HOW TO：使用 UML API 瀏覽關聯性

發行項
02/28/2013

在 Visual Studio Ultimate 中，模型會包含由不同類型的關聯性連結在一起的項目。此主題將說明如何巡覽程式碼中的模型。

巡覽關聯性

任何關聯性

使用 GetRelatedElements<T>() 尋找所有與指定項目連接的項目。將 T 設為 IRelationship 以巡覽所有類型的關聯性，或是使用更明確的型別 (例如 IAssociation) 僅巡覽該型別。

IElement anElement;
// Select all elements related to anElement.
Context.CurrentDiagram.SelectShapes (
   anElement.GetRelatedElements<IRelationship>()
    .SelectMany(e=>e.Shapes()).ToArray());

使用 GetRelatedLinks<T>() 尋找所有與項目連接的關聯性。

// Process all relationships connected to an element.
foreach (IRelationship relationship in 
   anElement.GetRelatedLinks<IRelationship>())
{
  Debug.Assert(relationship.SourceElement == anElement
      || relationship.TargetElement == anElement);
}

關聯

關聯是兩個屬性之間的關聯性，這兩個屬性各屬於一個 Classifier。

IClassifier classifier; // class, interface, component, actor, ...
// Get all the associations sourced from this classifier
foreach (IProperty p in classifier.GetOutgoingAssociationEnds())
{
  // p represents the end further end of an association.
  IType oppositeElement = p.Type; 
    // The type to which this association connects classifier
  
  IProperty oppositeProperty = p.Opposite;
    // The nearer end of the association.
  Debug.Assert(oppositeProperty.Type == classifier);
  IAssociation association = p.Association;
  Debug.Assert(association.MemberEnds.Contains(p)
     && association.MemberEnds.Contains(oppositeProperty));
}

Generalization 和 Realization

存取 Generalization 的另一端：

foreach (IClassifier supertype in classifier.Generals) {…}
foreach (IClassifier subtype in classifier.GetSpecifics()) {…}
Access the relationship itself:
foreach (IGeneralization gen in classifier.Generalizations) 
{ Debug.Assert(classifier == gen.Specific); }

/// InterfaceRealization:
IEnumerable<IInterface> GetRealizedInterfaces
    (this IBehavioredClassifier classifier);
IEnumerable<IBehavioredClassifier> GetRealizingClassifiers
    (this IInterface interface);

相依性

/// Returns the elements depending on this element
IEnumerable<INamedElement> GetDependencyClients(this INamedElement element); 
/// Returns the elements this element depends on
IEnumerable<INamedElement> INamedElement GetDependencySuppliers(this INamedElement element);

Activity Edge

/// Returns the nodes targeted by edges outgoing from this one
IEnumerable<IActivityNode> GetActivityEdgeTargets(this IActivityNode node);
/// Returns the nodes sourcing edges incoming to this one
IEnumerable<IActivityNode> GetActivityEdgeSources(this IActivityNode node);

連接器 (組件和委派)

/// Returns the elements connected via assembly 
/// or delegation to this one
IEnumerable<IConnectableElement> GetConnectedElements(this IConnectableElement element);

訊息和生命線

IEnumerable<IMessage> GetAllOutgoingMessages(this ILifeline  lifeline); 
// both from lifeline and execution occurrences
IEnumerable<IMessage> GetAllIncomingMessages(this ILifeline  lifeline);
ILifeline GetSourceLifeline(this IMessage message); 
    // may return null for found messages
ILifeline GetTargetLifeline(this IMessage message);  
    // may return null for lost messages

封裝匯入

IEnumerable<IPackage>GetImportedPackages(this INamespace namespace);
IEnumerable<INamespace> GetImportingNamespaces(this IPackage package);

使用案例擴充和包含

IEnumerable<IUseCase>GetExtendedCases(this IUseCase usecase);
IEnumerable<IUseCase>GetExtendingCases(this IUseCase usecase);
IEnumerable<IUseCase>GetIncludedCases(this IUseCase usecase);
IEnumerable<IUseCase>GetIncludingCases(this IUseCase usecase);

列舉關聯性

所有會傳回多個值的 UML 模型屬性，均符合 IEnumerable<> 介面。這表示您可以使用 LINQ 查詢運算式和 System.Linq 命名空間中定義的擴充方法。

例如：

from shape in     Context.CurrentDiagram.GetSelectedShapes<IClassifier>()
where shape.Color == System.Drawing.Color.Red
select shape.Element

請參閱

概念

擴充 UML 模型與圖表

HOW TO：巡覽 UML 模型

共用方式為