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java.lang.Objectcom.saxonica.validate.AbstractWatch
com.saxonica.validate.SelectorWatch
public abstract class SelectorWatch
A Watch represents a class that is interested in looking at nodes for the purpose of evaluating uniqueness and key constraints. A SelectorWatch looks for the nodes that match the selector in a unique, key, or keyref constraint. There are two concrete subclasses: one for key/unique, the other for keyref
| Constructor Summary | |
|---|---|
SelectorWatch(ConstraintChecker checker,
IdentityConstraint uniqueConstraint)
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| Method Summary | |
|---|---|
void |
addFieldValue(Value[] currentRow,
int column,
Value value,
boolean nillableElement,
long locationId)
The addFieldValue method is a callback from the FieldWatch created when this SelectorWatch is activated. |
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. |
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. |
protected String |
displayRow(Value[] row)
Internal method to display the contents of a row, for diagnostics |
void |
endSelectedParentNode(int locationId)
Signal that the endElement event has occurred for the element whose startElement event caused the Watch to be activated. |
IdentityConstraint |
getIdentityConstraint()
Get the identityConstraint implemented by this SelectorWatch |
protected void |
reportValidationError(ValidationException err,
long locationId)
Report a validation error |
protected void |
reportValidationError(ValidationException err,
SourceLocator locator)
Report a validation error |
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.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 |
|---|
public SelectorWatch(ConstraintChecker checker,
IdentityConstraint uniqueConstraint)
| Method Detail |
|---|
public IdentityConstraint getIdentityConstraint()
public Receiver startSelectedParentNode(FleetingNode node,
int locationId)
throws XPathException
startSelectedParentNode in interface Watchnode - the element or document node whose start event has been matchedlocationId - the location associated with the element or document node (may be
the location of the instruction that created it)
ValidationException - May be raised if the constraint implemented by this
Watch is violated
XPathException
public void endSelectedParentNode(int locationId)
throws ValidationException
endSelectedParentNode in interface WatchlocationId - the location of the element
ValidationException - May be raised if the constraint implemented by this
Watch is violated @param locationId
public void close()
throws ValidationException
close in interface Watchclose in class AbstractWatchValidationException
public void addFieldValue(Value[] currentRow,
int column,
Value value,
boolean nillableElement,
long locationId)
throws ValidationException
currentRow - identifying the node to which this field value
appliescolumn - identifies which of the fields participating in this constraint
the value relates tovalue - The value of the field that was encounterednillableElement - True if the field represents a nillable elementlocationId - the location of the data in the source document
ValidationException - May be raised if the value of the field violates
the constraint
protected void checkRow(Value[] currentRow,
boolean isTarget,
int locationId)
throws ValidationException
currentRow - the values of the set of fieldsisTarget - 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
ValidationException - is raised if the value of the row (that is,
the combination of fields) violates the constraintprotected String displayRow(Value[] row)
protected void reportValidationError(ValidationException err,
long locationId)
throws ValidationException
err - The validation exceptionlocationId - identifies the location in the source document or stylesheet/query where the
validation error was detected
ValidationException
protected void reportValidationError(ValidationException err,
SourceLocator locator)
throws ValidationException
err - The validation exceptionlocator - identifies the location in the source document or stylesheet/query where the
validation error was detected
ValidationException
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