Class UML 2.3::OpaqueExpression
Description:
Provides a mechanism for precisely defining the behavior of an opaque expression.
An opaque expression is defined by a behavior restricted to return one
result.
Direct Superclasses: ValueSpecificationDirect Subclasses: Class Precedence List: OpaqueExpression,
ValueSpecification,
PackageableElement,
ParameterableElement,
TypedElement,
NamedElement,
ElementProperties:
behavior :
Behavior (0 1); -- source
OpaqueExpression body : String (0 *); -- source
OpaqueExpression language : String (0 *); -- source
OpaqueExpression result :
Parameter (0 1); -- source
OpaqueExpression visibility :
VisibilityKind (1 1); -- source
PackageableElement owningTemplateParameter :
TemplateParameter (0 1); -- source
ParameterableElement templateParameter :
TemplateParameter (0 1); -- source
ParameterableElement type :
Type (0 1); -- source
TypedElement clientDependency :
Dependency (0 *); -- source
NamedElement name : String (0 1); -- source
NamedElement The name of the 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:
Signature: CMOF_14_3_31() : Boolean;
Description: 14.3 [31] The body of an OpaqueExpression must not be empty.
see also: https://sites.google.com/site/metamodelingantipatterns/catalog/mof/opaque-expression-has-no-or-empty-body
Expression: body->notEmpty() and body <> ''
Signature: only_return_result_parameters() : Boolean;
Description: The behavior may only have return result parameters.
The OCL used here is not normative.Editor's notes: ownedParameter, not ownedParameters.
Expression: self.behavior.notEmpty() implies
self.behavior.ownedParameter->select(p | p.direction<>#return)->isEmpty()
Original: self.behavior.notEmpty() implies
self.behavior.ownedParameters->select(p | p.direction<>#return)->isEmpty()
Signature: one_return_result_parameter() : Boolean;
Description: The behavior must have exactly one return result parameter.
Expression: self.behavior.notEmpty() implies
self.behavior.ownedParameter->select(p | p.direction=#return)->size() = 1
Signature: language_body_size() : Boolean;
Description: If the language attribute is not empty, then the size of the body and language
arrays must be the same.
Expression: language->notEmpty() implies (body->size() = language->size())
Operations:
Signature: value() : Integer;
Description: The query value() gives an integer value for an expression intended to produce one.
Expression: true
Signature: isPositive() : Boolean;
Description: The query isPositive() tells whether an integer expression has a positive value.
Expression: result = false
Signature: isNonNegative() : Boolean;
Description: The query isNonNegative() tells whether an integer expression has a non-negative value.
Expression: result = false
Signature: isIntegral() : Boolean;
Description: The query isIntegral() tells whether an expression is intended to produce an integer.
Expression: result = false
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