The document presents an overview of the Eclipse Modeling Project, emphasizing tools and frameworks such as EMF, OCL, CDO, and Xtext that support model-based development. It includes detailed explanations of different sub-projects and their applications, as well as the goals of the Danish Eclipse Society to promote knowledge and networking among Eclipse users. The document is aimed at providing insights into the utilities and architectures of the Eclipse platform for modeling technologies.

1. PR0029 - 2010-05-31
Redistribution and other use of this material requires written permission from The RCP Company.
Eclipse Modeling Tools - 2010-10-26
Eclipse is probably best known as a first class Java IDE, but it is so much more than
that.
In this talk, I will present the different tools that makes up the Eclipse Modeling
Project from the simple (EMF) to the very complex (QVT/O). The emphasis will be on
the immediately useful techniques with plenty of demonstrations.

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Agenda
 Eclipse is… what exactly?
 The Eclipse Architecture
 The Eclipse Modeling Project and sub-projects
 EMF, EMFT, GMP, GMT, MDT, M2M, M2T, and TMF
 The Eclipse Modeling Tools
 EMF
 OCL
 CDO
 XText
 GMF
 Jet
 Xpand
 QVT/O

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Eclipse is… what exactly?

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Eclipse – The Sweets

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ECLIPSE – The Mitsubishi Car

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Eclipse – The Java IDE

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Eclipse – The Tools Platform

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Eclipse – The Application Platform

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Eclipse – The Application Platform

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IBM Lotus Notes
Version 8

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The Eclipse Modeling Project
and sub-projects

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Eclipse Modeling Project
 “The Eclipse Modeling Project focuses on the evolution and promotion of model-based
development technologies within the Eclipse community by providing a unified set of
modeling frameworks, tooling, and standards implementations.”

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Relevant Modeling Sub-Projects
 Administrative Projects
 EMF, EMFT, GMP, GMT, MDT, M2M, M2T, and TMF
 Some Relevant Technical Projects
 EMF – Eclipse Modeling Framework – is the base technology used to represent
models
 OCL – Object Constraint Language – allows you to specify advanced constraints
and invariants
 CDO – Connected Data Objects – is a distributed shared model framework for EMF
models and meta models
 XText – is a text based editor framework for EMF models based on EBNF grammars
 GMF – Graphical Modeling Framwork – is a graphics based editor framework for
EMF models
 JET – Java Emitter Templates – is a JSP like language for generating Java code from
a model
 Xpand – is a high-level template language used to translate models to text
 QVT/O – Operational QVT (Query/View/Transformation) – is a very, very high-level
language for model to model transformations
 Teneo – is a database persistency solution for EMF using Hibernate or EclipseLink

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EMF
 Eclipse Modeling Framework – is the base technology used to represent models
 Logical models based on ER diagrams

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Logical Model for NBS – Noware Bike Shop
~
Item
HandlebarsFrame
Bike
0..*
Wheel Gear Saddle

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Logical Model for EMF
~ Named Element
Model Element
0..1
Typed ElementClassifier
Structural Feature
Attribute
Reference
Class
Data Type
0..*
0..*
0..*
type
opposite
superTypes
0..*

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OCL
 Object Constraint Language – allows you to specify advanced constraints and
invariants
 E.g.
 Item price is positive:

Context Item: inv self.price > 0
 It has exactly one Saddle:

Context Bike: inv self.items->select(i : Item | i.oclIsKindOf(Saddle))->size() == 1
 Can be tested using the interactive console
 Can be embedded directly in Ecore

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CDO
 Connected Data Objects – is a distributed shared model framework for EMF models
and meta models

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XText
 XText – is a text based editor framework for EMF models based on EBNF grammars
events
doorClosed D1CL
drawOpened D2OP
…
end
resetEvents
doorOpened
end
commands
unlockPanel PNUL
lockPanel PNLK
…
end
state idle
actions {unlockDoor lockPanel}
doorClosed => active
end
state active
drawOpened => waitingForLight
lightOn => waitingForDraw
end
…
grammar my.pack.SecretCompartments
with org.eclipse.xtext.common.Terminals
generate secretcompartment "http://www.eclipse.org/secretcompartment"
Statemachine :
'events'
(events+=Event)+
'end'
('resetEvents'
(resetEvents+=[Event])+
'end')?
'commands'
(commands+=Command)+
'end'
(states+=State)+;
Event : name=ID code=ID;
Command : name=ID code=ID;
State :
'state' name=ID
('actions' '{' (actions+=[Command])+ '}')?
(transitions+=Transition)*
'end';
Transition :
event=[Event] '=>' state=[State];

