phân tích va thiết kế phần mềmdesign patterns part1 sinhvienzone com

om C ne nh Vi en Zo Design Patterns Si nlhdung@fit.hcmus.edu.vn SinhVienZone.com https://fb.com/sinhvienzonevn om What Are Design Patterns? Si nh Vi en Zo ne C • Solutions to common problems • Targets of refactoring, not design • Powerful, flexible, reusable SinhVienZone.com https://fb.com/sinhvienzonevn om C ne Si nh Vi en Zo Pattern Types SinhVienZone.com https://fb.com/sinhvienzonevn ne Si nh Vi en objects and instances Zo Concerned with the creation of C om Creational Patterns SinhVienZone.com https://fb.com/sinhvienzonevn Si nh Vi en Zo ne C om Structural Patterns SinhVienZone.com Concerned with the overall design of the system and its constituent classes and objects https://fb.com/sinhvienzonevn ne nh Vi en of responsibilities to objects and Zo Concerned with the assignment C om Behavioral Patterns Si classes SinhVienZone.com https://fb.com/sinhvienzonevn .C om Style for Describing Patterns Si nh Vi en Zo ne • We will use this structure: • Pattern name • Purpose: what problem the pattern addresses and the general approach of the pattern • UML for the pattern • Participants: a description as a class diagram • Use Example(s): examples of this pattern, in C# and other SinhVienZone.com https://fb.com/sinhvienzonevn om C ne Si nh Vi en Zo Singleton SinhVienZone.com https://fb.com/sinhvienzonevn .C om Singleton - Purpose Si nh Vi en Zo ne • This pa(ern ensures that a class has only one instance and provides a global point of access to it • Exactly one instance of a class is required • Controlled access to a single object is necessary SinhVienZone.com https://fb.com/sinhvienzonevn Si nh Vi en Zo ne C om Singleton - UML SinhVienZone.com https://fb.com/sinhvienzonevn Si nh Vi en Zo ne C om Composite – Sample SinhVienZone.com https://fb.com/sinhvienzonevn om Composite – Sample Si nh Vi en Zo ne C • Project’s source code… SinhVienZone.com https://fb.com/sinhvienzonevn Si nh Vi en Zo ne C om Composite – Sample SinhVienZone.com https://fb.com/sinhvienzonevn om C ne Si nh Vi en Zo Prototype SinhVienZone.com https://fb.com/sinhvienzonevn .C om Prototype - Purpose Si nh Vi en Zo ne • Create objects by cloning a prototypical instance • Consumes less resources than creating new objects SinhVienZone.com https://fb.com/sinhvienzonevn Si nh Vi en Zo ne C om Prototype – UML SinhVienZone.com https://fb.com/sinhvienzonevn Si nh Vi en Zo ne C om Prototype – Sample SinhVienZone.com https://fb.com/sinhvienzonevn om Prototype – Sample Si nh Vi en Zo ne C • Project’s source code… SinhVienZone.com https://fb.com/sinhvienzonevn om C ne Si nh Vi en Zo Template SinhVienZone.com https://fb.com/sinhvienzonevn .C om Template - Purpose Si nh Vi en Zo ne • This pattern is used to define the basic steps of an algorithm/task and allow the implementation of the individual steps to be changed SinhVienZone.com https://fb.com/sinhvienzonevn Si nh Vi en Zo ne C om Template – UML SinhVienZone.com https://fb.com/sinhvienzonevn Si nh Vi en Zo ne C om Template – Sample SinhVienZone.com https://fb.com/sinhvienzonevn om Prototype – Sample Si nh Vi en Zo ne C • Project’s source code… SinhVienZone.com https://fb.com/sinhvienzonevn om C ne Si nh Vi en Zo Questions? SinhVienZone.com https://fb.com/sinhvienzonevn om Thanks! Si nh Vi en Zo ne C Reference: • Erich Gamma, John Vlissides, Ralph Johnson, and Richard Helm, “Design Patterns: Elements of Reusable Object-Oriented Software”, 1994 • Bert Bates, Kathy Sierra, Eric Freeman, Elisabeth Robson, “Head First Design Patterns”, 2009 SinhVienZone.com https://fb.com/sinhvienzonevn ... way SinhVienZone. com https://fb .com/ sinhvienzonevn Si nh Vi en Zo ne C om Composite – UML SinhVienZone. com https://fb .com/ sinhvienzonevn Si nh Vi en Zo ne C om Composite – UML (2) SinhVienZone. com. .. SinhVienZone. com https://fb .com/ sinhvienzonevn Si nh Vi en Zo ne C om Composite – Sample SinhVienZone. com https://fb .com/ sinhvienzonevn om C ne Si nh Vi en Zo Prototype SinhVienZone. com https://fb .com/ sinhvienzonevn... SinhVienZone. com https://fb .com/ sinhvienzonevn Si nh Vi en Zo ne C om Composite – Sample SinhVienZone. com https://fb .com/ sinhvienzonevn om Composite – Sample Si nh Vi en Zo ne C • Project’s source code… SinhVienZone. com