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Textual Modeling Framework


                            Jan Koehnlein - Sven Efftinge
                                      itemis




Wednesday, March 25, 2009
Domain-Specific Language (DSL)




Wednesday, March 25, 2009
Domain-Specific Language (DSL)
               A DSL is a formal, processable language
                 targeting at a specific viewpoint or
                    aspect of a software system.




Wednesday, March 25, 2009
Domain-Specific Language (DSL)
               A DSL is a formal, processable language
                 targeting at a specific viewpoint or
                    aspect of a software system.
               It’s semantics, flexibility and notation is
                designed in order to support working
               with that viewpoint as good as possible.


Wednesday, March 25, 2009
Why DSLs?

                            • higher abstractions
                            • avoid redundancy
                            • separation of concerns
                            • use domain concepts
                             (Ubiquitous Language)




Wednesday, March 25, 2009
The challenge




Wednesday, March 25, 2009
Complicated
Wednesday, March 25, 2009
Complicated & Expensive ?
Wednesday, March 25, 2009
licensed by http://www.wordle.net/
Wednesday, March 25, 2009
How we address this with




Wednesday, March 25, 2009
Convenience
Wednesday, March 25, 2009
Wednesday, March 25, 2009
Wednesday, March 25, 2009
Wednesday, March 25, 2009
Wednesday, March 25, 2009
Wednesday, March 25, 2009
Wednesday, March 25, 2009
Wednesday, March 25, 2009
Wednesday, March 25, 2009
Wednesday, March 25, 2009
grammar org.xtext.example.MyDsl
                            	   with org.eclipse.xtext.common.Terminals

                            generate myDsl quot;http://www.xtext.org/example/MyDslquot;

                            Model:
                            	   (types+=Type)*;
                            	
                            Type:
                            	   Datatype | Entity;
                            	
                            Datatype:
                            	   'datatype' name=ID;
                            	
                            Entity:
                            	   'entity' name=ID '{'
                            	   	   (features+=Feature)*
                            	   '}';
                            	
                            Feature:
                            	   type=[Type] name=ID;



Wednesday, March 25, 2009
Grammar Definition
                            grammar org.xtext.example.MyDsl
                            	   with org.eclipse.xtext.common.Terminals

                            generate myDsl quot;http://www.xtext.org/example/MyDslquot;

                            Model:
                            	   (types+=Type)*;
                            	
                            Type:
                            	   Datatype | Entity;
                            	
                            Datatype:
                            	   'datatype' name=ID;
                            	
                            Entity:
                            	   'entity' name=ID '{'
                            	   	   (features+=Feature)*
                            	   '}';
                            	
                            Feature:
                            	   type=[Type] name=ID;



Wednesday, March 25, 2009
Grammar Definition                Terminal Rule Import
                            grammar org.xtext.example.MyDsl
                            	   with org.eclipse.xtext.common.Terminals

                            generate myDsl quot;http://www.xtext.org/example/MyDslquot;

                            Model:
                            	   (types+=Type)*;
                            	
                            Type:
                            	   Datatype | Entity;
                            	
                            Datatype:
                            	   'datatype' name=ID;
                            	
                            Entity:
                            	   'entity' name=ID '{'
                            	   	   (features+=Feature)*
                            	   '}';
                            	
                            Feature:
                            	   type=[Type] name=ID;



Wednesday, March 25, 2009
Grammar Definition                Terminal Rule Import
                            grammar org.xtext.example.MyDsl
  Derived                   	   with org.eclipse.xtext.common.Terminals

 Metamodel generate myDsl quot;http://www.xtext.org/example/MyDslquot;
                            Model:
                            	   (types+=Type)*;
                            	
                            Type:
                            	   Datatype | Entity;
                            	
                            Datatype:
                            	   'datatype' name=ID;
                            	
                            Entity:
                            	   'entity' name=ID '{'
                            	   	   (features+=Feature)*
                            	   '}';
                            	
                            Feature:
                            	   type=[Type] name=ID;



Wednesday, March 25, 2009
Grammar Definition                Terminal Rule Import
                            grammar org.xtext.example.MyDsl
  Derived                   	   with org.eclipse.xtext.common.Terminals

 Metamodel generate myDsl quot;http://www.xtext.org/example/MyDslquot;
                            Model:
       Parser               	   (types+=Type)*;
                            	
       Rules                Type:
                            	   Datatype | Entity;
                            	
                            Datatype:
                            	   'datatype' name=ID;
                            	
                            Entity:
                            	   'entity' name=ID '{'
                            	   	   (features+=Feature)*
                            	   '}';
                            	
                            Feature:
                            	   type=[Type] name=ID;



Wednesday, March 25, 2009
Grammar Definition                Terminal Rule Import
                            grammar org.xtext.example.MyDsl
  Derived                   	   with org.eclipse.xtext.common.Terminals

 Metamodel generate myDsl quot;http://www.xtext.org/example/MyDslquot;
                                                           Containment
                                                             Reference
           Model:
  Parser   	   (types+=Type)*;
                            	
        Rules               Type:
                            	   Datatype | Entity;
                            	
                            Datatype:
                            	   'datatype' name=ID;
                            	
                            Entity:
                            	   'entity' name=ID '{'
                            	   	   (features+=Feature)*
                            	   '}';
                            	
                            Feature:
                            	   type=[Type] name=ID;



