Design Patterns Explained

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FilterlnputStream class, 250 flexible code, problem requiring, 45, 57 forces, design pattern, 79 Fowler, Martin, 13, 154 Fowler's perspectives, 13-14, 15-16, 21 frameworks, defining, 287 functional decomposition and code changes, 5, 7-10 defined, 4-5, 26, 27 example of, 4 problems with, 5, 8, 10 functions changing, 9 organizing code around objects instead of, 14 G Gamma, Erich. See Gang of Four Gang of Four and aggregation vs. composition, 32 authors included in, 69 and designing for change, 231 and encapsulation, 115, 140 and new perspective on design patterns, 110 and pattern classification system, 263-265 seminal work on design patterns, 69, 78 and specific design patterns Abstract Factory pattern, 163 Adapter pattern, 96 Bridge pattern, 123 Decorator pattern, 243 Facade pattern, 87 Factory Method pattern, 287 Observer pattern, 265, 266 Singleton pattern, 256 Strategy pattern, 237 Template Method pattern, 280 and strategies for creating good designs, 85 garbage collection, 25-26, 152 Index 329 Gardner, Karen, 77 generalized classes, 114 geometry CAD/CAM, 48 object-oriented, 54 getEdgeType method, 212 get Length method, 213 getLocation method, 213 GoF reference, 79 gut instinct, paying attention to, 65 H has-a relationship, 31, 34-35, 214 Helm, Richard. See Gang of Four hiding data, 1, 20, 112, 113, 140 hierarchies avoiding large, 85, 223 creating parallel, 287 I implementation, decoupling abstraction from, 123-124, 133, 145-146 implementation perspective, 13-14, 16, 110-111, 119 Implementor class, 151 inheritance alternate way of using, 114— 115 avoiding large hierarchies, 85, 223 defined, 21, 27 favoring object composition over, 233, 235 and is-a relationships, 18 overusing, 65, 133-134 input/output, stream, 248-250 InputStream class, 250 instance, 17, 21, 27 instantiation and abstract classes, 19 and Bridge pattern, 152 defined, 17, 27 and Factory Method pattern, 287, 288
33O Index instinct, paying attention to gut, 65 intent, design pattern, 79 Interaction Diagram, 30, 38-40 interface, object's public, 16, 20 Internet retailing. See e-tailing case study is-a relationship, 18, 31, 34, 214 Ishikawa, Sara, 72 Iterator pattern, 299 J Java and Bridge pattern, 150, 152 code examples drawing circles/rectangles, 127, 129-130 implementing CAD/CAM V1 methods, 61 implementing CAD/CAM V2 methods, 62 implementing ResFactory, 172 instantiating CAD/CAM V1 features, 60 instantiating CAD/CAM V2 features, 61-62 using Adapter pattern, 101 using Bridge pattern, 127, 129-130, 147-149 using Decorator pattern, 246-247 using Double-Checked Locking pattern, 261 using Observer pattern, 270-271 using polymorphism to solve problem, 168 using Singleton pattern, 257 using switch to control device driver, 165 and Observer pattern, 272 recommended books on, 316-317 and Singleton pattern, 259 and stream I/O, 250 java.io.InputStream class, 250 Johnson, Ralph, 80. See also Gang of Four K KADS, 77 Knowledge Analysis and <strong>Design</strong> Support, 77 L locking, double-checked, 260 M machine-readable instructions, 48 maintenance, effect of class explosion on, 64, 65 makeDB method, 286 McConnell, Steve, 8 Mediator pattern, 299 member, 27 memory leak, 259 methods defined, 14, 27 defining parameters for, 235 encapsulation of, 114 redundancy among, 63 special types of, 24-26 Meyer, Bertrand, 15, 218 minus sign (-) access notation, 33 model, CAD/CAM, 48 modeling language, 29. See also UML modifiability, code, 85 modularity, containing variation with, 7-8 motivation, object, 112 multithreaded applications, 255, 258-259, 261 N NC machine, 48 NC set, 48, 49, 50, 206 Note symbol, UML, 36 notification, event, 266-267, 268, 274 notify method, 268
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xvi Preface From Object Orientation
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xviii Preface Patterns are supposed
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xx Preface A slight digression. The
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xxii Preface abstractly and because
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xxiv Preface Approach Rationale A N
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xxvi Preface Acknowledgments Almost
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Overview CHAPTER 1 The Object-Orien
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Chapter 1 The Object-Oriented Parad
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Table 1-2 Objects and Their Respons
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The main program would now look lik
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Table 1-4 Object-Oriented Terminolo
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3O Part I • An Introduction to Ob
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32 Part I • An Introduction to Ob
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4O Part I • An Introduction to Ob
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PART II The Limitations of Traditio
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CHAPTER 3 A Problem That Cries Out
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Chapter 3 • A Problem That Cries
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Figure 3-6 Class diagram of my solu
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Summary Chapter 3 • A Problem Tha
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58 Part II • The Limitations of T
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6O Part II • The Limitations of T
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Chapter 4 • A Standard Object-Ori
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Chapter 4 • A Standard Object-Ori
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Example 4-6 C++ Code Fragments: Imp
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Part Overview PART III Design Patte
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Overview CHAPTER 5 An Introduction
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Chapter 5 An Introduction to Design
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Table 5-2 Key Features of Patterns
