emf.edit: a story of adapters
DESCRIPTION
Slides from my talk at Eclipse Con North America 2014 (https://www.eclipsecon.org/na2014/session/emfedit-story-adapters) So you need to build a Java application for desktop, mobile or web? You already know that EMF could be helpful in many ways because it handles the burden of writing the data classes (entities) and provides RESTful serialization of those data? Yeah, that is perfectly correct. But how does it help you with changing, or editing, your data? What is the point behind the so-called EMF.Edit framework? During this talk, you will learn how to build the foundations for a rich client application in any widget toolkit (SWT, JavaFX...). Among other things you will learn how to customize the generated EMF editor without messing up with the generated classes. You will learn how the content and label providers are working under the hood to help create your own beautiful, robust and maintainable applications. By the end of this talk you will finally untangle the gordian knot between Adapters, ItemProvider, AdapterFactory, ItemProviderAdapterFactory, AdapterFactoryLabelProvider, AdapterFactoryContentProvider, etc. This talk is dedicated to EMF rookies who know EMF as a generator of JavaBeans on Steroids and want to know more about the steroids themselves (the Adapter framework, the ItemProvider framework and the amazing helper classes around those two). This talk will be full of sample code and demo. All of this material is available on Github https://github.com/mbarbero/econ-na-2014-emf-edit.TRANSCRIPT
EMF.EditA Story of Adapters
Mikaël BarberoObeo
Eclipse Con North America 2014March 20, 2014
© John W
ilhelm http://500px.com
/photo/59208448
Today’s Workout Routine
Connecting the Viewer
Changing the Labels
Changing the Content
Connecting the viewers
Exercise 1
Model View
Controller
Listening for Reacting to
CHANGES
notifies
adapts
Notifier Adapter
Listener pattern Notifier is the observable and Adapter is the observer
5
Notification Message from the Observable to the Observer
TreeViewer
Chain of notifications Explains the importance of calling dispose()
Adapter Factory Content
& Label Provider
Item Provider Adapter Factory
Item ProviderEObject
Update or Refresh Or how to be smart when notifying the viewer
TreeViewerAdapter
Factory Content & Label Provider
Item Provider Adapter Factory
Item ProviderEObject
#notifyChanged
Update or Refresh Or how to be smart when notifying the viewer
Provider type Singleton
Book Item
Provider
Book
Book Book
Provider type Stateful
Book Item
ProviderBook
Book
Book
Book Item
Provider
Book Item
Provider
TreeViewer
Composed Adapter Factory Look for the proper adapter factory for each type of object
Item Provider Adapter Factory
Item Provider Adapter Factory
Item Provider Adapter Factory
Adapter Factory Content
& Label Provider
Item Provider Adapter Factory
Item ProviderEObject
Code is Available
https://github.com/mbarbero/econ-na-2014-emf-edit
Tags demo1 and demo2
Changing the Labels
Exercise 2
XXXItemProvider#getText(Object) Easy
src
src-gen
Generation gap pattern Treat generated code as byte code
Item
Book Periodical BookOnTape
Video Cassette
TreeViewerAdapter
Factory Content & Label Provider
Item Provider Adapter Factory
Item ProviderEObject
Decorators of AdapterFactory and ItemProvider
TreeViewer
Decorators of AdapterFactory and ItemProvider
ItemAdapter
Factory Content & Label Provider
Item Provider Adapter Factory
ItemItem ProviderEObject
Code is Available
https://github.com/mbarbero/econ-na-2014-emf-edit
Tag demo3
Changing the Contents
Exercise 3
XXXItemProvider#getChildren(Object) Easy
TreeNode
Tree Model Wrap EObjects
EObjectdata
TreeViewer
Tree Model Wrap EObjects
ItemAdapter
Factory Content & Label Provider
Item Provider Adapter Factory
Item ItemItem ProviderEObject
Beware of too many notifications Make your item providers stateful
EObjectEObject
EObject
Beware of too many notifications Make your item providers stateful
Tree Node
Tree Node
Tree Node
Beware of too many notifications Make your item providers stateful
Tree NodeItem Provider
Tree NodeItem Provider
Tree NodeItem Provider
Beware of too many notifications Make your item providers stateful
EObject ItemProvider
Beware of too many notifications Make your item providers stateful
EObject ItemProvider
Beware of too many notifications Make your item providers stateful
Code is Available
https://github.com/mbarbero/econ-na-2014-emf-edit
Tag demo4
Connecting the Viewer
Changing the Labels
Changing the Content
Recap
Q & A
