In Which Format Rational Software Architect Designer Can Publish Report

Home » Modeling » M2T (model-to-text transformation) » Re: [JET] [RSA] How can I transform a Rational Software Architect model (.emx) using JET ?

Re: [JET] [RSA] How can I transform a Rational Software Architect model (.emx) using JET ? [message #25647] Tue, 10 July 2007 12:25 Eclipse User Originally posted by: merks.ca.ibm.com Nicolas, I'll redirect your question to the M2T newsgroup (it's on the "to" list of the reply, so you don't have to repost) since your syntax implies to me you are using JET2 syntax. Nicolas Toublanc wrote: > Hi, > > I'm trying to transform a RSA model using standard Eclipse > transformation. > > With an ecore model (.emf) generated from a RSA model (.emx), that's > working: > > "package mypackage; > <%-- import the ecore namespace --%> > <%@jet imports="org.eclipse.emf.ecore.*"%> > > <%-- import model helpers --%> > <%@jet imports="mypackage.util.JavaJetUtil"%> > /** > * DTO that represents '<c:get select="$currentClass/@name" />' entity. > * > */ > public class <c:get select="$currentClass/@name" /> ..." > > > > What should I do to make it work directly with my .emx model? > > > > Regards, > > Nicolas

Re: [JET] [RSA] How can I transform a Rational Software Architect model (.emx) using JET ? [message #25986 is a reply to message #25647] Wed, 11 July 2007 15:43  Paul Elder Messages: 849 Registered: July 2009 Senior Member Nicolas: Rational Software Architect .emx files are Ecore-based models. So, yes, JET can read .emx (and for that matter .uml/.uml2) models. Here are some tips for doing it... 1) Open plugin.xml on your JET transformation, switch the the Extensions tab, expand 'org.eclipse.jet.transform', click '(transform)', and set the modelLoader field to 'org.eclipse.jet.emf'. 2) The UML2 meta model is very large, and I find must users are not intimately familiar with the navigation features. JET has a special XPath enhancement to make life a little easier. An XPath step such as $parent/foo is interpreted as "the contents of the EReference named 'foo' on the object identified by $parent". But, if there is not 'foo' feature, JET will then attempt to find a contained class of $parent (i.e. something in eContents()) whose eClass name is 'foo'. So, the following are equivalent: /contents/nestedPackages/ownedTypes[@name = 'Person']/ownedAttributes[@name = 'address']/type/@name /Model/Package/Class[@name = 'Person']/Property[@name = 'address']/type/@name 3) JET doesn't cannot access stereotypes or steroetype properties. If you need, custom XPath functions could be created to access these. But, one word of caution. Our (IBMs) best practices on code generation recommends against writing code generators directly against UML models. The reasons: * Code generators (at least JET-based code generators) work best with models tuned to the structure of the output (you could call this an Intermediate Model). Things like 'flattened' package structures, and simplifications of UML constructs (have you ever looked at how UML handles documentation of an Element) are common. * Often, an Intermediate Model is developed 'bottom up' from the artifacts that need to be generated. In our experience, all but the most UML literate have trouble mapping code generation requirements directly to UML. Indeed, there are often multiple validate representations. To turn this around, this is the best practice we recommend: 1) Separate the concerns of code generation from the concern of representing the code generation abstractions to the user. 2) Create a code generator specific 'Intermediate Model' that represents concepts needed to produce the desired artifacts. 3) Build a JET transformation that consumes this model. Once done, you have a code generator that can be validated, and an abstraction of the code generator concepts (the intermediate model). For many users, this is enough! 4) (If necessary) Establish a UI representation of the code generator abstractions (as expressed in the intermediate model). Since you are thinking UML, this would be a mapping from UML constructs to the intermediate model. But, UML is not the only possibility. The ambious might choose to implement a domain specific language (DSL) using GMF. Or, a wizard might be the right tool. 5) Implement a mapping transformation from the UI representation to the intermediate model, and then chain in the JET transformation as the last step (so that user's do not have to see, or be aware of the JET transformation). Paul P.S. I've created a few FAQ articles for posterity: http://wiki.eclipse.org/JET_FAQ_Should_I_write_my_JET_code_g enerator_directly_against_UML2%3F http://wiki.eclipse.org/JET_FAQ_What_kind_of_input_model_can _JET_handle%3F http://wiki.eclipse.org/JET_FAQ_Can_JET_handle_UML_models_as _input%3F > Nicolas Toublanc wrote: >> Hi, >> >> I'm trying to transform a RSA model using standard Eclipse >> transformation. >> >> With an ecore model (.emf) generated from a RSA model (.emx), that's >> working: >> >> "package mypackage; >> <%-- import the ecore namespace --%> >> <%@jet imports="org.eclipse.emf.ecore.*"%> >> >> <%-- import model helpers --%> >> <%@jet imports="mypackage.util.JavaJetUtil"%> >> /** >> * DTO that represents '<c:get select="$currentClass/@name" />' entity. >> * >> */ >> public class <c:get select="$currentClass/@name" /> ..." >> >> >> >> What should I do to make it work directly with my .emx model? >> >> >> >> Regards, >> >> Nicolas

