Design Patterns Explained : A New Perspective on Object-Oriented Design

by Shalloway, Alan; Trott, James R.

• ISBN13: 9780201715941
• ISBN10: 0201715945
• Edition: 2nd
• Format: Paperback
• Copyright: 2005-01-01
• Publisher: Addison-Wesley Professional

Summary

Design patterns offer proven opportunities for creating flexible, reusable software -- but until now, their complexity has prevented most software professionals from taking full advantage of them. Now, there's a simple, gentle introduction to patterns that helps software practitioners gain the benefits -- without the confusion. Unlike many books on patterns, Design Patterns Explained doesn't assume that its readers already have an in-depth understanding of object-oriented design. Rather, it teaches object-oriented design and patterns together, helping developers gain deeper insights into both topics far more quickly. Shalloway and Trott don't just introduce a laundry list of patterns: they explain why each pattern works, the organizing principles upon which the pattern is based, and above all, how the patterns work together in real world object-oriented designs. For all software developers, programmers, architects, and project managers who want to succeed with patterns.

Author Biography

Alan Shalloway is founder, CEO, and principal consultant of Net Objectives, an object-oriented consulting and training organization.

Table of Contents

Preface	xv
From Object Orientation to Patterns to True Object Orientation	xvi
From Artificial Intellegence to Patterns to True Object Orientation	xxi
A Note About Conventions Used in This Book	xxiv
Feedback	xxv
Acknowledgments	xxvi
PART I An Introduction to Object-Oriented Software Development	1	(42)
The Object-Oriented Paradigm	3	(26)
Overview	3	(1)
Before The Object-Oriented Paradigm: Functional Decomposition	4	(2)
The Problem of Requirements	6	(1)
Dealing with Changes: Using Functional Decomposition	7	(3)
Dealing with Changing Requirements	10	(4)
The Object-Oriented Paradigm	14	(8)
Object-Oriented Programming in Action	22	(2)
Special Object Methods	24	(2)
Summary	26	(3)
The UML---The Unified Modeling Language	29	(14)
Overview	29	(1)
What Is the UML?	29	(2)
Why Use the UML?	31	(1)
The Class Diagram	31	(7)
Interaction Diagrams	38	(2)
Summary	40	(3)
PART II The Limitations of Traditional Object-Oriented Design	43	(26)
A Problem That Cries Out for Flexible Code	45	(12)
Overview	45	(1)
Extracting Information from a CAD/CAM System	45	(1)
Understand the Vocabulary	46	(2)
Describe the Problem	48	(3)
The Essential Challenges and Approaches	51	(4)
Summary	55	(2)
A Standard Object-Oriented Solution	57	(12)
Overview	57	(1)
Solving with Special Cases	57	(8)
Summary	65	(1)
Supplement: C++ Code Examples	66	(3)
PART III Design Patterns	69	(114)
An Introduction to Design Patterns	71	(16)
Overview	71	(1)
Design Patterns Arose from Architecture and Anthropology	72	(5)
Moving from Architectural to Software Design Patterns	77	(3)
Why Study Design Patterns?	80	(4)
Other Advantages to Studying Design Patterns	84	(2)
Summary	86	(1)
The Facade Pattern	87	(8)
Overview	87	(1)
Introducing the Facade Pattern	87	(1)
Learning the Facade Pattern	88	(3)
Field Notes: The Facade Pattern	91	(1)
Relating the Facade Pattern to the CAD/CAM Problem	92	(1)
Summary	93	(2)
The Adapter Pattern	95	(14)
Overview	95	(1)
Introducing the Adapter Pattern	96	(1)
Learning the Adapter Pattern	96	(7)
Field Notes: The Adapter Pattern	103	(3)
Relating the Adapter Pattern to the CAD/CAM Problem	106	(1)
Summary	106	(1)
Supplement: C++ Code Example	107	(2)
Expanding Our Horizons	109	(14)
Overview	109	(1)
Objects: the Traditional View and the New View	110	(2)
Encapsulation: the Traditional View and the New View	112	(3)
Find What Is Varying and Encapsulate It	115	(4)
Commonality/Variability and Abstract Classes	119	(2)
Summary	121	(2)
The Bridge Pattern	123	(40)
Overview	123	(1)
Introducing the Bridge Pattern	123	(2)
Learning the Bridge Pattern: An Example	125	(11)
An Observation About Using Design Patterns	136	(2)
Learning the Bridge Pattern: Deriving It	138	(12)
The Bridge Pattern in Retrospect	150	(1)
Field Notes: Using the Bridge Pattern	150	(5)
Summary	155	(2)
Supplement: C++ Code Examples	157	(6)
