Class UML 2.5::Extension
Description:
An extension is used to indicate that the properties of a metaclass are
extended through a stereotype, and gives the ability to flexibly add (and
later remove) stereotypes to classes.
Direct Superclasses: AssociationDirect Subclasses: Class Precedence List: Extension,
Association,
Relationship,
Classifier,
Namespace,
Type,
PackageableElement,
ParameterableElement,
TemplateableElement,
RedefinableElement,
NamedElement,
ElementProperties:
isRequired : Boolean (1 1); -- source
Extension metaclass :
Class (1 1); -- source
Extension ownedEnd :
ExtensionEnd (1 1); -- source
Extension endType :
Type (1 *); -- source
Association isDerived : Boolean (1 1); -- source
Association memberEnd :
Property (2 *); -- source
Association navigableOwnedEnd :
Property (0 *); -- source
Association relatedElement :
Element (1 *); -- source
Relationship attribute :
Property (0 *); -- source
Classifier collaborationUse :
CollaborationUse (0 *); -- source
Classifier feature :
Feature (0 *); -- source
Classifier general :
Classifier (0 *); -- source
Classifier generalization :
Generalization (0 *); -- source
Classifier inheritedMember :
NamedElement (0 *); -- source
Classifier isAbstract : Boolean (1 1); -- source
Classifier isFinalSpecialization : Boolean (1 1); -- source
Classifier ownedTemplateSignature :
RedefinableTemplateSignature (0 1); -- source
Classifier ownedUseCase :
UseCase (0 *); -- source
Classifier powertypeExtent :
GeneralizationSet (0 *); -- source
Classifier redefinedClassifier :
Classifier (0 *); -- source
Classifier representation :
CollaborationUse (0 1); -- source
Classifier substitution :
Substitution (0 *); -- source
Classifier templateParameter :
ClassifierTemplateParameter (0 1); -- source
Classifier useCase :
UseCase (0 *); -- source
Classifier elementImport :
ElementImport (0 *); -- source
Namespace importedMember :
PackageableElement (0 *); -- source
Namespace member :
NamedElement (0 *); -- source
Namespace ownedMember :
NamedElement (0 *); -- source
Namespace ownedRule :
Constraint (0 *); -- source
Namespace packageImport :
PackageImport (0 *); -- source
Namespace package :
Package (0 1); -- source
Type visibility :
VisibilityKind (0 1); -- source
PackageableElement owningTemplateParameter :
TemplateParameter (0 1); -- source
ParameterableElement templateBinding :
TemplateBinding (0 *); -- source
TemplateableElement isLeaf : Boolean (1 1); -- source
RedefinableElement redefinedElement :
RedefinableElement (0 *); -- source
RedefinableElement redefinitionContext :
Classifier (0 *); -- source
RedefinableElement clientDependency :
Dependency (0 *); -- source
NamedElement name : String (0 1); -- source
NamedElement nameExpression :
StringExpression (0 1); -- source
NamedElement namespace :
Namespace (0 1); -- source
NamedElement qualifiedName : String (0 1); -- source
NamedElement ownedComment :
Comment (0 *); -- source
Element ownedElement :
Element (0 *); -- source
Element owner :
Element (0 1); -- source
ElementConstraints:
No additional constraints.
Operations:
Signature: metaclassEnd() : Property;
Description: The query metaclassEnd() returns the Property that is typed by a metaclass
(as opposed to a stereotype).
The OCL used here is not normative.Editor's notes: Rewritten to find the memberEnd that is a ExtensionEnd.
Expression: memberEnd->select(type.oclIsKindOf(Stereotype))->any(true)
Original: result = (memberEnd->reject(p | ownedEnd->includes(p.oclAsType(ExtensionEnd)))->any(true))
Signature: metaclass.1() : Class;
Description: The query metaclass() returns the metaclass that is being extended (as
opposed to the extending stereotype).
Expression: result = (metaclassEnd().type.oclAsType(Class))
Signature: isRequired.1() : Boolean;
Description: The query isRequired() is true if the owned end has a multiplicity with
the lower bound of 1.
Expression: result = (ownedEnd.lowerBound() = 1)
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