Presentation on adapter pattern
- 1. Presentation on Adapter Design Pattern Presented by Tanim Ahmed (1507113) Md. Zabirul Islam (1507110) Md. Motaleb Hossen Manik (1507114) 1
- 2. Do you know what is adapter pattern? ▪ The adapter pattern convert the interface of a class into another interface that clients expect. Adapter lets classes work together that couldn’t otherwise because of incompatible interfaces. ▪ Wikipedia says… ▪ In software engineering, the adapter pattern is a software design pattern that allows the interface of an existing class to be used as another interface. It is often used to make existing classes work with others without modifying their source code. 2
- 3. In real life example Consider that you have some pictures in your memory card and you need to transfer them to your computer. In order to transfer them you need some kind of adapter that is compatible with your computer ports so that you can attach memory card to your computer. In this case card reader is an adapter. Another example would be the famous power adapter; a three legged plug can't be connected to a two pronged outlet, it needs to use a power adapter that makes it compatible with the two pronged outlet. Yet another example would be a translator translating words spoken by one person to another 3
- 4. Adapter… 4
- 5. ANOTHER EXAMPLE ▪ Real Life Example of Adapter Pattern: suppose I am a ProgrammingTeacher, and I have two types of students in my class, the American students and the Bangladeshi students, since my American students don’t understand Bangla, i have to have a translator that will translate my lectures to my American students. ▪ In this example, a Student class will be theTarget, the translator will be the Adapter, and the American students will be the Adaptee, like the class diagram below: 5
- 6. Class Diagram Of Adapter Pattern 6 student translator American student
- 7. Context ▪ Context: ▪ You are building an inheritance hierarchy and want to incorporate into it an existing class. ▪ The reused class is also often already part of its own inheritance hierarchy. 7
- 8. Adapter Pattern Problem Continued… ▪ Some problems are faced during designing any system using Adapter design pattern ▪ When there is polymorphism ▪ There may have function with same name but with different signature ▪ User may have written a separate class for a specific task. But as the user should go through Polymorphism, this separate class is unused. 8
- 9. Adapter Pattern Problem Continued… 9 Here is already written class called xyzcircle that deals with circles already. But we can’t use directly because we want to preserve polymorphic behavior with Shape
- 10. Adapter Pattern Forces ▪ Some languages may not support multiple inheritances (e.g. Java) ▪ More forwarding requests ▪ Increase in the overhead ▪ Adapter chaining in created to reach to specific type ▪ Complex adaptation 10
- 11. 11 Adapter Pattern Design example
- 12. 12 Summary ▪ The Adapter Pattern is extremely useful when combined with SOLID design principles and it helps developers to write a cleaner and more maintainable code.
- 13. References ▪ 1. https://www.slideshare.net/adeelr456/adapter-design-pattern- 45257387 ▪ 2.https://www.slideshare.net/adeelr/qid=4ce8b50c-e14a-4cbb-8b62- 82ba26259f22&v=&b=&from_search=2 13
- 14. ThankYou 14