Design patterns explained a new perspective on object-oriented design

Cover......Page 1
Contents......Page 10
Preface......Page 20
From Object Orientation to Patterns to True Object Orientation......Page 22
From Artificial Intelligence to Patterns to True Object Orientation......Page 29
A Note About Conventions Used in This Book......Page 31
New in the Second Edition......Page 35
Acknowledgments......Page 36
PART I: An Introduction to Object-Oriented Software Development......Page 40
  Overview......Page 42
  Before the Object-Oriented Paradigm: Functional Decomposition......Page 43
  The Problem of Requirements......Page 45
  Dealing with Changes: Using Functional Decomposition......Page 47
  Dealing with Changing Requirements......Page 50
  The Object-Oriented Paradigm......Page 54
  Object-Oriented Programming in Action......Page 62
  Special Object Methods......Page 66
  Summary......Page 67
  Review Questions......Page 69
  What Is the UML?......Page 72
  Why Use the UML?......Page 73
  The Class Diagram......Page 74
  Interaction Diagrams......Page 81
  Review Questions......Page 84
PART II: The Limitations of Traditional Object-Oriented Design......Page 86
  Extracting Information from a CAD/CAM System......Page 88
  Understand the Vocabulary......Page 89
  Describe the Problem......Page 91
  The Essential Challenges and Approaches......Page 94
  Summary......Page 97
  Review Questions......Page 98
  Solving with Special Cases......Page 100
  Summary......Page 109
  Review Questions......Page 110
PART III: Design Patterns......Page 112
  Overview......Page 114
  Design Patterns Arose from Architecture and Anthropology......Page 115
  Moving from Architectural to Software Design Patterns......Page 120
  Why Study Design Patterns?......Page 122
  Other Advantages of Studying Design Patterns......Page 127
  Review Questions......Page 129
  Introducing the Facade Pattern......Page 132
  Learning the Facade Pattern......Page 133
  Field Notes: The Facade Pattern......Page 136
  Review Questions......Page 138
  Introducing the Adapter Pattern......Page 140
  Learning the Adapter Pattern......Page 141
  Field Notes: The Adapter Pattern......Page 146
  Relating the Adapter Pattern to the CAD/CAM Problem......Page 150
  Review Questions......Page 151
  Overview......Page 154
  Objects: The Traditional View and the New View......Page 156
  Encapsulation: The Traditional View and the New View......Page 158
  Find What Is Varying and Encapsulate It......Page 162
  Commonality and Variability Analysis and Abstract Classes......Page 166
  The Qualities of Agile Coding......Page 169
  Summary......Page 174
  Review Questions......Page 175
  An Approach to Handling New Requirements......Page 178
  The International E-Commerce System Case Study: Initial Requirements......Page 181
  Handling New Requirements......Page 182
  The Strategy Pattern......Page 191
  Field Notes: Using the Strategy Pattern......Page 193
  Summary......Page 195
  Review Questions......Page 196
  Introducing the Bridge Pattern......Page 198
  Learning the Bridge Pattern: An Example......Page 200
  An Observation About Using Design Patterns......Page 211
  Learning the Bridge Pattern: Deriving It......Page 212
  Field Notes: Using the Bridge Pattern......Page 222
  Summary......Page 227
  Review Questions......Page 230
  Introducing the Abstract Factory Pattern......Page 232
  Learning the Abstract Factory Pattern: An Example......Page 233
  Learning the Abstract Factory Pattern: Implementing It......Page 241
  Field Notes: The Abstract Factory Pattern......Page 246
  Summary......Page 250
  Review Questions......Page 251
PART IV: Putting It All Together: Thinking in Patterns......Page 254
  Building by Adding Distinctions......Page 256
  Review Questions......Page 265
  Review of the CAD/CAM Problem......Page 268
  Thinking in Patterns......Page 270
  Thinking in Patterns: Step 2a......Page 272
  Thinking in Patterns: Step 2b......Page 278
  Thinking in Patterns: Steps 2a and 2b Repeated (Facade)......Page 283