Wednesday, March 25, 2009
Grammar Definition                Terminal Rule Import
                            grammar org.xtext.example.MyDsl
  Derived                   	   with org.eclipse.xtext.common.Terminals

 Metamodel generate myDsl quot;http://www.xtext.org/example/MyDslquot;
                                                           Containment
                                                             Reference
           Model:
  Parser 	 	   (types+=Type)*;

                                                             Cardinality
   Rules Type:
                            	   Datatype | Entity;
                            	
                            Datatype:
                            	   'datatype' name=ID;
                            	
                            Entity:
                            	   'entity' name=ID '{'
                            	   	   (features+=Feature)*
                            	   '}';
                            	
                            Feature:
                            	   type=[Type] name=ID;



Wednesday, March 25, 2009
Grammar Definition                Terminal Rule Import
                            grammar org.xtext.example.MyDsl
  Derived                   	   with org.eclipse.xtext.common.Terminals

 Metamodel generate myDsl quot;http://www.xtext.org/example/MyDslquot;
                                                           Containment
                                                             Reference
           Model:
  Parser 	 	   (types+=Type)*;

                                                             Cardinality
   Rules Type:
                            	   Datatype | Entity;
                                                                          Alternatives
                            	
                            Datatype:
                            	   'datatype' name=ID;
                            	
                            Entity:
                            	   'entity' name=ID '{'
                            	   	   (features+=Feature)*
                            	   '}';
                            	
                            Feature:
                            	   type=[Type] name=ID;



Wednesday, March 25, 2009
Grammar Definition                Terminal Rule Import
                            grammar org.xtext.example.MyDsl
  Derived                   	   with org.eclipse.xtext.common.Terminals

 Metamodel generate myDsl quot;http://www.xtext.org/example/MyDslquot;
                                                           Containment
                                                             Reference
           Model:
  Parser 	 	   (types+=Type)*;

                                                             Cardinality
   Rules Type:
                            	   Datatype | Entity;
                                                                          Alternatives
                            	
                            Datatype:
                            	   'datatype' name=ID;
                                                                            Call to
                            	
                            Entity:
                                                                           Terminal
                            	   'entity' name=ID '{'
                            	   	   (features+=Feature)*
                                                                             Rule
                            	   '}';
                            	
                            Feature:
                            	   type=[Type] name=ID;



Wednesday, March 25, 2009
Grammar Definition                Terminal Rule Import
                            grammar org.xtext.example.MyDsl
  Derived                   	   with org.eclipse.xtext.common.Terminals

 Metamodel generate myDsl quot;http://www.xtext.org/example/MyDslquot;
                                                           Containment
                                                             Reference
           Model:
  Parser 	 	   (types+=Type)*;

                                                             Cardinality
   Rules Type:
                            	   Datatype | Entity;
                                                                          Alternatives
                            	
                            Datatype:
                            	   'datatype' name=ID;
                                                                            Call to
                            	
                            Entity:
  Keywords                                                                 Terminal
                            	   'entity' name=ID '{'
                            	   	   (features+=Feature)*
                                                                             Rule
                            	   '}';
                            	
                            Feature:
                            	   type=[Type] name=ID;



Wednesday, March 25, 2009
Grammar Definition                Terminal Rule Import
                            grammar org.xtext.example.MyDsl
  Derived                   	   with org.eclipse.xtext.common.Terminals

 Metamodel generate myDsl quot;http://www.xtext.org/example/MyDslquot;
                                                           Containment
                                                             Reference
           Model:
  Parser 	 	   (types+=Type)*;

                                                             Cardinality
   Rules Type:
                            	   Datatype | Entity;
                                                                          Alternatives
                            	
                            Datatype:
                            	   'datatype' name=ID;
                                                                            Call to
                            	
                            Entity:
  Keywords                                                                 Terminal
                            	   'entity' name=ID '{'
                            	   	   (features+=Feature)*
                                                             Cross           Rule
                            	   '}';
                            	
                                                            Reference
                            Feature:
                            	   type=[Type] name=ID;



Wednesday, March 25, 2009
Metamodel Derivation
                                                  MyDsl
    grammar org.xtext.example.MyDsl
    	   with org.eclipse.xtext.common.Terminals
                                                                    Model

    generate myDsl
      quot;http://www.xtext.org/example/MyDslquot;

    Model:                                                               *
                                                                     Type
    	   (types+=Type)*;
    	                                                            name: String
    Type:
    	   Datatype | Entity;
    	
    Datatype:                                        Datatype                        Entity
    	   'datatype' name=ID;
    	
    Entity:
    	   'entity' name=ID '{'                              type
    	   	    (features+=Feature)*                                                       *
    	   '}';                                                                        Feature
                                                                             *
    	
                                                                                 name: String
    Feature:
    	   type=[Datatype] name=ID;



Wednesday, March 25, 2009
Metamodel Derivation
                                                  MyDsl
    grammar org.xtext.example.MyDsl
    	   with org.eclipse.xtext.common.Terminals
                                                                    Model

    generate myDsl
      quot;http://www.xtext.org/example/MyDslquot;

    Model:                                                               *
                                                                     Type
    	   (types+=Type)*;
    	                                                            name: String
    Type:
    	   Datatype | Entity;
    	
    Datatype:                                        Datatype                        Entity
    	   'datatype' name=ID;
    	
    Entity:
    	   'entity' name=ID '{'                              type
    	   	    (features+=Feature)*                                                       *
    	   '}';                                                                        Feature
                                                                             *
    	
