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In the above UML class diagram, the Creator class that requires a Product object does not instantiate the Product1 class directly. Instead, the Creator refers to a separate factoryMethod() to create a product object, which makes the Creator independent of the exact concrete class that is instantiated.
The use of object diagrams is fairly limited, namely to show examples of data structure." The latest UML 2.5.1 specification does not explicitly define object diagrams, [4] but provides a notation for "instances" of classifiers. [4]: 126 Object diagrams and class diagrams are closely related [5] and use almost identical notation. [6]
A sample UML class diagram and sequence diagram for the Visitor design pattern. [4] In the UML class diagram above, ... C# example This example ...
In the above UML class diagram, the Director class doesn't create and assemble the ProductA1 and ProductB1 objects directly. Instead, the Director refers to the Builder interface for building (creating and assembling) the parts of a complex object, which makes the Director independent of which concrete classes are instantiated (which ...
A sample UML class and sequence diagram for the Memento design pattern. [1]In the above UML class diagram, the Caretaker class refers to the Originator class for saving (createMemento()) and restoring (restore(memento)) originator's internal state.
A sample UML class and sequence diagram for the Command design pattern. [3]In the above UML class diagram, the Invoker class doesn't implement a request directly. Instead, Invoker refers to the Command interface to perform a request (command.execute()), which makes the Invoker independent of how the request is performed.
The Mediator1 class implements the interaction between Colleague1 and Colleague2. The UML sequence diagram shows the run-time interactions. In this example, a Mediator1 object mediates (controls and coordinates) the interaction between Colleague1 and Colleague2 objects.
The UML sequence diagram shows the run-time interactions: In this example, the Sender object calls handleRequest() on the receiver1 object (of type Handler). The receiver1 forwards the request to receiver2, which in turn forwards the request to receiver3, which handles (performs) the request.