  Thinking in Patterns: Steps 2a and 2b Repeated (Adapter)......Page 284
  Thinking in Patterns: Step 3......Page 285
  Comparison with the Previous Solution......Page 286
  Summary......Page 288
  Review Questions......Page 289
PART V: Toward a New Paradigm of Design......Page 290
  Overview......Page 292
  The Open-Closed Principle......Page 293
  The Principle of Designing from Context......Page 294
  The Principle of Encapsulating Variation......Page 300
  Abstract Classes vs. Interfaces......Page 301
  The Principle of Healthy Skepticism......Page 303
  Summary......Page 304
  Review Questions......Page 305
  Commonality and Variability Analysis and Application Design......Page 308
  Solving the CAD/CAM Problem with CVA......Page 309
  Review Questions......Page 316
  In the Real World: Variations......Page 318
  The International E-Commerce System Case Study: Handling Variation......Page 319
  Field Notes......Page 330
  Review Questions......Page 333
  A Little More Detail......Page 336
  The Decorator Pattern......Page 339
  Applying the Decorator Pattern to the Case Study......Page 340
  Another Example: Input/Output......Page 344
  Field Notes: Using the Decorator Pattern......Page 346
  The Essence of the Decorator Pattern......Page 348
  Review Questions......Page 349
PART VI: Other Values of Patterns......Page 352
  Categories of Patterns......Page 354
  More Requirements for the International E-Commerce Case Study......Page 356
  Applying the Observer to the Case Study......Page 358
  Field Notes: Using the Observer Pattern......Page 364
  Summary......Page 366
  Review Questions......Page 367
  More Requirements for the International E-Commerce Case Study......Page 370
  The Template Method Pattern......Page 371
  Applying the Template Method to the International E-Commerce Case Study......Page 372
  Using the Template Method Pattern to Reduce Redundancy......Page 373
  Field Notes: Using the Template Method Pattern......Page 379
  Summary......Page 380
  Review Questions......Page 382
PART VII: Factories......Page 384
  Factories......Page 386
  The Universal Context Revisited......Page 388
  Factories Follow Our Guidelines......Page 390
  Limiting the Vectors of Change......Page 392
  Another Way to Think About It......Page 393
  Field Notes......Page 394
  Review Questions......Page 395
  Overview......Page 398
  Introducing the Singleton Pattern......Page 399
  Applying the Singleton Pattern to the Case Study......Page 400
  A Variant: The Double-Checked Locking Pattern......Page 403
  Reflections......Page 406
  Field Notes: Using the Singleton and Double-Checked Locking Patterns......Page 407
  Review Questions......Page 408
  Overview......Page 410
  A Problem Requiring the Management of Objects......Page 411
  Observation: Factories Can Do Much More Than Instantiation......Page 420
  Review Questions......Page 423
  More Requirements for the Case Study......Page 424
  The Factory Method Pattern......Page 425
  Factory Method Pattern and Object-Oriented Languages......Page 426
  Field Notes: Using the Factory Method Pattern......Page 427
  Review Questions......Page 429
  Steps in the Software Process......Page 432
  Scaling Systems......Page 434
PART VIII: Endings and Beginnings......Page 436
  Overview......Page 438
  A Summary of Object-Oriented Principles......Page 439
  Commonality and Variability Analysis and Design Patterns......Page 440
  Decomposing a Problem Domain into Responsibilities......Page 441
  Patterns and Contextual Design......Page 442
  Relationships Within a Pattern......Page 443
  Design Patterns and Agile Coding Practices......Page 444
  Field Notes......Page 445
  Summary......Page 446
  Review Questions......Page 447
 Chapter 26 Bibliography......Page 448
  Recommended Reading......Page 449
  Recommended Reading for Java Programmers......Page 451
  Recommended Reading for C++ Programmers......Page 452
  Recommended Reading on eXtreme Programming......Page 453
  Personal Favorites......Page 454
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