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Figure 5-2 A miter joint Chapter 5
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Overview CHAPTER 6 The Facade Patte
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This person would determine how I a
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Field Notes: The Facade Pattern Fac
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Summary Chapter 6 • The Facade Pa
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96 Part III • Design Patterns Int
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98 Part III • Design Patterns How
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1OO Part III • Design Patterns /
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1O2 Part III • Design Patterns Th
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1O4 Part III • Design Patterns Co
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1O6 Part III • Design Patterns Ad
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CHAPTER 8 Expanding Our Horizons Ov
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1. Make a preliminary design withou
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Chapter 8 • Expanding Our Horizon
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124 Part III • Design Patterns It
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126 Part III Design Patterns Proper
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128 Part III Design Patterns But, t
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130 Part III Design Patterns Unders
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132 Part III Design Patterns This s
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134 Part III Design Patterns An alt
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136 Part III Design Patterns It sti
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138 Part III Design Patterns Learni
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140 Part III Design Patterns Strate
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142 Part III Design Patterns Tying
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144 Part III Design Patterns One ru
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146 Part III Design Patterns From a
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148 Part III Design Patterns Exampl
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150 Part III Design Patterns The es
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152 Part III Design Patterns Compou
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154 Part III Design Patterns A usef
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156 Part III Design Patterns Concep
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CHAPTER 10 The Abstract Factory Pat
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Chapter 1O • The Abstract Factory
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Figure 1O-5 The ResFactory encapsul
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Figure 1O-6 Intermediate solution u
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In this pattern, Chapter 1O • The
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CHAPTER 11 How Do Experts Design? O
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Design is often thought of as a pro
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Design is often thought of as a pro
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It is only possible to make a place
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that it shared its patterns with ot
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Alexander's Steps Discussion Identi
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Chapter 11 • How Do Experts Desig
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198 Part IV • Putting It All Toge
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2OO Part IV • Putting It All Toge
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2O2 Part IV • Putting It All Toge
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2O4 Part IV • Putting It AM Toget
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Chapter 12 • Solving the CAD/CAM
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CHAPTER 13 The Principles and Strat
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Chapter 13 • The Principles and S
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228 Part V • Handling Variations
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23O Part V • Handling Variations
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Overview CHAPTER 18 The Template Me
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Chapter 18 • The Template Method
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Intent Problem Solution Participant
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CHAPTER 19 The Factory Method Patte
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The Factory Method Pattern Chapter
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Summary Chapter 19 • The Factory
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Figure 2O-1 Using Strategy patterns
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Page 312 and 313: CHAPTER 22 Bibliography This book h
Page 314 and 315: • Meyer, B., Object-Oriented Soft
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Page 318 and 319: Personal Favorites It is my belief
Page 320 and 321: Spradely, J. P., The Ethnographic I
Page 322 and 323: Section Overview Section 3: Design
Page 324 and 325: How do we get good quality repeated
Page 326 and 327: Or again, people are creatures of h
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Page 334 and 335: Design Pattern Matrix Design Patter
Page 336 and 337: Design Pattern Matrix How it is imp
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Page 348 and 349: usiness rules defining, 238 encapsu
Page 350 and 351: decompression object, 249 decorator
Page 354 and 355: notifyObservers method, 272 NULL te
Page 356 and 357: sales-order architecture, e-tail sy
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