                                                                                 name: String
    Feature:
    	   type=[Datatype] name=ID;



Wednesday, March 25, 2009
Metamodel Derivation
                                                  MyDsl
    grammar org.xtext.example.MyDsl
    	   with org.eclipse.xtext.common.Terminals
                                                                    Model

    generate myDsl
      quot;http://www.xtext.org/example/MyDslquot;

    Model:                                                               *
                                                                     Type
    	   (types+=Type)*;
    	                                                            name: String
    Type:
    	   Datatype | Entity;
    	
    Datatype:                                        Datatype                        Entity
    	   'datatype' name=ID;
    	
    Entity:
    	   'entity' name=ID '{'                              type
    	   	    (features+=Feature)*                                                       *
    	   '}';                                                                        Feature
                                                                             *
    	
                                                                                 name: String
    Feature:
    	   type=[Datatype] name=ID;



Wednesday, March 25, 2009
Metamodel Derivation
                                                  MyDsl
    grammar org.xtext.example.MyDsl
    	   with org.eclipse.xtext.common.Terminals
                                                                    Model

    generate myDsl
      quot;http://www.xtext.org/example/MyDslquot;

    Model:                                                               *
                                                                     Type
    	   (types+=Type)*;
    	                                                            name: String
    Type:
    	   Datatype | Entity;
    	
    Datatype:                                        Datatype                        Entity
    	   'datatype' name=ID;
    	
    Entity:
    	   'entity' name=ID '{'                              type
    	   	    (features+=Feature)*                                                       *
    	   '}';                                                                        Feature
                                                                             *
    	
                                                                                 name: String
    Feature:
    	   type=[Datatype] name=ID;



Wednesday, March 25, 2009
Metamodel Derivation
                                                  MyDsl
    grammar org.xtext.example.MyDsl
    	   with org.eclipse.xtext.common.Terminals
                                                                    Model

    generate myDsl
      quot;http://www.xtext.org/example/MyDslquot;

    Model:                                                               *
                                                                     Type
    	   (types+=Type)*;
    	                                                            name: String
    Type:
    	   Datatype | Entity;
    	
    Datatype:                                        Datatype                        Entity
    	   'datatype' name=ID;
    	
    Entity:
    	   'entity' name=ID '{'                              type
    	   	    (features+=Feature)*                                                       *
    	   '}';                                                                        Feature
                                                                             *
    	
                                                                                 name: String
    Feature:
    	   type=[Datatype] name=ID;



Wednesday, March 25, 2009
Metamodel Derivation
                                                  MyDsl
    grammar org.xtext.example.MyDsl
    	   with org.eclipse.xtext.common.Terminals
                                                                    Model

    generate myDsl
      quot;http://www.xtext.org/example/MyDslquot;

    Model:                                                               *
                                                                     Type
    	   (types+=Type)*;
    	                                                            name: String
    Type:
    	   Datatype | Entity;
    	
    Datatype:                                        Datatype                        Entity
    	   'datatype' name=ID;
    	
    Entity:
    	   'entity' name=ID '{'                              type
    	   	    (features+=Feature)*                                                       *
    	   '}';                                                                        Feature
                                                                             *
    	
                                                                                 name: String
    Feature:
    	   type=[Datatype] name=ID;



Wednesday, March 25, 2009
Metamodel Derivation
                                                  MyDsl
    grammar org.xtext.example.MyDsl
    	   with org.eclipse.xtext.common.Terminals
                                                                    Model

    generate myDsl
      quot;http://www.xtext.org/example/MyDslquot;

    Model:                                                               *
                                                                     Type
    	   (types+=Type)*;
    	                                                            name: String
    Type:
    	   Datatype | Entity;
    	
    Datatype:                                        Datatype                        Entity
    	   'datatype' name=ID;
    	
    Entity:
    	   'entity' name=ID '{'                              type
    	   	    (features+=Feature)*                                                       *
    	   '}';                                                                        Feature
                                                                             *
    	
                                                                                 name: String
    Feature:
    	   type=[Datatype] name=ID;



Wednesday, March 25, 2009
Metamodel Derivation
                                                  MyDsl
    grammar org.xtext.example.MyDsl
    	   with org.eclipse.xtext.common.Terminals
                                                                    Model

    generate myDsl
      quot;http://www.xtext.org/example/MyDslquot;

    Model:                                                               *
                                                                     Type
    	   (types+=Type)*;
    	                                                            name: String
    Type:
    	   Datatype | Entity;
    	
    Datatype:                                        Datatype                        Entity
    	   'datatype' name=ID;
    	
    Entity:
    	   'entity' name=ID '{'                              type
    	   	    (features+=Feature)*                                                       *
    	   '}';                                                                        Feature
                                                                             *
    	
                                                                                 name: String
    Feature:
    	   type=[Datatype] name=ID;



Wednesday, March 25, 2009
Metamodel Derivation
                                                  MyDsl
    grammar org.xtext.example.MyDsl
    	   with org.eclipse.xtext.common.Terminals
                                                                    Model

    generate myDsl
      quot;http://www.xtext.org/example/MyDslquot;

    Model:                                                               *
                                                                     Type
    	   (types+=Type)*;
    	                                                            name: String
    Type:
    	   Datatype | Entity;
    	
    Datatype:                                        Datatype                        Entity
    	   'datatype' name=ID;
    	
