Itt1 sd uml and oo
- 1. UML and OO System design 2010 Autumn Morten Bo Nielsen Mon@eal.dk
- 2. UML and OO ● What is UML? ● Who defines it? ● What does “object oriented” mean? ● What is an object? ● What is a class? ● Why use objects? System design - Mon@eal.dk 2
- 3. UML ● UML is all about modelling ● And communicating ideas ● Collection of diagrams ● Functional modelling: Use case diagrams ● Structural modelling: Class diagrams ● Behavioural modelling: State machine, sequence diagrams, communication diagrams. ● A lot more exists example project System design - Mon@eal.dk 3
- 4. Objects and clases ● start here System design - Mon@eal.dk 4
- 5. OOP words ● Class, Object, Instance, Method/Properties, (Message passing), Inheritance, Abstraction, Encapsulation, Decoupling, Polymorphism System design - Mon@eal.dk 5
- 6. Why classes? ● Encapsulation ● Code reuse ● Use standardized patterns ● Abstraction ● Modularisation of the code Note that much of this is possible without OOP System design - Mon@eal.dk 6
- 7. Software example - IP addresses Class Objects IpAddress* IpAddressOfPc1 = new IpAddress( 192.168.1.100, 255.255.255.0 ); IpAddress* IpAddressOfPc2 = new IpAddress( 192.168.1.101, 255.255.255.0 ); System design - Mon@eal.dk 7
- 8. Physical world - Books Class “Book” covers everything we would call a “book” Which to use depends on context Objects 1. Books as defined by ISBN 2. Books as in “every book is unique” My copy is different from yours 8 SD3 - mon@sde.dk 25-10-2009 System design - Mon@eal.dk 8
- 9. Inheritance design problem Book type is most Book content is most impor tant impor tant Book Book System Analysis and Design Paperback Hardcover with UML version 2.0 book book by A. Dennis et al. ISBN: 978-0-471- Paperback Hardcover 65920-4 book book System design - Mon@eal.dk 9
- 10. UML use case diagrams ● User ← admin actors example. System design - Mon@eal.dk 10
- 11. Factory design pattern System design - Mon@eal.dk 11
- 12. Example project ● Mashing temperature control.pdf ● Mashing+temperature+control_prcent_2C+part+2.p System design - Mon@eal.dk 12