com.saxonica.ee.schema

Class KeyRef

java.lang.Object

com.saxonica.ee.schema.SchemaStructure

com.saxonica.ee.schema.IdentityConstraint

com.saxonica.ee.schema.KeyRef

All Implemented Interfaces:

ComponentReference, SerializableSchemaComponent, UserSchemaComponent, javax.xml.transform.SourceLocator, Location, SchemaComponent, org.xml.sax.Locator

public class KeyRef
extends IdentityConstraint
implements ComponentReference

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

Nested Class Summary

Nested classes/interfaces inherited from interface net.sf.saxon.type.SchemaComponent

SchemaComponent.ValidationStatus

Field Summary

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

COMPONENT_FUNCTION_TYPE

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
boolean	fixup(SchemaCompiler compiler) Check references from this component to other components
java.lang.String	getConstraintCategory() The type of constraint: one of "key", "unique", or "keyref"
int	getSymbolSpace() Get the symbol space of the target of this reference
SchemaComponent	getTarget() Get the schema component identified by this reference.
StructuredQName	getTargetComponentName() Get the name of the target of this reference
boolean	isDangling() Ask whether this is known to be a dangling reference
boolean	isResolved() Determine whether this reference has been resolved
void	setTargetComponentName(StructuredQName target) Sets 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.ee.schema.IdentityConstraint

addField, elaborate, getComponentAsFunction, getConstraintName, getFields, getName, getSelector, getTargetNamespace, isSameDeclaration, serialize, setConstraintName, setSelector, typeCheck

Methods inherited from class com.saxonica.ee.schema.SchemaStructure

getColumnNumber, getConfiguration, getFixupStatus, getGeneratedId, getLineNumber, getPublicId, getRedefinitionLevel, getSchemaDocumentURI, getSystemId, getValidationStatus, hasSameLocation, isValidationNeeded, lookForCycles, makeXPathExpressionPropertyRecord, saveLocation, setConfiguration, setFixupStatus, setGeneratedId, 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.ee.schema.ComponentReference

getConfiguration

Methods inherited from interface net.sf.saxon.expr.parser.Location

getColumnNumber, getLineNumber, getPublicId, getSystemId, saveLocation

Methods inherited from interface com.saxonica.ee.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(EnterpriseConfiguration config,
              StructuredQName refer)

Create a new KeyRef Identity-Constraint.

Parameters:

config - the configuration

refer - the name of the referenced key.

Method Detail

getConstraintCategory

public java.lang.String getConstraintCategory()

Description copied from class: IdentityConstraint

The type of constraint: one of "key", "unique", or "keyref"

Specified by:

getConstraintCategory in class IdentityConstraint

Returns:

one of "key", "unique", or "keyref" (note the spelling)

getTargetComponentName

public StructuredQName getTargetComponentName()

Get the name of the target of this reference

Specified by:

getTargetComponentName in interface ComponentReference

Returns:

the component name

setTargetComponentName

public void setTargetComponentName(StructuredQName target)

Sets the name of the key being referenced.

Parameters:

target - 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

isDangling

public boolean isDangling()

Ask whether this is known to be a dangling reference

Specified by:

isDangling in interface ComponentReference

Returns:

true if the target of this component reference is known to be absent, and if a warning has been issued to this effect

getTarget

public SchemaComponent getTarget()
                          throws MissingComponentException

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:

MissingComponentException - 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.