The Abstract Factory Pattern	163	(20)
Overview	163	(1)
Introducing the Abstract Factory Pattern	163	(1)
Learning the Abstract Factory Pattern: An Example	164	(7)
Learning the Abstract Factory Pattern: Implementing It	171	(4)
Field Notes: The Abstract Factory Pattern	175	(4)
Relating the Abstract Factory Pattern to the CAD/CAM Problem	179	(1)
Summary	179	(1)
Supplement: C++ Code Examples	180	(3)
PART IV Putting It All Together: Thinking in Patterns	183	(44)
How Do Experts Design?	185	(12)
Overview	185	(1)
Building by Adding Distinctions	185	(9)
Summary	194	(3)
Solving the CAD/CAM Problem with Patterns	197	(20)
Overview	197	(1)
Review of the CAD/CAM Problem	197	(2)
Thinking in Patterns	199	(1)
Thinking in Patterns: Step 1	199	(1)
Thinking in Patterns: Step 2a	200	(6)
Thinking in Patterns: Step 2b	206	(4)
Thinking in Patterns: Step 2c	210	(1)
Thinking in Patterns: Step 2d (FAcade)	210	(2)
Thinking in Patterns: Step 2d (Adapter)	212	(1)
Thinking in Patterns: Step 2d (Abstract Factory)	213	(1)
Thinking in Patterns: Step 3	213	(1)
Comparison with the Previous Solution	214	(1)
Summary	215	(2)
The Principles and Strategies of Design Patterns	217	(10)
Overview	217	(1)
The Open-Closed Principle	218	(1)
The Principle of Designing from Context	218	(5)
The Principle of Containing Variation	223	(1)
Summary	224	(3)
PART V Handling Variations with Design Patterns	227	(76)
The Strategy Pattern	229	(12)
Overview	229	(1)
An Approach to Handling New Requirements	229	(3)
Initial Requirements of the Case Study	232	(1)
Handling New Requirements	233	(4)
The Strategy Pattern	237	(2)
Field Notes: Using the Strategy Pattern	239	(1)
Summary	240	(1)
The Decorator Pattern	241	(14)
Overview	241	(1)
A Little More Detail	241	(2)
The Decorator Pattern	243	(1)
Applying the Decorator Pattern to the Case Study	244	(4)
Another Example: Input/Output	248	(2)
Field Notes: Using the Decorator Pattern	250	(2)
Summary	252	(1)
Supplement: C++ Code Examples	252	(3)
The Singleton Pattern and the Double-Checked Locking Pattern	255	(8)
Overview	255	(1)
Introducing the Singleton Pattern	256	(1)
Applying the Singleton Pattern to the Case Study	256	(2)
A Variant: The Double-Checked Locking Pattern	258	(3)
Field Notes: Using the Singleton and Double-Checked Locking Patterns	261	(1)
Summary	261	(1)
Supplement: C++ Code Examples	262	(1)
The Observer Pattern	263	(16)
Overview	263	(1)
Categories of Patterns	263	(2)
More Requirements for the Case Study	265	(1)
The Observer Pattern	266	(1)
Applying the Observer to the Case Study	267	(7)
Field Notes: Using the Observer Pattern	274	(1)
Summary	275	(1)
Supplement: C++ Code Examples	276	(3)
The Template Method Pattern	279	(6)
Overview	279	(1)
More Requirements for the Case Study	279	(1)
The Template Method Pattern	280	(1)
Applying the Template Method to the Case Study	280	(2)
Field Notes: Using the Template Method Pattern	282	(2)
Summary	284	(1)
The Factory Method Pattern	285	(6)
Overview	285	(1)
More Requirements for the Case Study	285	(2)
The Factory Method Pattern	287	(1)
Field Notes: Using the Factory Method Pattern	287	(2)
Summary	289	(2)
The Analysis Matrix	291	(12)
Overview	291	(1)
In the Real World: Variations	291	(1)
Case Study in Variation: An International E-Tail System	292	(7)
Field Notes	299	(3)
Summary	302	(1)
PART VI Endings and Beginnings	303	(20)
Design Patterns Reviewed from the New Perspective of Object-Oriented Design	305	(8)
Overview	305	(1)
A Summary of Object-Oriented Principles	305	(1)
How Design Patterns Encapsulate Implementations	306	(1)
Commonality/Variability Analysis and Design Patterns	307	(1)
Decomposing a Problem Domain into Responsibilities	308	(1)
Relationships Within a Pattern	309	(1)
Patterns and Contextual Design	310	(1)
Field Notes	311	(1)
Summary	311	(2)
Bibliography	313	(10)
Design Patterns Explained: The Web Site Companion	313	(1)
Recommended Reading on Design Patterns and Object Orientation	314	(2)
Recommended Reading for Java Programmers	316	(1)
Recommended Reading for C++ Programmers	317	(1)
Recommended Reading for COBOL Programmers	317	(1)
Recommended Reading on eXtreme Programming	318	(1)
Recommended Reading on General Programming	318	(1)
Personal Favorites	319	(4)
Index	323