    Entity:
    	   'entity' name=ID '{'                              type
    	   	    (features+=Feature)*                                                       *
    	   '}';                                                                        Feature
                                                                             *
    	
                                                                                 name: String
    Feature:
    	   type=[Datatype] name=ID;



Wednesday, March 25, 2009
Metamodel Derivation
                                                  MyDsl
    grammar org.xtext.example.MyDsl
    	   with org.eclipse.xtext.common.Terminals
                                                                    Model

    generate myDsl
      quot;http://www.xtext.org/example/MyDslquot;

    Model:                                                               *
                                                                     Type
    	   (types+=Type)*;
    	                                                            name: String
    Type:
    	   Datatype | Entity;
    	
    Datatype:                                        Datatype                        Entity
    	   'datatype' name=ID;
    	
    Entity:
    	   'entity' name=ID '{'                              type
    	   	    (features+=Feature)*                                                       *
    	   '}';                                                                        Feature
                                                                             *
    	
                                                                                 name: String
    Feature:
    	   type=[Datatype] name=ID;



Wednesday, March 25, 2009
Metamodel Derivation
                                                  MyDsl
    grammar org.xtext.example.MyDsl
    	   with org.eclipse.xtext.common.Terminals
                                                                    Model

    generate myDsl
      quot;http://www.xtext.org/example/MyDslquot;

    Model:                                                               *
                                                                     Type
    	   (types+=Type)*;
    	                                                            name: String
    Type:
    	   Datatype | Entity;
    	
    Datatype:                                        Datatype                        Entity
    	   'datatype' name=ID;
    	
    Entity:
    	   'entity' name=ID '{'                              type
    	   	    (features+=Feature)*                                                       *
    	   '}';                                                                        Feature
                                                                             *
    	
                                                                                 name: String
    Feature:
    	   type=[Datatype] name=ID;



Wednesday, March 25, 2009
Metamodel Derivation
                                                  MyDsl
    grammar org.xtext.example.MyDsl
    	   with org.eclipse.xtext.common.Terminals
                                                                    Model

    generate myDsl
      quot;http://www.xtext.org/example/MyDslquot;

    Model:                                                               *
                                                                     Type
    	   (types+=Type)*;
    	                                                            name: String
    Type:
    	   Datatype | Entity;
    	
    Datatype:                                        Datatype                        Entity
    	   'datatype' name=ID;
    	
    Entity:
    	   'entity' name=ID '{'                              type
    	   	    (features+=Feature)*                                                       *
    	   '}';                                                                        Feature
                                                                             *
    	
                                                                                 name: String
    Feature:
    	   type=[Datatype] name=ID;



Wednesday, March 25, 2009
licensed by http://www.wordle.net/
Wednesday, March 25, 2009
Based on
            the grammar and Ecore models,
            Xtext provides you with sensible
                default implementations.


                                        licensed by http://www.wordle.net/
Wednesday, March 25, 2009
Validation


Wednesday, March 25, 2009
Wednesday, March 25, 2009
Wednesday, March 25, 2009
Wednesday, March 25, 2009
Wednesday, March 25, 2009
Customizing the LabelProvider

              public class MySpecialLabelProvider
                     extends DefaultLabelProvider {

                    public String label(Feature f) {
                       return f.getName()+quot;:quot;+f.getType().getName();
                    }
              }


            ‣Naming Convention
            ‣Polymorphic Dispatch
            ‣Fault tolerance


Wednesday, March 25, 2009
Flexibility
Wednesday, March 25, 2009
licensed by http://www.wordle.net/
Wednesday, March 25, 2009
Dependency management




                            licensed by http://www.wordle.net/
Wednesday, March 25, 2009
Dependency management




                            licensed by http://www.wordle.net/
Wednesday, March 25, 2009
Dependency management




                            licensed by http://www.wordle.net/
Wednesday, March 25, 2009
Dependency management




                            licensed by http://www.wordle.net/
Wednesday, March 25, 2009
Dependency management




                            licensed by http://www.wordle.net/
Wednesday, March 25, 2009
MyCustomLabelProvider




                                        licensed by http://www.wordle.net/
Wednesday, March 25, 2009
Dependency Injection
                   with Google fGuice




Wednesday, March 25, 2009
Dependency Injection
                   with Google fGuice




Wednesday, March 25, 2009
Dependency Injection
                   with Google fGuice




          ‣No dependency to concrete implementation



Wednesday, March 25, 2009
Dependency Injection
                   with Google fGuice




          ‣No dependency to concrete implementation
          ‣No explicit construction


Wednesday, March 25, 2009
Dependency Injection
                   with Google fGuice




          ‣No dependency to concrete implementation
          ‣No explicit construction
          ‣Easy testing

Wednesday, March 25, 2009
Dependency Injection
                   with Google fGuice




          ‣No dependency to concrete implementation
          ‣No explicit construction
          ‣Easy testing
          ‣Easy composition
Wednesday, March 25, 2009
Configuration of
                      Components in Xtext
                            AbstractDeclarativeModule




            DefaultRuntimeModule                 DefaultUIModule
                                                                    From Xtext

                                                                    Your Project
         GeneratedRuntimeModule                 GeneratedUIModule




                 RuntimeModule                          UIModule




Wednesday, March 25, 2009
Configuration of
                    Components in Xtext
        /**
          * used to register components to be used within the IDE.
          */
        public class DomainmodelUiModule
        	 	 extends GeneratedDomainmodelUiModule {
        	
