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Creational Patterns - Builder
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Chris Bushell
December 03, 2008
Programming
1
62
Creational Patterns - Builder
Prepared for the Melbourne Patters Group
Chris Bushell
December 03, 2008
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Transcript
Crea%onal Pa+erns -‐ Builder Melbourne Pa+erns Group Dec 3
2008 Chris Bushell
Intent “Separate the construc%on of a complex object
from its representa%on so that the same construc%on process can create different representa%ons”
Applicability • Separate representa%on of an object from its
construc%on • Construc%on of object follows a definable algorithm • Different objects can be created following the same algorithm
Example • Build vehicle – Build engine – Build
chassis – A+ach engine to chassis – Build wheels – A+ach wheels to chassis Road car, F1 car, Airplane, ForkliQ truck etc.
Par%cipants
Code
Builder Vs. Abstract Factory • Builder
– Focus on process of crea%ng product by following an algorithm – Product is return as final step • Abstract Factory – Focus on building families of object