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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 and sequence diagram for the Iterator design pattern. [4] In the above UML class diagram, the Client class refers (1) to the Aggregate interface for creating an Iterator object (createIterator()) and (2) to the Iterator interface for traversing an Aggregate object (next(),hasNext()).
In this UML class diagram, the Subject class does not update the state of dependent objects directly. Instead, Subject refers to the Observer interface ( update() ) for updating state, which makes the Subject independent of how the state of dependent objects is updated.
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.
A sample UML class and sequence diagram for the Flyweight design pattern. [6] The above UML class diagram shows: the Client class, which uses the flyweight pattern; the FlyweightFactory class, which creates and shares Flyweight objects; the Flyweight interface, which takes in extrinsic state and performs an operation
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 diagram for the adapter design pattern. [ 5 ] In the above UML class diagram , the client class that requires a target interface cannot reuse the adaptee class directly because its interface doesn't conform to the target interface.
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 ...