SYST39409- Object Oriented Methodologies 1

Week 11Object Oriented Design

Jerry Kotuba

SYST39409- Object Oriented Methodologies 2

Agenda

ICE-08 Take up Schedule Today

Sequence Diagrams - Part I ▪ Interface & Business Logic

Capstone Discussion (last hour)

Jerry Kotuba

Design Models with Their Respective Input Models

3

SYST39409- Object Oriented Methodologies 4Jerry Kotuba

SYST39409- Object Oriented Methodologies 5

ICE-08 Review

Jerry Kotuba

SYST39409- Object Oriented Methodologies 7Jerry Kotuba

SYST39409- Object Oriented Methodologies 8Jerry Kotuba

SYST39409- Object Oriented Methodologies 9Jerry Kotuba

SYST39409- Object Oriented Methodologies 10Jerry Kotuba

Use-Case Controller is responsible for coordinating andsequencing the interactions between the system and its actors, whilepreserving the integrity of the data and the flow defined in the usecase specification.

Three different types of objects usually participatein a use-case realization, each one encapsulating a different kind ofbehaviour.

Widely known and adopted by UML as the stereotypes <<boundary>>, <<entity>> and <<control>>:

• boundary or interface objects are generally used to translate actor's actions tothe system into events in the system, and vice-versa;

• entity objects are used to handle information that outlives usecases and often persistent;

• control objects are used to encapsulate behaviour related to aspecific use case that isn't naturally placed in any of theprevious two types of objects, such as coordination, sequencing,transaction, and control of other objects. Control objects usuallylast only during the execution of one use case.

SYST39409- Object Oriented Methodologies 11Jerry Kotuba

SYST39409- Object Oriented Methodologies 12Jerry Kotuba

SYST39409- Object Oriented Methodologies 13Jerry Kotuba

SYST39409- Object Oriented Methodologies 14Jerry Kotuba

User interface for the Place Order use case.

SYST39409- Object Oriented Methodologies 15Jerry Kotuba

Use Case Realization

Standard Stereotypes Found in Design Models

16

SYST39409- Object Oriented Methodologies 17Jerry Kotuba

Business Logic LayerInterface Layer

SYST39409- Object Oriented Methodologies 18

ICE-09

Jerry Kotuba

SYST39409- Object Oriented Methodologies 19

Next Week

Sequence Diagrams continued…

Jerry Kotuba