com.saxonica.ee.validate

Class KeySelectorWatch

java.lang.Object

com.saxonica.ee.stream.watch.AbstractWatch

com.saxonica.ee.stream.watch.PatternWatch

com.saxonica.ee.validate.SelectorWatch

com.saxonica.ee.validate.KeySelectorWatch

All Implemented Interfaces:

Watch

public class KeySelectorWatch
extends SelectorWatch

This class watches the selector for a key or unique constraint

Constructor Summary

Constructors

Constructor and Description
KeySelectorWatch(ConstraintChecker checker, IdentityConstraint uniqueConstraint)

Method Summary

Modifier and Type	Method and Description
void	addKeyRef(RefSelectorWatch watch) Add a RefSelectorWatch to support a keyRef that refers to this key or unique constraints
protected void	checkRow(AtomicSequence[] currentRow, boolean isTarget, Location locationId) Method to check that a row (that is, the collection of fields corresponding to one selected node) is valid.

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

addFieldValue, close, 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

KeySelectorWatch

public KeySelectorWatch(ConstraintChecker checker,
                        IdentityConstraint uniqueConstraint)

Method Detail

addKeyRef

public void addKeyRef(RefSelectorWatch watch)

Add a RefSelectorWatch to support a keyRef that refers to this key or unique constraints

Parameters:

watch - the RefSelectorWatch which needs to be notified of all values encountered for this key

checkRow

protected void checkRow(AtomicSequence[] currentRow,
                        boolean isTarget,
                        Location locationId)
                 throws XPathException

Method to check that a row (that is, the collection of fields corresponding to one selected node) is valid. This implentation augments that in the superclass by notifying all interested keyref's of the values in this row.

Overrides:

checkRow in class SelectorWatch

Parameters:

currentRow - the values of the set of fields

isTarget - set to true if this is a value of the key referred to by a key reference, rather than a value for this constraint's own selected fields.

locationId - identifies the location of the selected node

Throws:

ValidationException - May be raised if the value of the row (that is, the combination of fields) violates the constraint

XPathException