[PPT] - Q 1 TDT4250 - Model-driven Development of Information Systems, PowerPoint Presentation

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TDT4250 - Model-driven Development of Information Systems, Autumn 2009

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GMF – Graphical Modeling Framework

Provides a DSL, runtime and tools for building

graphical editors

EMF is used for defining the language concepts Other models cover:

graphical structure and syntax (gmfgraph) editing tools (gmftool) mapping from language concepts to graphical syntax

(gmfmap)

together these implicitly define the generator model (gmfgen)

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Overview of GMF models

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Language concepts

State

name enterAction and exitAction sub-states

Transition

event condition action

ExternalTransition

source and target states

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Graphical syntax

State

node syntactical type rounded rectangle label compartment for

substates

Transition

connection syntactical type line with arrow

between source and target states

label combining event, condition and action

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Graphical state syntax

Syntactical types

State node Substates compartment

Figure

rounded rectangle

label rectangle (invisible) inset to provide target area along edges border layout, with label @ north and compartment @ center

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Graphical transition syntax

Syntactical type

Transition link

Figure

polyline

label polyline decoration @ target

points defining the arrow head shape

1,-1

0,0

1, 1

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Tool palette structure

Tools

Create State tool Create Transition tool

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Mapping from concepts to syntax

Defines

how to traverse the object structure to generate the diagram

and keep it updated when the object structure changes

top-level diagram elements contained elements

what information in the objects go where in the diagram

labels

Lot’s of details are necessary

a complete specification has to be detailed the model has necessary details, while the (generated) code

has irrelevant and unnecessary details

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Mapping from concepts to syntax

Top level elements

state

State

node mapping: State class to state node

label mapping: State name attribute to label figure child reference and compartment mapping: State subStates

reference to compartment

Transition

link mapping: ExternalTransition class to transition connection

Transitions are children of states Transition source/target references to source and target label mapping: Transition event, condition and action attributes

to label, with view and edit pattern (syntax)

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TDT4250 - Model-driven Development of Information Systems, Autumn 2009

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A GMF-based editor in slow motion...

Create project, domain model and edit support

Create Ecore model Generate edit support code

Create GMF models and generate

gmfgraph gmftool gmfmap gmfgen Generate diagram editor code

Try editor... and edit models... until satisfied

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Create project

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Create Ecore (Tools) Diagram

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Edit domain model diagram

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TDT4250 - Model-driven Development of Information Systems, Autumn 2009

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Create the generator model...

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TDT4250 - Model-driven Development of Information Systems, Autumn 2009

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Create the generator model...

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TDT4250 - Model-driven Development of Information Systems, Autumn 2009

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Create the generator model...

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TDT4250 - Model-driven Development of Information Systems, Autumn 2009

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Generate model and edit support code

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TDT4250 - Model-driven Development of Information Systems, Autumn 2009

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Create gmfgraph model

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TDT4250 - Model-driven Development of Information Systems, Autumn 2009

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Create state and transition figures...

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Create state and transition figures... details

To create arrow head, you must add points to the polyline decoration using New Child > Template Point

Template Point type is at the bottom...

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Create state node and transition connection with labels

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Create gmftool

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TDT4250 - Model-driven Development of Information Systems, Autumn 2009

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Create gmfmap

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gmfmap links information in other models

domain model (ecore) – what part of the domain is shown in

the diagram

graph model (gmfgraph) – which domain elements are

mapped to which graphical elements

tool model (gmftool) – which tools are used to create which

domain elements

These models must be loaded into the editor:

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Canvas mapping

Defines the top-level mapping

domain model: The diagram represents (the content of) a

StateMachine from the EPackage stateexample

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Top level references

Defines the top-level content of the diagram, i.e. where to

start traversing the model

Child (next slide) – the mapping for this node type Children Feature – the EReference (domain model) that links

to these top-level objects

Containment Feature – the EReference that contains these

top-level objects

Children and Containment Feature are the same in this case,

since there’s only one node type

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Node mapping

Defines one mapping from domain element to

graph(ical) node element

contains sub-mappings for content/children, e.g. labels and

compartments

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Link mapping

Defines one mapping from domain element to

graph(ical) link element

contains sub-mappings for

content, e.g. labels Note the order!

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Generate gmfgen

Combines information

in the other models

Includes extra details

that can be customized

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Generate diagram editor

Creates a so-called

plugin project for the diagram editor

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Test the generated editor

Run as a new

Eclipse instances

Create new project

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Create new stateexample diagram

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