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Introduction to Design Patterns Raju Golla …………………………………… .…….
What are Design Patterns ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Activity
What they are not? ,[object Object],[object Object]
History ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Classifications ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Singleton pattern ,[object Object],[object Object],[object Object],[object Object],[object Object]
Singleton implementation classic
Thread safe
Outcome ,[object Object],[object Object],[object Object],[object Object]
Strategy ,[object Object],[object Object],[object Object],[object Object]
Strategy – when to be used? ,[object Object],[object Object],[object Object]
Strategy implementation ,[object Object],[object Object]
Implementation continued.. Client
Decorator ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
When to consider? ,[object Object],[object Object],[object Object]
Implementation ,[object Object],[object Object],[object Object]
Implementation continued… ,[object Object],Output
Decorator class
Implementation continued… ,[object Object]
Implementation continued… ,[object Object],Output
Implementation continued…
Continued… Client
State ,[object Object],[object Object],[object Object],[object Object],[object Object]
Example ,[object Object]
State – class diagram
Benefits ,[object Object],[object Object],[object Object],[object Object],[object Object]
References ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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Introduction To Design Patterns