uml diagrams

1. UNIT I UML DIAGRAMS
Introduction to OOAD – Unified Process –
UML diagrams – Use Case – Class Diagrams–
Interaction Diagrams – State Diagrams –
Activity Diagrams –
Package, component and Deployment Diagrams.

2. UML Diagrams
Designed to view a software system
from a different perspective and
in varying degrees of abstraction

3. • UML – Unified modeling language
• UML is a visual language for specifying,constructing and documenting
artifacts of the system.
• Three ways to apply UML:
1.UML as sketch
2.UML as blue print
3.UML as programming language

4.
• Three perspectives:
1.Conceptual – interpret things in situation of the real world
2.Specification – software abstracted components
3.Implementation – S/W implementations of particular technology like java

5. Categories of UML Diagrams
• Structure diagrams
– Show the static structure of the system
– Show the things in a system being modeled.
– In a more technical term, they show different objects in a system.
• Behavioral diagrams
– Show the dynamic behavior of the objects in a system
– Shows what should happen in a system.
– They describe how the objects interact with each other to create a
functioning system.

7. UML Structural Diagrams
• Class Diagram
– Shows a collection of static model elements such as classes and types, their contents,
and their relationships.
• Object diagram
– Depicts objects and their relationships at a point in time, typically a special case of either
a class diagram or a communication diagram.
• Package Diagram
– Shows how model elements are organized into packages and dependencies b/w
packages
• Composite Structure Diagram
– Depicts the internal structure of a classifier (such as a class, component, or use case),
including the interaction points of the classifier to other parts of the system

8. UML Structural Diagrams
Physical Diagrams
• Component Diagram
– Depicts the components that compose an application, system, or enterprise.
– Components, their interrelationships, interactions, and their public interfaces are depicted.
• Deployment diagram
– Shows the execution architecture of systems.
– This includes nodes, either hardware or software execution environments, and the
middleware connecting them.

9. UML Behavioral Diagrams
• State Diagram
– Represents different states that objects in the system undergo during their life cycle.
• Activity Diagram
– Displays a special state diagram where most of the states are action states and most of
the transitions are triggered by completion of the actions in the source states
– Focuses on flows driven by internal processing
• Use Case Diagram - Describes “HOW” the system works.
– Displays the relationship among actors and use cases
– Identifies the primary elements and processes that form the system.
• Interaction Overview Diagram
– A variant of an activity diagram which overviews the control flow within a system or
business process.
– Each node/activity within the diagram can represent another interaction diagram

10. UML Behavioral Diagrams
Interaction Diagrams
• Sequence diagram
– Displays the time sequence of the objects participating in the interaction
– This consists of the vertical dimension (time) and horizontal dimension (different objects)
• Collaboration diagram (Communication Diagram)
– Displays an interaction organized around the objects and their links to one another
– Numbers are used to show the sequence of messages