October 2004
Beginner
480 pages
8h 43m
English
book
Design Patterns Explained: A New Perspective on Object-Oriented Design, Second Edition
by Alan Shalloway, James R. Trott
Content preview from Design Patterns Explained: A New Perspective on Object-Oriented Design, Second Edition
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Chapter 20. Lessons from Design Patterns: Factories
Overview
This chapter discusses the use of factories—objects that make other objects. Although factories are presented in the Gang of Four book, their use in design is not discussed fully.
This chapter
• Discusses why the use of factories can greatly simplify your design and code.
• Explains the proper steps of seeing first what your objects are and then deciding how to create and/or manage them.
Factories
Usually, when I am designing objects, I am concerned with their behavior: what the objects do and how other objects tell them to do it. But I also need to be concerned about figuring out when a ...