This is a presentation of EMF from the ground up during Eclipse India Summit, Bangalore July 2009. This was a joint session from me and Annamalai, ANCiT.

1. Chetan Kumar K, RBEI jointly with Annamalai C, ANCiT

2. In-memory dbase content D-Base UI display What is a model ??? That is a model!

4. … and so on Will you spend time writing each class ?? Map design and code (model) PIM PSM Or be smart and generate them ?? UML Java

5. Typical code-generation flow PIM Generator Model Code Generation Engine Code generation templates PSM PSM

7. Code generation flow – EMF way PIM (ecore) Generator Model genmodel EMF Code Generation Engine Code generation Templates (JET) PSM (Java)

8. First look of EMF as a code-generator… Tap along guys…

9. The complete Example UML

10. Properties of (E)Attribute Data type of attribute EType Default value assigned when containing class is instantiated Default value Literal Find out if an attribute was touched Unsettable Value can be changed or not Changeable Attribute isn’t persisted Transient No associated storage (value can be calculated) Volatile Meaning Property

11. M-V-C architecture thru EMF

13. EMF.Edit Control how model elements are displayed, edited.

14. EMF.Edit – bird’s eye view. Contains UI Providers for each Model Element. Content Provider Label Provider Property Source Item Provider Generated implementation for different providers

15. EMF.Edit control flow – Content Providers “ +” clicked Item provider code eGet api calls Generated api getter(s)

16. EMF.Edit control flow – Label Providers Item provider code eGet api calls Generated api getter(s)

17. EMF.Edit control flow – Property Source Tree item selected Item provider code Individual feature’s property descriptor built Property descriptors

19. EMF.Edit commands Command based model editing support

20. EMF.Edit Commands Command based editing of model instances Editing domain UI display “ Set” event as Command Command stack setXXX() undoable Model object

22. EMF.Edit – commands, a deeper look Command interface Existing Command implementations Do you need to implement this interface ??

23. EMF.Edit – “Change… is here!” Should I have one command per operation ? Can I “record” changes done to a model ? Oooo yess!! Works on change notofications given on each operation ChangeRecorder recoreds these notifications from individual setters. Hence, bulk undo is possible  Can I perform many operations in one command ?

25. Model xml / xmi load save UI display What after you edit ?? – can ya persist ?

26. EMF serialization Model object EMF Resource EMF Resource Set xml / xmi

27. Load and save flows Model object xml / xmi load save EMF Reosource Typical code snippet:

29. Can I directly persist EMF Objects into dbase ? Yes, u can – using EMF Teneo ( http:// www.eclipse.org/modeling/emf/?project = teneo ) Create HbDataStore Create Hibernate Session, Transaction Begin Transaction Create EMF Model root object, make it persistent Create sub-tree under persistent root Commit Tx

32. EMF Transaction Thread-safe editing of a single Model Instance Transaction style editing of model instances

33. Model editing through multiple threads Thread 1 Change name : “ Jimmy Bend” Thread 2 Change name “ James Bond” name: Harry Potter name: ??? Model object Model object

34. “ A mind once stretched by a thought never regains its original dimensions”