Facade is a structural design pattern that provides a simplified (but limited) interface to a complex system of classes, library or framework.

Participants

The classes and objects participating in this pattern include:

• Facade(MortgageApplication)

  • knows which subsystem classes are responsible for a request.
  • delegates client requests to appropriate subsystem objects.

• Subsystem classes(Bank, Credit, Loan)

  • implement subsystem functionality.
  • handle work assigned by the Facade object.
  • have no knowledge of the facade and keep no reference to it.

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Note: Will add details more shortly.