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GMF
 Graphical Modeling Framwork – is a graphics based editor framework for EMF models
 In itself also a number of models that describe how objects and graphical items and
tools maps

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JET
 Java Emitter Templates – is a JSP like language for generating Java code from a model
public <%if (isEnum) {%>enum<%} else {%>final class<%}%> <%=genEnum.getName()%> <%if (isEnum) {%>implements<%}
else {%>extends<%}%> <%=genModel.isSuppressEMFMetaData() && !genModel.isSuppressInterfaces() ? "Internal" +
genEnum.getName() : genModel.getImportedName(isEnum ? "org.eclipse.emf.common.util.Enumerator" :
"org.eclipse.emf.common.util.AbstractEnumerator")%>
{
<%if (isEnum) {%>
<%if (genEnum.getGenEnumLiterals().isEmpty()) {%>
;
<%}else {%>
<%for (Iterator<GenEnumLiteral> l = genEnum.getGenEnumLiterals().iterator(); l.hasNext(); )
{ GenEnumLiteral genEnumLiteral = l.next(); %>
/**
* The '<em><b><%=genEnumLiteral.getFormattedName()%></b></em>' literal object.
* <!-- begin-user-doc -->
* <!-- end-user-doc -->
* @see #<%=genEnumLiteral.getEnumLiteralValueConstantName()%>
* @generated
* @ordered
*/
<%=genEnumLiteral.getEnumLiteralInstanceConstantName()%>(<%=genEnumLiteral.getValue()%>, "<
%=genEnumLiteral.getName()%>", <%=Literals.toStringLiteral(genEnumLiteral.getLiteral(), genModel)%>)<%if
(l.hasNext()) {%>,<%} else {%>;<%}%><%=genModel.getNonNLS()%><%=genModel.getNonNLS(2)%>
<%}%>
<%}%>
<%}%>

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Xpand
 Xpand – is a high-level template language used to translate models to text
 Expandable and type-safe
 Has an aspect-based extension system to allow users to extend current templates
«DEFINE Root FOR data::DataModel»
«EXPAND Entity FOREACH entity»
«ENDDEFINE»
«DEFINE Entity FOR data::Entity»
«FILE name + ".java"»
public class «name» {
«FOREACH attribute AS a»
// bad practice
private «a.type» «a.name»;
«ENDFOREACH»
}
«ENDFILE»
«ENDDEFINE»

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Eclipse.dk – The Danish Eclipse Society
 Eclipse.dk was created in Marts 2007 as a meeting place for everyone interested in the
Eclipse (www.eclipse.org) platform.
 The purpose of Eclipse.dk is as follows:
 To promote the knowledge of Eclipse in Denmark.
 To create networks amongst danish Eclipse-users and developers.
 To build knowledge on Eclipse in Denmark, especially

In danish institutes of higher education.

Between danish companies developing applications based on Eclipse.
 Create and maintain a web site on Eclipse for danish users – eclipse.dk.
 Strengthen the relations between danish and international Eclipse-users and
organizations.
 The eclipse.dk society has members representing not only vendors of Eclipse-based
products and services, but also users of the platform and representatives from
institutions of higher education.

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Q & A

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About Me
 Tonny Madsen, Founder and Owner of The RCP Company
 20 years of experience in system development in major companies
 9 years experience as the Systems Architect of an 20+ MLoC project
 8 years of experience with Eclipse and Eclipse RCP
 Solutions Member of the Eclipse Foundation
 Chairman of Eclipse.dk
 Extern Lecturer at IT-University on Model Driven Development and
Domain Specific Languages
 Regular speaker at EclipseCon, Eclipse Summit, etc

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If You Want to Know More about Eclipse
 The Foundation:
 http://eclipse.org
 The Danish User Group:
 http://eclipse.dk
 The training:
 http://www.eclipse.org/community/training/classes.php
 Resources on Eclipse:
 http://www.eclipse.org/resources/
 Consolidated Blog:
 http://planeteclipse.org/

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If You Want to Know More about Modeling
 The Project:
 http://eclipse.org/modeling/
 Downloading Eclipse for Modeling:
 http://www.eclipse.org/downloads/packages/eclipse-modeling-tools-includes-
incubating-components/heliossr1
 The training:
 Not yet, but coming after the Summer
 ITU have a 14 weeks class on “Model Driven Development” -
https://mit.itu.dk/ucs/cb_www/course.sml?
course_id=913525&semester_id=912846
 Tutorials on modeling