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Uml
- 1. An Introduction To UML:Unified Modeling LanguageChris RoederJune 2011
- 2. ModelingUML is a graphical modeling language.Drawing pictures of codeHelps to visualize high-level abstractions and collaborationsLimits detail2 Major classes of diagramsStatic/StructuralDynamic/BehavioralSimplified version discussed here
- 3. HistoryUML: Unified Modelling LanguageRoots in work of “The Three Amigos” form early 90’sGrady Booch: Rational RoseIvar Jacobsen: OOSE at Ericson“yah-cob-son”James Rumbaugh: Object Modelling Technique at GE1.0 out in 1997ISO standard in 20052.0 in 20052.4 in Beta
- 4. Modeling is useful for:A high-level description of the projectIt does not contain code-level detailMakes it easier to see the forest without all the trees in the wayA graphical presentationWorks better with some mindsIt’s about drawing and using the diagramsDoing designNot about having the diagrams for their own sakeNo Shelfware (gets written, sits on the shelf)
- 5. Static/StructuralClass DiagramShows classes and their relationships, both inheritance and compositionObject DiagramShows instantiations of classes, objects, at a specific point in timePackage DiagramDeployment Diagram(Others)
- 6. Dynamic/BehavioralSequence DiagramShows method calls between objects in sequenceUse-Case DiagramDescribes activities in terms of actors, goals and dependenciesActivity Diagram(others)
- 7. Class DiagramA class is a box and three sections:NameMembersMethodsThree kinds of arrows radiate out:Inheritance: an arrow that points to the base classAggregation: a line starting with a hollow diamond that ends at the contained class: weak, catalog containmentComposition: a line starting with a filled diamond that ends at the contained class: stronger, includes lifecycle, physical containment
- 8. Aggregation and ContainmentAggregationWeakCatalog ContainmentList<Item>Items’ lifetime may be independent of catalogCompositionStrongA Car’s engine, tires, doorsLifetime’s are related: No car, no engine
- 10. MultiplicityAdd quantifiers to ends of aggregation and composition relationships0..1 – optional1 – must have one0..* - zero or more instances1..* - at least one instanceQuantifiers can go on either or both ends of a relationship
- 11. VisibilityCharacters used to show visibility+ public- private# protected~ package_ static
- 12. Role NamesCan add role names to relationshipsdifferent name depending on perspective:A is B’s parent, B is A’s childA is B’s employer, B is A’s employee
- 13. Sequence DiagramShows the interaction between objectsObjects are listed across the top in a single rowInteractions are labelled arrows between lines extending down from the objectsVery useful for mapping out an interaction when learning or debugging a new codebase.Objects are instances of Classes in your Class DiagramEditor picks up methods from the Class DiagramClasses can be used in parameters and return types
- 16. ExamplesCCP UIMA type systemCCP fileparsersprojectEntityTaggers from Code ReviewCCP NLP ShimsUsed to reverse engineer