TBAConstraint

Unit: BoldAttributes

Declaration

TBAConstraint = class(TBABoolean)

Hierarchy

1. TObject
2. TBoldMemoryManagedObject
3. TBoldFlaggedObject
4. TBoldSubscribableObject
5. TBoldElement
6. TBoldDomainElement
7. TBoldMember
8. TBoldAttribute
9. TBAValueSet
10. TBABoolean
11. TBAConstraint

Description

Constraints that are specified in the model can be evaluated and the result is an instance of TBAConstraint. This class inherits from TBABoolean, so it will have a truth-value corresponding to whether the constrain holds or is broken.

To indicate to a user what constraint is actually broken, each constraint has a number of string reperesentations:

• 1: (brDefault) N/Y
• 2: False/True
• 3: F/T
• 10: the model name of the constraint
• 11: the description of the constraint
• 12: the expression of the constraint
• 13: the DisplayName of the element that the constraint belongs to
• 14: the string representation of the element that the constraint belongs to

Given an object that has constraints, the following ocl expressions are useful:

• anObject.constraints: all constraints of the object
• anObject.constraints->select(c|**not** c): all broken constraints of the object
• anObject.constraints->select(c|**not** c)->isEmpty: true if the object has no broken constraints

Properties

Name	Summary	Notes
Constraint		read-only
OwningElement	The element that has the constraint	read-only

Constraint

property Constraint: TBoldConstraintRTInfo;

OwningElement

property OwningElement: TBoldElement;

Normally this will be aTBoldObject, but could be any element that can have constraints.

Methods

Name	Summary	Notes
Assign		override
DefaultSubscribe		override
Destroy		override
GetContentAsInteger		protected, override
GetStringRepresentation		protected, override
Initialize
InitializeMember		protected, override
SubscribeToStringRepresentation		override

Assign

procedure Assign(Source: TBoldElement); override; See also Ancestor Method

DefaultSubscribe

procedure DefaultSubscribe(Subscriber: TBoldSubscriber; RequestedEvent: TBoldEvent = breReEvaluate); override; See also Ancestor Method

Destroy

destructor Destroy; override; See also Ancestor Method

GetContentAsInteger

function GetContentAsInteger: Integer; override; See also Ancestor Method

GetStringRepresentation

function GetStringRepresentation(Representation: TBoldRepresentation): string; override; See also Ancestor Method

Initialize

procedure Initialize(Constraint: TBoldConstraintRTInfo; OwningElement: TBoldElement);

InitializeMember

procedure InitializeMember(OwningElement: TBoldDomainElement; ElementTypeInfo: TBoldElementTypeInfo); override; See also Ancestor Method

SubscribeToStringRepresentation

procedure SubscribeToStringRepresentation(Representation: TBoldRepresentation; Subscriber: TBoldSubscriber; RequestedEvent: TBoldEvent = breReEvaluate); override; See also Ancestor Method

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