Bouwkundige Informatiesystemen ADMS 2006 UML part 2

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Bouwkundige InformatiesystemenADMS 2006UML part
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Jan Dijkstra - 16 oktober 2006
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Subjects

• Objects Classes 16 okt.
• UML Class Diagram 23 okt.
• UML Object Diagram 23 okt.
• UML Class Diagrams Exercises 23 okt.
• Exercise Class Diagram MKW 23 okt.
• Discussion Exercise Class Diagram MKW 30 okt.
• UML Class Diagrams - Advanced Concepts 30 okt.
• Task UML-part 2 30 okt.

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Objects Classes
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Analyses and design of a system

• Process orientation
• processes, activities, functions
• How?
• Data orientation
• data, entities, objects
• What?

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Data aspect

• Structure of information
• Which are the static objects?
• What are the classes of objects? How did they
  differ?
• What are the relationships between them?
• Information modeling

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Basic concept of information modeling

• An information system has to represent
  information about objects (entities) that occurs
  in the UoD (Universe of Discourse) associated
  with its application domain.

Design domain model ? modeling approach Design
IS model ? data model
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Basics data model

• Data models in IS development
• Problem domain UoD
• Store information
• Present information
• Manipulate information

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Data model concepts

• Objects are
• Physical (tangible) like students, or
• Conceptual (intangible) like name
• things in the real world
• Objects have properties
• Property of object attribute value
• Link connection between objects
• Multiple objects are identifiable by a unique
  identity

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File card of Student
Name Stud van TUE 24 March 1980 M / F
Address Terborg 7, 2745 XY Gieten Tel 06
23840692
Date Finished Courses 21/02/2002 7m063 24/03/20
05 7m822
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Objects and links 1

• We can not store real-world objects only
  information about them
• Information objects represent the corresponding
  real-world object
• The properties of an object are represented by
  the attributes of the corresponding information
  objects
• At any time an (information) object has a certain
  state consisting of the current values of its
  attributes
• The state of an object can be depicted by means
  of an object diagram

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Objects diagram
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Objects diagram
Students with identification numbers
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Objects and links 2
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Classes

• A class is an abstract concept
• Each object is an instance of a class
• A class has attributes with no values
• Classes classify objects
• Object analysis ? than values to attributes

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Class diagram

• Object diagrams reveal both the structure and the
  state of objects
• In an information model, we are interested in the
  structure of objects and not specific in their
  state
• Classes of objects and their relationships with
  each other are described in a class diagram

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Class diagram 2
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Question ?

• Describe the class Rectangle
• and describe an instance of this class

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Class and relations
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Object class and their data types
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Exercise

• Een aantal projectteamleden maakt deel uit van
  een uitvoerend comité.
• Eén van de projectteamleden is voorzitter van
  dit uitvoerend comité.
• Tevens is één van de projectteamleden mentor van
  een aantal andere projectteamleden.
• Vraag
• geef klassenaanduidingen, rolnamen, en mogelijke
  associatie van bovenstaande beschrijving in een
  diaghram weer.

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Solution
maakt deel uit van
Projectteam lid
Comité
Voorzitter
Mentor
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References

• Sommerville, Ian (2001)
• Software Engineering, 6th edition
• http//www.software-engin.com
• Timothy Lethbridge Robert Laganière (2005)
• Object-Oriented Software Engineering, 2nd edition
• http//www.lloseng.com