The document describes using MDWorkbench to generate C++ code from an XML system description file. The goals are to generate header and source code files for each "Controllable" element in the XML file. MDWorkbench will be used to define the metamodel, model, rules, and templates to generate the C++ code. The solution involves importing the metamodel, browsing the model, writing rulesets and templates to generate the header and source files for each controllable, and then running the generator to produce the output files.

1. Ander Zubizarreta 9/1/2009DSLto C++Sysdefcodegenerationusing MDWorkbench

2. ProblemDefinitionWehave a source XML filedescribing a system, accordingto a XML SchemametamodelSystem has manyelements of thetypeControllableThegoalistogeneratea cppimplementationforeachControllabletypeelement

3. ProblemdefinitionXSD

4. ProblemDefinitionSourceXML fileThe XML file describes a systemThesystem has manycontrollablesEachcontrollable has inputs, outputs, params, faults…Target.h and .cppfileforeachControllableThe generation of the .H file is straightforwardThe generation of the .CPP file comprises several RuleSetsLocals:For each input/output/param/fault/timer define a local of that typedoInit\\ initialize each local variable\\ by getting its value (using mappings in wtsl)WHY IS USED?We’ll use MDWorkbench forthatpurpose

5. MDWorkbenchMDWorkbench is a model-driven engineering development environment to build:Source code and text generatorsWord documentationModel transformersEclipse-based IDEJava code may be used in MDWorkbench projectsDeveloped by Sodius SAS

6. MDWorkbench

7. SolutionMetamodelC++ codeModelRulesTemplates

8. StepsImportthemetamodelto MDWorkbenchBrowsethemodelusing MDWorkbenchCreatetherulesets and templatesforcodegenerationRunthegenerator

9. 1. Importing a metamodelMDWorkbench nativelyallowstoworkwithEcore, Relationalor UML modelsNew metamodels can beimported, allowingtoworkwithdifferentkind of modelsImporting a metamodelconsists in creatingan Eclipse pluginwhichwillbeusedby MDWorkbenchOurmetamodelisdefinedusing XML Schema

10. 1. Importing a metamodel1342Select the specific file

11. 1. Importing a metamodelCreatingPluginWenowhavetoexportthecreatedproject as a pluginWhenwerestart MDWorkbench the new metamodelwillbeavailable

12. 2. BrowsingthemodelOnce themetamodel has beenimportedwe can open themodel in MDWorkbench and browseit

13. 3. WritingthegeneratorsRulesets, texttemplates and scripts can beusedtogeneratecodeRulesets are written in MQLTemplatesarwritten in TGLScripts can bewritten in MQL, TGL or JavaFirst sketch of thesolution:Twocodetemplates: onefor .h files and otherfor .cpp filesA ruleset: toapplythetemplatestoeachcontrollable in themodelScripts: we’llcalltosomescrpitsfromthetemplatestogettheelements of thecontrollable

14. 3. WritingthegeneratorsRuleset:cppGenerator.mqrTemplates:hGen.tgtcppGen.tgtScripts:doGetInitializations()doGetLocalsDefinitions()

15. 3. WritingthegeneratorshGen.tgtRefer to “20081202_MDWorkbench_Tool.ppt” for a detailed overview of Templates

16. 3. WritingthegeneratorscppGen.Tgt (callto script)Refer to “20081202_MDWorkbench_Tool.ppt” for a detailed overview of Templates

17. 3. WritingthegeneratorsScriptsRefer to “20081202_MDWorkbench_Tool.ppt” for a detailed overview of Scripts

18. 3. WritingthegeneratorsRulesetcppGeneration.mqr: appliesthetexttemplatestoeachcontrollableRefer to “20081202_MDWorkbench_Tool.ppt”for a detailed overview of Rulesets

19. 4. RunningthegeneratorRunconfigurationSelecttheruleset as themainelementwewanttorun and the input model

20. 4. RunningthegeneratorOutputConsole output:Report:

21. 4. RunningthegeneratorOutputPart of a generated .cppfile: