OBJECT ORIENTED
SOFTWARE DESIGN (OOSD) USING THE UML
The object oriented paradigm has replaced the structured
programming paradigm in modern software development. The following
table empahsizes the
necessary shift in terminlogy required to upgrade
from structured programming to object oriented software development.
|
Paradigm
|
Abstract Foundation
|
Abstract Representation
|
Software Implementation
|
|
Programming
|
algorithm
|
flowchart; pseudocode
|
program
|
|
O. O. Development
|
1. object architecture
2. operation algorithms |
1. UML class diagrams
2. SAC for algorithms |
O. O. S'ware Architecture
|
OO stands for "object oriented".
UML stands for the Unified Modeling Language, the standard
Object Technology
SAC stands for Structured Algorithm Charts, a structured
programming version of flowcharts
The following is the best, most concise example I can
think of that illustarte all the constructs of object oriented software
design.
UML Class Diagram:
Prototype Architecture for a Geometry Application
|
|
| The diamond headed links between classes represent "has-a"
relationships. |
Limited UML Class Diagram
showing only the distinctive elements for an
Expansion of Geometry Application Architecture
|
 |
The dashed arrow represents
the "uses-a" relationship between classes.
The triangular arrow represents
the "is-a" relationship between classes.
Italics represent
an "abstract" class that can not be made into a real object. |
Complete UML Class Diagram
for the preceding
Expansion of Geometry Application Architecture
|
|
|