Example: air traffic controller
SOFTWARE ARCHITECTURE AND DESIGN PATTERNS/17IS72 - …

SOFTWARE ARCHITECTURE AND DESIGN PATTERNS/17IS72 - …

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whole hierarchies. • Lets clients treat individual objects and compositions of objects uniformly. Decorator( 175 ) • Attach additional responsibilities to an object dynamically. • Provide a flexible alternative to sub classing for extending functionality. Facade( 185 ) • Provide a unified interface to a set of interfaces in a subsystem.

  Hierarchies

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