        	 @Override
        	 public Class<? extends ILabelProvider> bindILabelProvider() {
        	 	 return MySpecialLabelProvider.class;
        	}
        }




Wednesday, March 25, 2009
and Equinox

         Injector is created during Bundle.start(...)
    	 @Override
    	 public void start(BundleContext context) throws Exception {
    	 	 super.start(context);
    	 	 INSTANCE = this;
    	 	 injector = Guice.createInjector(
              new DomainmodelRuntimeModule(),
              new DomainmodelUiModule());
    	}
    	




Wednesday, March 25, 2009
and Equinox

         ExecutableExtensions are created via
         IExecutableExtensionFactory
     	     <extension
     	     	 point=quot;org.eclipse.emf.ecore.extension_parserquot;>
     	     	 <parser class=quot;my.pack.DomainmodelExecutableExtensionFactory:
                              org.eclipse.xtext.resource.XtextResourceFactoryquot;
     	     	 	 type=quot;dmodelquot;>
     	     	 </parser>
     	     </extension>




Wednesday, March 25, 2009
Composable
                            Code Generator
                       ‣ generator is composed of “fragments”




Wednesday, March 25, 2009
Composable
                            Code Generator
                       ‣ generator is composed of “fragments”
                       ‣ fragments can contribute to:




Wednesday, March 25, 2009
Composable
                            Code Generator
                       ‣ generator is composed of “fragments”
                       ‣ fragments can contribute to:
                        ‣ Manifest.MF



Wednesday, March 25, 2009
Composable
                            Code Generator
                       ‣ generator is composed of “fragments”
                       ‣ fragments can contribute to:
                        ‣ Manifest.MF
                        ‣ plugin.xml


Wednesday, March 25, 2009
Composable
                            Code Generator
                       ‣ generator is composed of “fragments”
                       ‣ fragments can contribute to:
                        ‣ Manifest.MF
                        ‣ plugin.xml
                        ‣ Guice modules

Wednesday, March 25, 2009
Composable
                            Code Generator
                       ‣ generator is composed of “fragments”
                       ‣ fragments can contribute to:
                        ‣ Manifest.MF
                        ‣ plugin.xml
                        ‣ Guice modules
                       ‣ Add your own fragments
Wednesday, March 25, 2009
Future Plans
Wednesday, March 25, 2009
Galileo




Wednesday, March 25, 2009
Galileo
       •      Index




Wednesday, March 25, 2009
Galileo
       •      Index
       • Enum Rules




Wednesday, March 25, 2009
Galileo
       •      Index
       • Enum Rules
       • Bug fixing / Performance Tuning




Wednesday, March 25, 2009
Galileo
       •      Index
       • Enum Rules
       • Bug fixing / Performance Tuning
       • Documentation



Wednesday, March 25, 2009
Galileo
       •      Index
       • Enum Rules
       • Bug fixing / Performance Tuning
       • Documentation
       • Sugar (Wizards, Tutorials, etc.)

