This presentation is part of the Design Pattern Series. Presentation explains the use of Abstract Factory Pattern comparing it against a real life situation and then showcasing the Java implementation of the same.

1. QmPe
initiative
ABSTRACT FACTORY PATTERN explained !
Prepared by Annamalai C
Copyright 2006-2011

2. Abstract Factory Pattern in Real Life
Abstract Factory Pattern is similar to Sub Contracting in real world.
Basically delegating the creation of Objects to expert Factories
-----------------------------------
Orders in a restaurant are received by a Kitchen.
Then are assigned to Special Chefs like
Chinese, Indian, Continental.
Abstract Factory Pattern is a Creational Pattern.
Similar to Factory Pattern it is Object Creation without exposing “HOW” ?
Copyright 2006-2011

3. Abstract Factory Pattern in Java
Copyright 2006-2011

4. Real Life vs Java Object
Factory
Kitchen
Copyright 2006-2011

5. Real Life vs Java Object
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6. How Factory Pattern works in Real Life ?
1 Orders a Dish from Menu
Receives the Order
2 Creates the Dish
3 Outsources to Chef
4 Delivers the Dish
Copyright 2006-2011

7. How Factory Pattern works in Java ?
public Food getFood(String name) {
if (name.equals("Dosa")) {
IndianFactory factory = new IndianFactory();
1 return factory.getFood(name);
} else if (name.equals("Noodles")) {
ChineseFactory factory = new
ChineseFactory();
return factory.getFood(name);
}
KitchenFactory factory = new KitchenFactory(); Return null;}
Food dosa = factory.getFood("Dosa"); 2
dosa.print();
Create food from Respective Factory Class
Food noodles = factory.getFood("Noodles");
noodles.print();
3
Food
4
Dosa Noodles
Copyright 2006-2011

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QmPe
initiative
Copyright 2006-2011