

Methods inherited from class java.lang.Object

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

Constructor Detail

RefSelectorWatch

public RefSelectorWatch(ConstraintChecker checker,
                        KeyRef constraint)

Create a watch for values that might satisfy a keyref constraint

Parameters:

checker - the ConstraintChecker that initiated this watch

constraint - the constraint being checked

Method Detail

notifyActualKey

public void notifyActualKey(AtomicSequence[] keyValue,
                            Location locationId)
                     throws XPathException

Notify a value selected by this KeyRef

Parameters:

keyValue - an array holding the components (fields) making up the keyref value

locationId - the location of the node containing the keyref values

Throws:

ValidationException - if the value is invalid for example a duplicate

XPathException

close

public void close()
           throws XPathException

The close() method is called immediately before the Watch is destroyed, that is, when the element whose declaration scopes the constraint implemented by this Watch goes out of scope. This implementation searches the list of all key values encountered looking (a) for key references that reference no corresponding key value (b) for key references that reference more than one corresponding key value (which can happen if the keyref and the key are defined at different levels of hierarchy.

Specified by:

close in interface Watch

Overrides:

close in class SelectorWatch

Throws:

XPathException - May be raised if a dynamic error occurs