Wednesday, March 25, 2009
Post Galileo




Wednesday, March 25, 2009
Post Galileo

         ‣      More UI features




Wednesday, March 25, 2009
Post Galileo

         ‣      More UI features

         ‣Basic Language Libraries




Wednesday, March 25, 2009
Post Galileo

         ‣      More UI features

         ‣Basic Language Libraries

         ‣“Eat your own dog food”
                continued


Wednesday, March 25, 2009
Thank you very much for listening

      Visit the project’s web site :
             www.xtext.org

     Copyright 2009 by itemis



Wednesday, March 25, 2009
Convenient & Flexible
Wednesday, March 25, 2009

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Xtext Eclipse Con

  • 1. Textual Modeling Framework Jan Koehnlein - Sven Efftinge itemis Wednesday, March 25, 2009
  • 3. Domain-Specific Language (DSL) A DSL is a formal, processable language targeting at a specific viewpoint or aspect of a software system. Wednesday, March 25, 2009
  • 4. Domain-Specific Language (DSL) A DSL is a formal, processable language targeting at a specific viewpoint or aspect of a software system. It’s semantics, flexibility and notation is designed in order to support working with that viewpoint as good as possible. Wednesday, March 25, 2009
  • 5. Why DSLs? • higher abstractions • avoid redundancy • separation of concerns • use domain concepts (Ubiquitous Language) Wednesday, March 25, 2009
  • 8. Complicated & Expensive ? Wednesday, March 25, 2009
  • 10. How we address this with Wednesday, March 25, 2009
  • 21. grammar org.xtext.example.MyDsl with org.eclipse.xtext.common.Terminals generate myDsl quot;http://www.xtext.org/example/MyDslquot; Model: (types+=Type)*; Type: Datatype | Entity; Datatype: 'datatype' name=ID; Entity: 'entity' name=ID '{' (features+=Feature)* '}'; Feature: type=[Type] name=ID; Wednesday, March 25, 2009
  • 22. Grammar Definition grammar org.xtext.example.MyDsl with org.eclipse.xtext.common.Terminals generate myDsl quot;http://www.xtext.org/example/MyDslquot; Model: (types+=Type)*; Type: Datatype | Entity; Datatype: 'datatype' name=ID; Entity: 'entity' name=ID '{' (features+=Feature)* '}'; Feature: type=[Type] name=ID; Wednesday, March 25, 2009
  • 23. Grammar Definition Terminal Rule Import grammar org.xtext.example.MyDsl with org.eclipse.xtext.common.Terminals generate myDsl quot;http://www.xtext.org/example/MyDslquot; Model: (types+=Type)*; Type: Datatype | Entity; Datatype: 'datatype' name=ID; Entity: 'entity' name=ID '{' (features+=Feature)* '}'; Feature: type=[Type] name=ID; Wednesday, March 25, 2009
  • 24. Grammar Definition Terminal Rule Import grammar org.xtext.example.MyDsl Derived with org.eclipse.xtext.common.Terminals Metamodel generate myDsl quot;http://www.xtext.org/example/MyDslquot; Model: (types+=Type)*; Type: Datatype | Entity; Datatype: 'datatype' name=ID; Entity: 'entity' name=ID '{' (features+=Feature)* '}'; Feature: type=[Type] name=ID; Wednesday, March 25, 2009
  • 25. Grammar Definition Terminal Rule Import grammar org.xtext.example.MyDsl Derived with org.eclipse.xtext.common.Terminals Metamodel generate myDsl quot;http://www.xtext.org/example/MyDslquot; Model: Parser (types+=Type)*; Rules Type: Datatype | Entity; Datatype: 'datatype' name=ID; Entity: 'entity' name=ID '{' (features+=Feature)* '}'; Feature: type=[Type] name=ID; Wednesday, March 25, 2009
  • 26. Grammar Definition Terminal Rule Import grammar org.xtext.example.MyDsl Derived with org.eclipse.xtext.common.Terminals Metamodel generate myDsl quot;http://www.xtext.org/example/MyDslquot; Containment Reference Model: Parser (types+=Type)*; Rules Type: Datatype | Entity; Datatype: 'datatype' name=ID; Entity: 'entity' name=ID '{' (features+=Feature)* '}'; Feature: type=[Type] name=ID; Wednesday, March 25, 2009
  • 27. Grammar Definition Terminal Rule Import grammar org.xtext.example.MyDsl Derived with org.eclipse.xtext.common.Terminals Metamodel generate myDsl quot;http://www.xtext.org/example/MyDslquot; Containment Reference Model: Parser (types+=Type)*; Cardinality Rules Type: Datatype | Entity; Datatype: 'datatype' name=ID; Entity: 'entity' name=ID '{' (features+=Feature)* '}'; Feature: type=[Type] name=ID; Wednesday, March 25, 2009
  • 28. Grammar Definition Terminal Rule Import grammar org.xtext.example.MyDsl Derived with org.eclipse.xtext.common.Terminals Metamodel generate myDsl quot;http://www.xtext.org/example/MyDslquot; Containment Reference Model: Parser (types+=Type)*; Cardinality Rules Type: Datatype | Entity; Alternatives Datatype: 'datatype' name=ID; Entity: 'entity' name=ID '{' (features+=Feature)* '}'; Feature: type=[Type] name=ID; Wednesday, March 25, 2009
  • 29. Grammar Definition Terminal Rule Import grammar org.xtext.example.MyDsl Derived with org.eclipse.xtext.common.Terminals Metamodel generate myDsl quot;http://www.xtext.org/example/MyDslquot; Containment Reference Model: Parser (types+=Type)*; Cardinality Rules Type: Datatype | Entity; Alternatives Datatype: 'datatype' name=ID; Call to Entity: Terminal 'entity' name=ID '{' (features+=Feature)* Rule '}'; Feature: type=[Type] name=ID; Wednesday, March 25, 2009
