Design Patterns:Elements of Rousable Object-Orientod Software 4 structural patterns 155 ......................................................... Bridge。,。,,,。。。。,171 Comp0site.,....,.,.,..,,.,.,..,.,.,,,.,...。,..,.................183 Facade. 208 eight 218 233 Discussion of structural Patterns.................................246 5 Behavioral Patterna 249 chain of Responsibility........................................... Command.............................................63 Interpreter.......................................................274 t江at0江.289 ..................... 305 16 ObBCEVOE..........................................................326 State。。338 Strategy,,349 Template Method............................................ .360 visitor........ 366 Discussion of Behavioral Patterns................................. 382 6conclugion...................................................... 388 6.1 What to Expect from Design Patterns................... 388 6.2 A Brief Hstoy… 39 6.3 The Pattern community........................................393 6.4 An Invitation.,...,....:.............395 6.5 A Parting Thought...............................................396 aG10aay 397 B Gudde to Notation ................................................ B.1 class Diagram....................................................404 B.2 object Diagram.................................................406 B.3 Interaction Diagram. .....407 c Foundation classes................................409 C.2 Iterator........................................................412 C.3 ListIterator..................................................413Design Patterns: Elements of Reusable Object-Oriented Software 3 4 Structural Patterns .............................................. 155 Adapter ........................................................... 157 Bridge ............................................................ 171 Composite ......................................................... 183 Decorator ......................................................... 196 Façade ............................................................ 208 Flyweight ......................................................... 218 Proxy ............................................................. 233 Discussion of Structural Patterns ................................. 246 5 Behavioral Patterns .............................................. 249 Chain of Responsibility ........................................... 251 Command ........................................................... 263 Interpreter ....................................................... 274 Iterator .......................................................... 289 Mediator .......................................................... 305 Memento ........................................................... 316 Observer .......................................................... 326 State ............................................................. 338 Strategy .......................................................... 349 Template Method ................................................... 360 Visitor ........................................................... 366 Discussion of Behavioral Patterns ................................. 382 6 Conclusion ....................................................... 388 6.1 What to Expect from Design Patterns ........................... 388 6.2 A Brief History ............................................... 392 6.3 The Pattern Community ......................................... 393 6.4 An Invitation ................................................. 395 6.5 A Parting Thought ............................................. 396 A Glossary ......................................................... 397 B Guide to Notation ................................................ 404 B.1 Class Diagram ................................................. 404 B.2 Object Diagram ................................................ 406 B.3 Interaction Diagram ........................................... 407 C Foundation Classes ............................................... 409 C.1 List .......................................................... 409 C.2 Iterator ...................................................... 412 C.3 ListIterator .................................................. 413