Adapter in VB.NET

Convert the interface of a class into another interface clients expect. Adapter lets classes work together that couldn't otherwise because of incompatible interfaces. These incompatible classes may come from different libraries or frameworks.

Please download project with this source code from https://github.com/ViacheslavUKR/StandardDisignOopPattern

   1:      ' Adapter Design Pattern.

   2:      ' See description in //www.vb-net.com/ProgramTheory/Adapter.htm

   3:      Class MainApp

   4:          ' Entry point into console application.

   5:          Private Shared Sub Main()

   6:              ' Create adapter and place a request

   7:              Dim target As Target = New Adapter()

   8:              target.Request()

   9:              ' Wait for user

  10:              Console.ReadKey()

  11:          End Sub

  12:      End Class

  13:   

  14:      ' The 'Target' class

  15:      Class Target

  16:          Public Overridable Sub Request()

  17:              Console.WriteLine("Called Target Request()")

  18:          End Sub

  19:      End Class

  20:   

  21:      ' The 'Adapter' class

  22:      Class Adapter

  23:          Inherits Target

  24:          Private _adaptee As New Adaptee()

  25:          Public Overrides Sub Request()

  26:              ' Possibly do some other work

  27:              '  and then call SpecificRequest

  28:              _adaptee.SpecificRequest()

  29:          End Sub

  30:      End Class

  31:   

  32:      ' The 'Adaptee' class

  33:      Class Adaptee

  34:          Public Sub SpecificRequest()

  35:              Console.WriteLine("Called SpecificRequest()")

  36:          End Sub

  37:      End Class

• Abstract Factory in VB.NET - Creates an instance of several families of classes.
• Builder in VB.NET - Separates object construction from its representation.
• Factory Method in VB.NET - Creates an instance of several derived classes.
• Prototype in VB.NET - A fully initialized instance to be copied or cloned.
• Singleton in VB.NET - A class of which only a single instance can exist.

• Adapter in VB.NET - Match interfaces of different classes
• Bridge in VB.NET - Separates an object’s interface from its implementation
• Composite in VB.NET - A tree structure of simple and composite objects
• Decorator in VB.NET - Add responsibilities to objects dynamically
• Facade in VB.NET - A single class that represents an entire subsystem
• Flyweight in VB.NET - A fine-grained instance used for efficient sharing
• Proxy in VB.NET - An object representing another object

• Chain of Resp. in VB.NET - A way of passing a request between a chain of objects
• Command in VB.NET - Encapsulate a command request as an object
• Interpreter in VB.NET - A way to include language elements in a program
• Iterator in VB.NET - Sequentially access the elements of a collection
• Mediator in VB.NET - Defines simplified communication between classes
• Memento in VB.NET - Capture and restore an object's internal state
• Observer in VB.NET - A way of notifying change to a number of classes
• State in VB.NET - Alter an object's behavior when its state changes
• Strategy in VB.NET - Encapsulates an algorithm inside a class
• Template Method in VB.NET - Defer the exact steps of an algorithm to a subclass
• Visitor in VB.NET - Defines a new operation to a class without change

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