  • 30. Grammar Definition Terminal Rule Import grammar org.xtext.example.MyDsl Derived with org.eclipse.xtext.common.Terminals Metamodel generate myDsl quot;http://www.xtext.org/example/MyDslquot; Containment Reference Model: Parser (types+=Type)*; Cardinality Rules Type: Datatype | Entity; Alternatives Datatype: 'datatype' name=ID; Call to Entity: Keywords Terminal 'entity' name=ID '{' (features+=Feature)* Rule '}'; Feature: type=[Type] name=ID; Wednesday, March 25, 2009
  • 31. Grammar Definition Terminal Rule Import grammar org.xtext.example.MyDsl Derived with org.eclipse.xtext.common.Terminals Metamodel generate myDsl quot;http://www.xtext.org/example/MyDslquot; Containment Reference Model: Parser (types+=Type)*; Cardinality Rules Type: Datatype | Entity; Alternatives Datatype: 'datatype' name=ID; Call to Entity: Keywords Terminal 'entity' name=ID '{' (features+=Feature)* Cross Rule '}'; Reference Feature: type=[Type] name=ID; Wednesday, March 25, 2009
  • 32. Metamodel Derivation MyDsl grammar org.xtext.example.MyDsl with org.eclipse.xtext.common.Terminals Model generate myDsl quot;http://www.xtext.org/example/MyDslquot; Model: * Type (types+=Type)*; name: String Type: Datatype | Entity; Datatype: Datatype Entity 'datatype' name=ID; Entity: 'entity' name=ID '{' type (features+=Feature)* * '}'; Feature * name: String Feature: type=[Datatype] name=ID; Wednesday, March 25, 2009
  • 33. Metamodel Derivation MyDsl grammar org.xtext.example.MyDsl with org.eclipse.xtext.common.Terminals Model generate myDsl quot;http://www.xtext.org/example/MyDslquot; Model: * Type (types+=Type)*; name: String Type: Datatype | Entity; Datatype: Datatype Entity 'datatype' name=ID; Entity: 'entity' name=ID '{' type (features+=Feature)* * '}'; Feature * name: String Feature: type=[Datatype] name=ID; Wednesday, March 25, 2009
  • 34. Metamodel Derivation MyDsl grammar org.xtext.example.MyDsl with org.eclipse.xtext.common.Terminals Model generate myDsl quot;http://www.xtext.org/example/MyDslquot; Model: * Type (types+=Type)*; name: String Type: Datatype | Entity; Datatype: Datatype Entity 'datatype' name=ID; Entity: 'entity' name=ID '{' type (features+=Feature)* * '}'; Feature * name: String Feature: type=[Datatype] name=ID; Wednesday, March 25, 2009
  • 35. Metamodel Derivation MyDsl grammar org.xtext.example.MyDsl with org.eclipse.xtext.common.Terminals Model generate myDsl quot;http://www.xtext.org/example/MyDslquot; Model: * Type (types+=Type)*; name: String Type: Datatype | Entity; Datatype: Datatype Entity 'datatype' name=ID; Entity: 'entity' name=ID '{' type (features+=Feature)* * '}'; Feature * name: String Feature: type=[Datatype] name=ID; Wednesday, March 25, 2009
  • 36. Metamodel Derivation MyDsl grammar org.xtext.example.MyDsl with org.eclipse.xtext.common.Terminals Model generate myDsl quot;http://www.xtext.org/example/MyDslquot; Model: * Type (types+=Type)*; name: String Type: Datatype | Entity; Datatype: Datatype Entity 'datatype' name=ID; Entity: 'entity' name=ID '{' type (features+=Feature)* * '}'; Feature * name: String Feature: type=[Datatype] name=ID; Wednesday, March 25, 2009
  • 37. Metamodel Derivation MyDsl grammar org.xtext.example.MyDsl with org.eclipse.xtext.common.Terminals Model generate myDsl quot;http://www.xtext.org/example/MyDslquot; Model: * Type (types+=Type)*; name: String Type: Datatype | Entity; Datatype: Datatype Entity 'datatype' name=ID; Entity: 'entity' name=ID '{' type (features+=Feature)* * '}'; Feature * name: String Feature: type=[Datatype] name=ID; Wednesday, March 25, 2009
  • 38. Metamodel Derivation MyDsl grammar org.xtext.example.MyDsl with org.eclipse.xtext.common.Terminals Model generate myDsl quot;http://www.xtext.org/example/MyDslquot; Model: * Type (types+=Type)*; name: String Type: Datatype | Entity; Datatype: Datatype Entity 'datatype' name=ID; Entity: 'entity' name=ID '{' type (features+=Feature)* * '}'; Feature * name: String Feature: type=[Datatype] name=ID; Wednesday, March 25, 2009
  • 39. Metamodel Derivation MyDsl grammar org.xtext.example.MyDsl with org.eclipse.xtext.common.Terminals Model generate myDsl quot;http://www.xtext.org/example/MyDslquot; Model: * Type (types+=Type)*; name: String Type: Datatype | Entity; Datatype: Datatype Entity 'datatype' name=ID; Entity: 'entity' name=ID '{' type (features+=Feature)* * '}'; Feature * name: String Feature: type=[Datatype] name=ID; Wednesday, March 25, 2009
  • 40. Metamodel Derivation MyDsl grammar org.xtext.example.MyDsl with org.eclipse.xtext.common.Terminals Model generate myDsl quot;http://www.xtext.org/example/MyDslquot; Model: * Type (types+=Type)*; name: String Type: Datatype | Entity; Datatype: Datatype Entity 'datatype' name=ID; Entity: 'entity' name=ID '{' type (features+=Feature)* * '}'; Feature * name: String Feature: type=[Datatype] name=ID; Wednesday, March 25, 2009
  • 41. Metamodel Derivation MyDsl grammar org.xtext.example.MyDsl with org.eclipse.xtext.common.Terminals Model generate myDsl quot;http://www.xtext.org/example/MyDslquot; Model: * Type (types+=Type)*; name: String Type: Datatype | Entity; Datatype: Datatype Entity 'datatype' name=ID; Entity: 'entity' name=ID '{' type (features+=Feature)* * '}'; Feature * name: String Feature: type=[Datatype] name=ID; Wednesday, March 25, 2009
  • 42. Metamodel Derivation MyDsl grammar org.xtext.example.MyDsl with org.eclipse.xtext.common.Terminals Model generate myDsl quot;http://www.xtext.org/example/MyDslquot; Model: * Type (types+=Type)*; name: String Type: Datatype | Entity; Datatype: Datatype Entity 'datatype' name=ID; Entity: 'entity' name=ID '{' type (features+=Feature)* * '}'; Feature * name: String Feature: type=[Datatype] name=ID; Wednesday, March 25, 2009
