com.saxonica.schema

Class KeyRef

java.lang.Object

com.saxonica.schema.SchemaStructure

com.saxonica.schema.IdentityConstraint

com.saxonica.schema.KeyRef

All Implemented Interfaces:

ComponentReference, SerializableSchemaComponent, UserSchemaComponent, Serializable, SourceLocator, SchemaComponent

public class KeyRef
extends IdentityConstraint
implements ComponentReference

This class represents an xs:keyRef identity constraint in a schema

See Also:

Serialized Form

Field Summary

Fields inherited from interface net.sf.saxon.type.SchemaComponent

COMPONENT_FUNCTION_TYPE, FIXED_UP, INCOMPLETE, INVALID, UNVALIDATED, VALIDATED, VALIDATING

Constructor Summary

Constructors

Constructor and Description
KeyRef() Create a KeyRef object representing an xs:keyref constraints
KeyRef(int refer) Create a new KeyRef Identity-Constraint.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	fixup(SchemaCompiler compiler) Check references from this component to other components
int	getReferFingerprint() Gets the fingerprint of the name of the key being referenced).
int	getSymbolSpace() Get the symbol space of the target of this reference
SchemaComponent	getTarget() Get the schema component identified by this reference.
boolean	isResolved() Determine whether this reference has been resolved
void	setReferFingerprint(int referFingerprint) Sets the fingerprint of the name of the key being referenced.
void	setTargetKey(IdentityConstraint key) Set the target key or unique constraint
void	tryToResolve(SchemaCompiler compiler) Try to resolve the reference if possible, relative to components present in a given schema.
boolean	validate(SchemaCompiler compiler) Checks the validity of this Schema defintion.

Methods inherited from class com.saxonica.schema.IdentityConstraint

addField, elaborate, getComponentAsFunction, getFields, getFingerprint, getName, getSelector, getTargetNamespace, serialize, setNameCode, setSelector, typeCheck

Methods inherited from class com.saxonica.schema.SchemaStructure

getColumnNumber, getConfiguration, getFixupStatus, getLineNumber, getPublicId, getRedefinitionLevel, getSchemaDocumentURI, getSystemId, getValidationStatus, lookForCycles, makeXPathExpressionPropertyRecord, setConfiguration, setFixupStatus, setLineNumber, setLocator, setRedefinitionLevel, setSchemaDocumentURI, setSystemId, setValidationStatus

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.saxonica.schema.ComponentReference

getConfiguration, getFingerprint

Methods inherited from interface javax.xml.transform.SourceLocator

getColumnNumber, getLineNumber, getPublicId, getSystemId

Methods inherited from interface com.saxonica.schema.UserSchemaComponent

lookForCycles

Methods inherited from interface net.sf.saxon.type.SchemaComponent

getRedefinitionLevel, getValidationStatus

Constructor Detail

KeyRef

public KeyRef()

Create a KeyRef object representing an xs:keyref constraints

KeyRef

public KeyRef(int refer)

Create a new KeyRef Identity-Constraint.

Parameters:

refer - the fingerprint of the referenced key.

Method Detail

getReferFingerprint

public int getReferFingerprint()

Gets the fingerprint of the name of the key being referenced).

Returns:

the fingerprint of the name of the key to reference.

setReferFingerprint

public void setReferFingerprint(int referFingerprint)

Sets the fingerprint of the name of the key being referenced.

Parameters:

referFingerprint - the fingerprint of the name of the key to reference.

setTargetKey

public void setTargetKey(IdentityConstraint key)

Set the target key or unique constraint

Parameters:

key - the target key definition or unique constraint

tryToResolve

public void tryToResolve(SchemaCompiler compiler)

Try to resolve the reference if possible, relative to components present in a given schema. No error occurs if the reference cannot yet be resolved.

Specified by:

tryToResolve in interface ComponentReference

Parameters:

compiler - The schema containing the candidate target components for the reference. If null, the schema containing the reference is used.

isResolved

public boolean isResolved()

Determine whether this reference has been resolved

Specified by:

isResolved in interface ComponentReference

Returns:

true if the reference has been resolved to a schema component

getTarget

public SchemaComponent getTarget()
                          throws UnresolvedReferenceException

Get the schema component identified by this reference.

Specified by:

getTarget in interface ComponentReference

Returns:

the schema component if the reference has been resolved.

Throws:

UnresolvedReferenceException - if the reference has not been resolved. Note that this is an unchecked exception.

getSymbolSpace

public int getSymbolSpace()

Get the symbol space of the target of this reference

Specified by:

getSymbolSpace in interface ComponentReference

Returns:

an integer code identifying the symbol space

fixup

public boolean fixup(SchemaCompiler compiler)
              throws SchemaException

Check references from this component to other components

Specified by:

fixup in interface UserSchemaComponent

Overrides:

fixup in class IdentityConstraint

Parameters:

compiler - used for reporting error messages

Returns:

true if all is well, false if errors found

Throws:

SchemaException

validate

public boolean validate(SchemaCompiler compiler)
                 throws SchemaException

Checks the validity of this Schema defintion.

Specified by:

validate in interface UserSchemaComponent

Overrides:

validate in class IdentityConstraint

Returns:

true when this Schema definition is valid, otherwise false.

Throws:

SchemaException - when this Schema definition is invalid.