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STRATEGY. Object Behavioral Pattern. You are at the Pub two weeks before Fall Formal and still don’t have a date! All of a sudden a girl who you had a crush on during o-week walks in.

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Strategy

STRATEGY

Object Behavioral Pattern


You are at the Pub two weeks before Fall Formal and still don’t have a date! All of a sudden a girl who you had a crush on during o-week walks in

There are many different ways that you could approach this situation. Each approach requires a different methodology, but achieves the same goal (i.e. you have confronted your crush)


How you doin
How you doin? don’t have a date! All of a sudden a girl who you had a crush on during o-week walks in



Intent of strategy
Intent of Strategy around the room again?

  • Define a family of algorithms, encapsulate each one, and make them interchangeable

  • Strategy provides a common interface for all encapsulated algorithms and allows the algorithm to vary independently of the client


When is strategy used
When is Strategy used? around the room again?

  • When many related classes differ only in their behavior

  • Different variants of an algorithm exist in order to reflect different space/time trade-offs


Structure
Structure around the room again?


Airline ticket reservations
Airline Ticket Reservations around the room again?

  • There are many different ways to obtain an airline ticket. Depending on your utility for time and money, you may be looking for the cheapest flight available or you might want to find the quickest flight to your destination.


Airline ticket reservations1
Airline Ticket Reservations around the room again?


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