Re: [JET] [RSA] How can I transform a Rational Software Architect model (.emx) using JET ? [message #26236 is a reply to message #26112] Thu, 12 July 2007 12:06  Paul Elder Messages: 849 Registered: July 2009 Senior Member Nicolas: Some answers, clarifications and suggestions: Yes, you can use EMF or XML as an intermediate model. It will depend on what technology you use for the UML-to-intermediate-model mapping. Often, EMF is a good fit, as it can generate a Java API for the model, and has a rich meta-model. The EMF Model import from a RSA/RSM model lets you design you ECore model in UML (as an alternative to using Rose, XSD, annotated Java). There is a optional RSM UML profile (called ECore, I think) that contains stereotypes to let you refine things. But, at the most basic, a UML Class becomes an EClass, a UML Package becomes an EPackage, etc. [Apologies to the non IBM community, the rest of this message is specific to IBM product.] The Rational tools include components for creating such transformation chains. First, ensure that you have the optional 'Transformation Authoring' component installed. For creating JET transformations, there is a new project wizard "EMFT JET Project with Exemplar Authoring". If you have the 7.0.0.2 or later maintenance release, there is a tutorial in the Tutorial Gallery, under Watch and Learn called "Create model-to-text transformations with JET". For a 'mapping' transformation, there is a new project wizard "Model to Model Mapping Transformation Project". This starts the plug-in project wizard, to actually create a mapping transformation project, you must get to the third panel of the wizard (Templates), select "Plug-in with Transformation Mapping", and click Next. Mapping transformations use a graphical editor to specify the mapping. I'm not aware of a tutorial yet. Paul "Nicolas Toublanc" <n.toublanc@laposte.net> wrote in message news:f74jel$q2i$1@build.eclipse.org... > Thank you Paul for such a interesting answer. > > So, what about the intermediate model format ? I think it could be .emf or > .xml? > > Actually I'm able to generate the .emf model from my .emx file doing: > [new] > "EMF Model" > [Next] > Import from IBM Rational Software Modeler > model... > > But, how can I chain that transformation (UML2 to EMF) with the final > transformation (EMF to Java) ?

Re: [JET] [RSA] How can I transform a Rational Software Architect model (.emx) using JET ? [message #26276 is a reply to message #26236] Thu, 12 July 2007 12:27  Joe Toomey Messages: 79 Registered: July 2009 Member Paul Elder wrote: > > For creating JET transformations, there is a new project wizard "EMFT JET > Project with Exemplar Authoring". If you have the 7.0.0.2 or later > maintenance release, there is a tutorial in the Tutorial Gallery, under > Watch and Learn called "Create model-to-text transformations with JET". If you use the Rational tools and you do Jet template authoring, you owe it to yourself to try this feature. I have used it to author a couple of complicated patterns (after having written some by hand in the past), and it easily saved me a factor of 10 in time and effort. This feature rocks. Nice work Paul, Chris and the rest of your team! --Joe

