[news.eclipse.tools.emf] Re: Model Migration

[Ömer Yildiz <oemer.yildiz@xxxxxxxxxxxxxxxx>]

Well, no matter what I do, nothing affects the serialization. I stepped 
through the code a bit... Ecore2XMLExtendedMetaData is definitely used 
to load/save the resource, but the output is always the old model version.

The code is essentially the same as written in the recipe:

"UiPackage" is the *old* model.
"UIModelPackage" is the *new* model.

"TARGET_ECORE" points to the *new* model's .ecore file
"MODEL_MAPPING" points to the .ecore2xml file

public Resource createResource(URI uri) {
  ...
  defaultLoadOptions.put(XMLResource.OPTION_EXTENDED_META_DATA,
     getExtendedMetaData());
  ...
  resource.getDefaultSaveOptions().put(
     XMLResource.OPTION_EXTENDED_META_DATA, Boolean.TRUE);
}

private ExtendedMetaData getExtendedMetaData() {
  ...
  rs.getPackageRegistry().put(UiPackage.eNS_URI,
      UIModelPackage.eINSTANCE);
  rs.getPackageRegistry().put(TARGET_ECORE,					 
UIModelPackage.eINSTANCE);

  ...
  ecore2xmlRegistry.put(UiPackage.eNS_URI, EcoreUtil
     .getObjectByType(rs.getResource(
        URI.createURI(MODEL_MAPPING),true).getContents(),
        Ecore2XMLPackage.Literals.XML_MAP));

  ...
}


Ed Merks schrieb:
> Ömer,
>
> It sounds to me like this is liable to do the reverse mapping.  What 
> happens if you don't do that?  You can use this option mapped to 
> Boolean.TRUE for save if you need the option to produce a 
> schema-conforming serialization...
>
>
> Ömer Yildiz wrote:
> > I forgot to mention, that I've already set the same value for 
> > OPTION_EXTENDED_META_DATA in the default save options.
> >
> >
> > Ömer Yildiz schrieb:
> > > Hello,
> > >
> > > i've tried to migrate an older version of my model using your recipe, 
> > > but without success. After loading the instance of an old model, I 
> > > immediately called resource.save(), assuming that EMF would serialize 
> > > it using the newer version of my model.
> > >
> > > Any hints?
> > >
> > > Best regards,
> > > Ömer yildiz
> > >
> > > Mike Gering schrieb:
> > > > Ed,
> > > >
> > > > Thanks for prompt and excellent advice, as always!
> > > >
> > > > Here is a revised code fragment:
> > > >
> > > > public class RulesResourceFactoryImpl extends XMIResourceFactoryImpl {
> > > >
> > > >     public static final String RULES_100_NS_URI = 
> > > > "http://www.ibm.com/vce/1.0.0/rules";;
> > > >     public static final String RULES_PLATFORM_URI = 
> > > > "platform:/plugin/com.ibm.adt.vce.rules.model/model/Rules.ecore";
> > > >     public static final String RULES_100_PLATFORM_URI = 
> > > > "platform:/plugin/com.ibm.adt.vce.rules.model/model/Rules100_2_Rules.ecore2xml"; 
> > > >
> > > >
> > > >     private ExtendedMetaData extendedMetaData;
> > > >         /* (non-Javadoc)
> > > >      * @see 
> > > > org.eclipse.emf.ecore.resource.impl.ResourceFactoryImpl#createResource(org.eclipse.emf.common.util.URI) 
> > > >
> > > >      */
> > > >     public Resource createResource(URI uri) {
> > > >         XMIResource resource = (XMIResource) super.createResource(uri);
> > > >
> > > >         Map defaultLoadOptions = resource.getDefaultLoadOptions();
> > > >         defaultLoadOptions.put(XMLResource.OPTION_EXTENDED_META_DATA,
> > > >                 getExtendedMetaData());
> > > >         
> > > > defaultLoadOptions.put(XMLResource.OPTION_RECORD_UNKNOWN_FEATURE,
> > > >                 Boolean.TRUE);
> > > >         defaultLoadOptions.put(XMLResource.OPTION_RESOURCE_HANDLER,
> > > >                 new RulesResourceHandler());
> > > >         return resource;
> > > >     }
> > > >
> > > >     private ExtendedMetaData getExtendedMetaData() {
> > > >         if(extendedMetaData == null) {
> > > >             ResourceSet resourceSet = new ResourceSetImpl();
> > > >             EPackage.Registry ePackageRegistry = 
> > > > resourceSet.getPackageRegistry();
> > > >             ePackageRegistry.put(RULES_100_NS_URI, 
> > > > RulesPackage.eINSTANCE);
> > > >             ePackageRegistry.put(RULES_PLATFORM_URI, 
> > > > RulesPackage.eINSTANCE);
> > > >             resourceSet.setPackageRegistry(ePackageRegistry);
> > > >             Ecore2XMLRegistry ecore2xmlRegistry = new 
> > > > Ecore2XMLRegistryImpl(Ecore2XMLRegistry.INSTANCE);
> > > >             ecore2xmlRegistry.put(RULES_100_NS_URI,
> > > >                     EcoreUtil.getObjectByType(
> > > >                             
> > > > resourceSet.getResource(URI.createURI(RULES_100_PLATFORM_URI),
> > > >                                     true).getContents(),
> > > >                                     
> > > > Ecore2XMLPackage.Literals.XML_MAP));
> > > >             extendedMetaData = new 
> > > > Ecore2XMLExtendedMetaData(EPackage.Registry.INSTANCE, 
> > > > ecore2xmlRegistry);                   }
> > > >         return extendedMetaData;
> > > >     }
> > > > }
> > > >
> > > > If this passes muster, I can consider making a recipe of it. I found it
> > > > distressingly hard to get this far by reading the various newsgroup 
> > > > articles and
> > > > the EclipseCon 2006 slides.
> > > >
> > > > Thanks again,
> > > > Mike