Unified Modeling Language (UML)

1
Unified Modeling Language(UML)
2
UML

• UML provides many different types of diagrams
  that can be used to document object-oriented
  designs
• We will focus on just two diagram types
• Class Diagrams
• Sequence Diagrams
• Class Diagrams show all of the classes in the
  system and the relationships between them
  (static)
• Sequence Diagrams show how objects collaborate in
  order to implement the functionality of the
  system (dynamic, runtime)

3
Class Diagrams - Classes
Class Name
- attrName1 type1 attrName2 type2
attrName3 type3
Attributes
- opName1(in param1 type1, out param2 type2)
returntype opName2(inout param3 type3)
opName3() returntype
Operations
- private public protected
Parameter types in, out, inout
4
Class Diagrams - Classes
Order
- number string - dateReceived Date -
customer Customer - lineItems OrderLine
Order(in num string, in received Date, in
cust Customer) Order() GetNumber()
string GetDateReceived() Date GetCustomer()
Customer AddLineItem(in item OrderLine)
GetLineItems() OrderLine GetPrice()
Money Dispatch() Close()
5
Class Diagrams - Associations
A line between two classes represents an
association or relationship between the
classes You can navigate from one class to
another only if there is an arrowhead in that
direction. The triangle represents
inheritance An order belongs to one customer A
customer may have any number of orders An
order may have any number of order
lines An order line belongs to one order An order
line has one product A product may be associated
with any number of order lines A corporate
customer has zero or one employees assigned to
them An employee may be assigned to any number of
corporate customers
6
Class Descriptions
Class Order
Purpose Represents an order placed by a customer
Attributes
- number string The order's unique number
- dateReceived Date The date on which the order
was received
Operations
Order(in num string, in received Date, in
cust Customer) Constructor for the Order
class num the order's unique number received
the date the order was received cust the
customer that made the order returns nothing
7
SequenceDiagrams
8
SequenceDiagrams
9
Web Crawler Designs

• Your web crawler design should include the
  following
• UML Class Diagram
• Class Description for each class
• UML Sequence Diagram
• Acceptable Formats
• RTF
• HTML
• PDF
• Dia Format (Linux drawing program)

10
Dia Demo