com.saxonica.schema

Class IdentityConstraint

java.lang.Object

com.saxonica.schema.SchemaStructure

com.saxonica.schema.IdentityConstraint

All Implemented Interfaces:

SerializableSchemaComponent, UserSchemaComponent, Serializable, SourceLocator, SchemaComponent

Direct Known Subclasses:

Key, KeyRef, Unique

public abstract class IdentityConstraint
extends SchemaStructure
implements UserSchemaComponent, SerializableSchemaComponent

The base class for the XML Schema Identity Constraints (key, keyref, unique).

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

Modifier	Constructor and Description
protected	IdentityConstraint() Constructor used by sub-classes.

Method Summary

Methods

Modifier and Type	Method and Description
void	addField(IdentityField field) Adds the given IdentityField to this IdentityConstraint
void	elaborate(SchemaCompiler compiler) Elaborate the schema component: after reloading a serialized schema component model, this expands the component with derived information needed during validation episodes.
boolean	fixup(SchemaCompiler compiler) Check references from this component to other components
FunctionItem	getComponentAsFunction() Get the schema component in the form of a function item.
List<IdentityField>	getFields() Returns the List of Fields contained within this IdentityConstraint.
int	getFingerprint() Get the fingerprint of the name of this identity constraint
String	getName() Return the name of this IdentityConstraint.
IdentitySelector	getSelector() Returns the selector of this IdentityConstraint.
String	getTargetNamespace() Return the target namespace of this IdentityConstraint.
void	serialize(SchemaModelSerializer serializer) Serialize the identity constraint as part of the serialized Schema Component Model
void	setNameCode(int nc) Set the integer cdde of the name of this identity constraint
void	setSelector(IdentitySelector selector) Sets the selector for this IdentityConstraint.
void	typeCheck(SchemaCompiler compiler, SchemaType contextType) Typecheck the selector and the fields.
boolean	validate(SchemaCompiler compiler) Checks the validity of this Schema defintion.

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.UserSchemaComponent

lookForCycles

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

getRedefinitionLevel, getValidationStatus

Constructor Detail

IdentityConstraint

protected IdentityConstraint()

Constructor used by sub-classes. Creates a new IdentityConstraint.

Method Detail

addField

public void addField(IdentityField field)

Adds the given IdentityField to this IdentityConstraint

Parameters:

field - the IdentityField to add.

getFields

public List<IdentityField> getFields()

Returns the List of Fields contained within this IdentityConstraint.

Returns:

the List of fields

getName

public String getName()

Return the name of this IdentityConstraint. This value will never be null.

Returns:

the name of this IdentityConstraint

getTargetNamespace

public String getTargetNamespace()

Return the target namespace of this IdentityConstraint.

Returns:

the target namespace of this IdentityConstraint. Return null if the target namespace is "absent".

getSelector

public IdentitySelector getSelector()

Returns the selector of this IdentityConstraint.

Returns:

the IdentitySelector of this IdentityConstraint

setSelector

public void setSelector(IdentitySelector selector)
                 throws SchemaException

Sets the selector for this IdentityConstraint.

Parameters:

selector - the Selector for this IdentityConstraint. Must not be null.

Throws:

SchemaException - if selector is null.

setNameCode

public void setNameCode(int nc)

Set the integer cdde of the name of this identity constraint

Parameters:

nc - the namecode

getFingerprint

public int getFingerprint()

Get the fingerprint of the name of this identity constraint

Returns:

the integer fingerprint of the component's name

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 SchemaStructure

Parameters:

compiler - the schema compiler

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

Returns:

true when this Schema definition is valid, otherwise false.

Throws:

SchemaException

typeCheck

public void typeCheck(SchemaCompiler compiler,
             SchemaType contextType)
               throws XPathException

Typecheck the selector and the fields. This reports warnings if the XPath expressions used in defining the constraint cannot select anything, or under similar conditions

Parameters:

compiler - the schema compiler

contextType - the type of the element whose constraint is being defined

Throws:

XPathException - if a type error is found

elaborate

public void elaborate(SchemaCompiler compiler)
               throws SchemaException

Elaborate the schema component: after reloading a serialized schema component model, this expands the component with derived information needed during validation episodes. The model is assumed to be valid.

Specified by:

elaborate in interface UserSchemaComponent

Overrides:

elaborate in class SchemaStructure

Parameters:

compiler - the schema compiler

Throws:

SchemaException

serialize

public void serialize(SchemaModelSerializer serializer)
               throws XPathException

Serialize the identity constraint as part of the serialized Schema Component Model

Specified by:

serialize in interface SerializableSchemaComponent

Parameters:

serializer - the object responsible for performing the serialization

Throws:

XPathException - if serialization fails

getComponentAsFunction

public FunctionItem getComponentAsFunction()

Description copied from interface: SchemaComponent

Get the schema component in the form of a function item. This allows schema information to be made visible to XSLT or XQuery code. The function makes available the contents of the schema component as defined in the XSD specification. The function takes a string as argument representing a property name, and returns the corresponding property of the schema component. There is also a property "class" which returns the kind of schema component, for example "Attribute Declaration".

Specified by:

getComponentAsFunction in interface SchemaComponent

Returns:

the schema component represented as a function from property names to property values.