Unified Modeling Language (UML) Object Diagram and Interaction Diagrams

Transcription

1 1 / 17 Unified Modeling Language (UML) and Miaoqing Huang University of Arkansas Spring 2010

2 2 / 17 Outline 1 2

3 3 / 17 Outline 1 2

4 4 / 17 A snapshot of the objects in a system at a point in time Object: instance of a class Notation Object name is underlined instance name : class name Both parts of the name are optional StartsAt EndsAt StartsAt EndsAt

5 5 / 17 Outline 1 2

6 6 / 17 UML Diagrams Class Diagram Object Diagram Use Case Diagram Sequence Diagram Communication Diagram

7 Purpose of Static diagram Use case diagrams show the static relationship between actors and use cases Class diagrams show the static relationship between classes or instances A program is a sequence of interactions among objects (i.e., instances of classes) Difficult of find a program only with static diagrams Purpose of sequence diagram Model the high-level interaction between active objects in a system Model the high-level interaction between subsystems 7 / 17

8 Example sd Create new CarMatch Administrator new UI details set Control create sharing :SharingAgreement first:carsharer :Journey loop [i=1..no of car sharers] get car sharer ID get journey ID add journey set sharing set first arranged 8 / 17

9 9 / 17 Notation Frame sd Create new UI Control first:carsharer :Journey CarMatch Administrator new details set create sharing :SharingAgreement loop [i=1..no of car sharers] get car sharer ID get journey ID add journey set sharing set first arranged Sequence diagrams are drawn in frames New in UML 2.0 Time runs vertically Lifelines are arranged horizontally Represent object instances

10 10 / 17 Notation Frame sd Create new UI Control first:carsharer :Journey CarMatch Administrator new details set create sharing :SharingAgreement loop [i=1..no of car sharers] get car sharer ID get journey ID add journey set sharing set first arranged Sequence diagrams are drawn in frames New in UML 2.0 Time runs vertically Lifelines are arranged horizontally Represent object instances

11 11 / 17 Notation Lifeline Participating instances are represented by lifelines Dashed vertical line Rectangle representing an object Syntax Explanation o An object named o o : C An object named o of class C :C An anonymous object of class C

12 Notation Messages and Activation box A message is shown using an arrow going from the sender to the receiver The activation box indicate the active period of the object An object may have more than one active operation at the same time 12 / 17

13 Notation Messages and Activation box A message is shown using an arrow going from the sender to the receiver The activation box indicate the active period of the object An object may have more than one active operation at the same time Different types of messages Synchronous Asynchronous Creation Reply 13 / 17

14 Example with Explicit Reply sd Create new CarMatch Administrator new UI details set Control create sharing :SharingAgreement first:carsharer :Journey loop [i=1..no of car sharers] get car sharer ID get journey ID add journey set sharing set first arranged 14 / 17

15 15 / 17 Notation Combined Fragments A sequence of messages can be combined into a fragment Loop, branches,... sd Create new UI Control first:carsharer :Journey CarMatch Administrator new details set create sharing :SharingAgreement loop [i=1..no of car sharers] get car sharer ID get journey ID add journey set sharing set first arranged

16 Notation Frame: same as sequence diagram Lifeline: almost same as sequence diagram, no dash line Link Use to link interacting objects Message: almost same as sequence diagram Sequence-expression: message Recurrence in sequence-expression sent iteratively: *[iteration-clause] (e.g., *[i:0..journeys.length]) sent depending on some guard condition, e.g., [dataarranged = null] 16 / 17

17 Example sd Spool File to Printer 4: print(name) :WordProcessor :PrintSpooler 1: open(name) 2: write(document) 3: close :PrinterFile 4.1: open(name) 4.2*[while not eof]:readblock 4.3: close 4.4: delete(name) 4.3: print(block) :Printer 17 / 17