com.saxonica.validate
Class KeySelectorWatch

java.lang.Object
  com.saxonica.validate.AbstractWatch
      com.saxonica.validate.SelectorWatch
          com.saxonica.validate.KeySelectorWatch

All Implemented Interfaces:

Watch

public class KeySelectorWatch
extends SelectorWatch

This class watches the selector for a key or unique constraint

Constructor Summary

KeySelectorWatch(ConstraintChecker checker, IdentityConstraint uniqueConstraint)

Method Summary

void	addKeyRef(RefSelectorWatch watch) Add a RefSelectorWatch to support a keyRef that refers to this key or unique constraints
protected void	checkRow(Value[] currentRow, boolean isTarget, int 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.validate.SelectorWatch

addFieldValue, close, displayRow, endSelectedParentNode, getIdentityConstraint, reportValidationError, reportValidationError, startSelectedParentNode

Methods inherited from class com.saxonica.validate.AbstractWatch

getAnchorNode, getNamespaceResolver, getPipelineConfiguration, getSelection, notifySelectedLeafNode, open, 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

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

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(Value[] currentRow,
                        boolean isTarget,
                        int locationId)
                 throws ValidationException

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