Re: [JET] [RSA] How can I transform a Rational Software Architect model (.emx) using JET ? [message #29262 is a reply to message #26276] Thu, 26 July 2007 15:35 Eclipse User Originally posted by: n.toublanc.laposte.net Hi, Thanks again for your precious responses. I was some busy with others projects, so I'm just coming back to JET. I better understand the code generation philosophy, and I did some tries with RSA plug-ins. However, I have some troubles with them: -1- MODEL TO CODE generation (e.g. ".emf" to ".java" or ".xml" to ".java") (second step of generation chain) I tried the RSA plug-in "EMFT JET Project with Exemplar Authoring", using the tutorial. It's really interesting, because you can generate complex jet template from ".java" target, enabling ".java" (in this example) files generation from a XML model file. Now, I would like to do the same using EMF model instead of XML one. I'm not sure to really understand what is ".ecore" file. I can generate one form my ".xsd" file. So, if ".ecore" is the equivalent of ".xsd", what about the implementation (equivalent of ".xml" file) : ".ecore" too? How to use it with authoring? -2- MODEL TO MODEL generation (e.g. ".emx" to ".emf" or ".emx" to ".xml") (first step of generation chain) Now that I've my expected intermediate model, I would like to generate it from my UML model. I tried to create a "Model to Model Mapping Transformation Project". The visual user interface looks powerful, so I would like to generate my intermediate model with this tool. But, how to use ".emx" in input model? Then, how to test or run this plug-in? Nicolas

Re: [JET] [RSA] How can I transform a Rational Software Architect model (.emx) using JET ? [message #30346 is a reply to message #29262] Tue, 07 August 2007 16:09  Paul Elder Messages: 849 Registered: July 2009 Senior Member Nicolas: Sorry for the slow response. A special project and summer vacation mean I have less time for the list this month. Answers below: > -1- MODEL TO CODE generation (e.g. ".emf" to ".java" or ".xml" to ".java") > (second step of generation chain) > > Now, I would like to do the same using EMF model instead of XML one. I'm > not sure to really understand what is ".ecore" file. I can generate one > form my ".xsd" file. So, if ".ecore" is the equivalent of ".xsd", what > about the implementation (equivalent of ".xml" file) : ".ecore" too? How > to use it with authoring? > The file type bound to an Ecore model is controlled by .genmodel file associated with the .ecore file when you create a an EMF project. Each EPackage has a property All > Prefix. The associated file extension is the lower case of this value. Also, once you have generated the Model code, you can change (or add additional file extension assosicates) by opening plugin.xml in the EMF project, and modifying the org.eclipse.emf.ecore.extension_parser <extension point="org.eclipse.emf.ecore.extension_parser"> <parser type="fileExtensionYouWant" class="a.value.you.should.not.change" /> </extension> You can have multiple <parser> elements, if you like. > -2- MODEL TO MODEL generation (e.g. ".emx" to ".emf" or ".emx" to ".xml") > (first step of generation chain) > > Now that I've my expected intermediate model, I would like to generate it > from my UML model. > > I tried to create a "Model to Model Mapping Transformation Project". The > visual user interface looks powerful, so I would like to generate my > intermediate model with this tool. But, how to use ".emx" in input model? > Then, how to test or run this plug-in? The labels on the New Transformation Mapping page are a little misleading. While the buttons say "Add Model", the really mean "Add Meta-Model". An .emx file confirms to the UML2 meta-model. If you click the Add Model button (beside the Input Models box), then click "Browse Registered Packages", and type *uml2 (to filter the list), you will see http://www.eclipse.org/uml2/2.0.0/UML - select that. Also, if your UML model uses profiles, you can select, those, too. Finally, for more information on the Rational products, you might consider looking that the IBM Rational forums, and web pages: http://www.ibm.com/developerworks/forums/dw_forum.jsp?forum= 787&cat=24 and the web page: http://www.ibm.com/developerworks/rational/products/patterns olutions/assets.html?S_TACT=105AGX15&S_CMP=LP Paul

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In Which Format Rational Software Architect Designer Can Publish Report

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