  • 43. Metamodel Derivation MyDsl grammar org.xtext.example.MyDsl with org.eclipse.xtext.common.Terminals Model generate myDsl quot;http://www.xtext.org/example/MyDslquot; Model: * Type (types+=Type)*; name: String Type: Datatype | Entity; Datatype: Datatype Entity 'datatype' name=ID; Entity: 'entity' name=ID '{' type (features+=Feature)* * '}'; Feature * name: String Feature: type=[Datatype] name=ID; Wednesday, March 25, 2009
  • 45. Based on the grammar and Ecore models, Xtext provides you with sensible default implementations. licensed by http://www.wordle.net/ Wednesday, March 25, 2009
  • 51. Customizing the LabelProvider public class MySpecialLabelProvider extends DefaultLabelProvider { public String label(Feature f) { return f.getName()+quot;:quot;+f.getType().getName(); } } ‣Naming Convention ‣Polymorphic Dispatch ‣Fault tolerance Wednesday, March 25, 2009
  • 54. Dependency management licensed by http://www.wordle.net/ Wednesday, March 25, 2009
  • 55. Dependency management licensed by http://www.wordle.net/ Wednesday, March 25, 2009
  • 56. Dependency management licensed by http://www.wordle.net/ Wednesday, March 25, 2009
  • 57. Dependency management licensed by http://www.wordle.net/ Wednesday, March 25, 2009
  • 58. Dependency management licensed by http://www.wordle.net/ Wednesday, March 25, 2009
  • 59. MyCustomLabelProvider licensed by http://www.wordle.net/ Wednesday, March 25, 2009
  • 60. Dependency Injection with Google fGuice Wednesday, March 25, 2009
  • 61. Dependency Injection with Google fGuice Wednesday, March 25, 2009
  • 62. Dependency Injection with Google fGuice ‣No dependency to concrete implementation Wednesday, March 25, 2009
  • 63. Dependency Injection with Google fGuice ‣No dependency to concrete implementation ‣No explicit construction Wednesday, March 25, 2009
  • 64. Dependency Injection with Google fGuice ‣No dependency to concrete implementation ‣No explicit construction ‣Easy testing Wednesday, March 25, 2009
  • 65. Dependency Injection with Google fGuice ‣No dependency to concrete implementation ‣No explicit construction ‣Easy testing ‣Easy composition Wednesday, March 25, 2009
  • 66. Configuration of Components in Xtext AbstractDeclarativeModule DefaultRuntimeModule DefaultUIModule From Xtext Your Project GeneratedRuntimeModule GeneratedUIModule RuntimeModule UIModule Wednesday, March 25, 2009
  • 67. Configuration of Components in Xtext /** * used to register components to be used within the IDE. */ public class DomainmodelUiModule extends GeneratedDomainmodelUiModule { @Override public Class<? extends ILabelProvider> bindILabelProvider() { return MySpecialLabelProvider.class; } } Wednesday, March 25, 2009
  • 68. and Equinox Injector is created during Bundle.start(...) @Override public void start(BundleContext context) throws Exception { super.start(context); INSTANCE = this; injector = Guice.createInjector( new DomainmodelRuntimeModule(), new DomainmodelUiModule()); } Wednesday, March 25, 2009
  • 69. and Equinox ExecutableExtensions are created via IExecutableExtensionFactory <extension point=quot;org.eclipse.emf.ecore.extension_parserquot;> <parser class=quot;my.pack.DomainmodelExecutableExtensionFactory: org.eclipse.xtext.resource.XtextResourceFactoryquot; type=quot;dmodelquot;> </parser> </extension> Wednesday, March 25, 2009
  • 70. Composable Code Generator ‣ generator is composed of “fragments” Wednesday, March 25, 2009
  • 71. Composable Code Generator ‣ generator is composed of “fragments” ‣ fragments can contribute to: Wednesday, March 25, 2009
  • 72. Composable Code Generator ‣ generator is composed of “fragments” ‣ fragments can contribute to: ‣ Manifest.MF Wednesday, March 25, 2009
  • 73. Composable Code Generator ‣ generator is composed of “fragments” ‣ fragments can contribute to: ‣ Manifest.MF ‣ plugin.xml Wednesday, March 25, 2009
  • 74. Composable Code Generator ‣ generator is composed of “fragments” ‣ fragments can contribute to: ‣ Manifest.MF ‣ plugin.xml ‣ Guice modules Wednesday, March 25, 2009
  • 75. Composable Code Generator ‣ generator is composed of “fragments” ‣ fragments can contribute to: ‣ Manifest.MF ‣ plugin.xml ‣ Guice modules ‣ Add your own fragments Wednesday, March 25, 2009
  • 78. Galileo • Index Wednesday, March 25, 2009
  • 79. Galileo • Index • Enum Rules Wednesday, March 25, 2009
  • 80. Galileo • Index • Enum Rules • Bug fixing / Performance Tuning Wednesday, March 25, 2009
  • 81. Galileo • Index • Enum Rules • Bug fixing / Performance Tuning • Documentation Wednesday, March 25, 2009
  • 82. Galileo • Index • Enum Rules • Bug fixing / Performance Tuning • Documentation • Sugar (Wizards, Tutorials, etc.) Wednesday, March 25, 2009
  • 84. Post Galileo ‣ More UI features Wednesday, March 25, 2009
  • 85. Post Galileo ‣ More UI features ‣Basic Language Libraries Wednesday, March 25, 2009
  • 86. Post Galileo ‣ More UI features ‣Basic Language Libraries ‣“Eat your own dog food” continued Wednesday, March 25, 2009
  • 87. Thank you very much for listening Visit the project’s web site : www.xtext.org Copyright 2009 by itemis Wednesday, March 25, 2009

Editor's Notes