PPT-Decorator Pattern & Java I/O

Yoshi Why decorator Once you know the techniques of decorating youll be able to give your or someone elses objects new responsibilities without making any code changes to the underlying classes. Decorators provide a flexible alternativ e to subclassing for extending functionality Toni Sellars Universitat de Girona Welcome to Starbuzz Coffee Because Starbuzz Coffee have grown so quickly they are scrambling to update their ordering system to Pattern. flyweight Pattern. Matt Klein. Decorator Pattern. Intent. Attach Additional responsibilities to an object by dynamically. Decorators provide a flexible alternative to subclassing for extending functionality.. Implementing Decorators. CSC 313 – Advanced Programming Topics. Decorator Pattern Intent. Invisibly. . augment main concept instances. Turn . coffee. into a . double mocha with whip. Make . $2. sandwich . J Paul Gibson. TSP. : . Software Engineering. CSC7322/. DesignPatterns. .. 1. CSC 7322 : Object . Oriented. . Development. J . Paul. Gibson, A207. paul.gibson@int-edu.eu. http://www-public.. it-sudparis.eu. Implementing Decorators. CSC 313 – Advanced Programming Topics. Decorator Pattern Intent. Invisibly. . augment main concept instances. Turn . coffee. into a . double mocha with whip. Make . $2. sandwich . Phillip Shin. Overview. Problem. Solution. Example. Key points. Problem. Want to add responsibilities to individual objects, not entire class. Inheritance is inflexible. Would have to create class for every different combination of functionality. Yoshi. Why decorator?. Once you know the techniques of decorating, you’ll be able to give your (or someone else’s) objects new responsibilities . without making any code changes to the underlying classes.. . L. eader. ：. Jiankang. Gong. Member. Interfaces and Encapsulation, Continued. Kirk Scott. Corbel. From Wikipedia, the free . encyclopedia. Jump to: . navigation. , . search. . For other uses, see . Corbel (disambiguation. ). .. In . architecture. There are times when the use of subclasses to modify the behavior of individual objects is problematic.. Chapter 4 – Page . 83. When objects are alike in some fundamental way, but might have a variety of distinctive details, the Decorator Pattern avoids the complexity of having a large number of derived classes.. Can you say “composition” and “delegation”? . Again???. 2. Decorator Pattern - Problem. Want to allow . adding new behaviors . to an object . without modifying. class. Coffee condiments example is great. There are times when the use of subclasses to modify the behavior of individual objects is problematic.. Chapter 4 – Page . 83. When objects are alike in some fundamental way, but might have a variety of distinctive details, the Decorator Pattern avoids the complexity of having a large number of derived classes.. Pattern Overview. The Decorator pattern provides a flexible alternative to . subclassing. by attaching additional responsibilities to an object dynamically, by using an instance of a subclass of the original class that delegates operations to the original . Matt Klein. Decorator Pattern. Intent. Attach Additional responsibilities to an object by dynamically. Decorators provide a flexible alternative to subclassing for extending functionality.. AKA. Wrapper.