[e4-dev] Model changes require removing deltas.xml

[Paul Webster <pwebster@xxxxxxxxxxxxxxxxxxx>]

We've checked in model changes:
Bug 320171 - 
      [Model] Use real Java-References in the Binding-Model-Elements
https://bugs.eclipse.org/bugs/show_bug.cgi?id=320171

This changes binding context references to references (instead of simple IDs to be resolved by the runtime system).

We don't currently have an "upgrade old model" ability.  For something XML resource based, I did find a code snippet that can be used to load an old model and then allow you to deal with attributes that are now "extra".  Just for posterity, here's an example that can migrate an old MBindingTable id to a context reference:


// set up the load option:
set.getLoadOptions().put(XMLResource.OPTION_RECORD_UNKNOWN_FEATURE,
    Boolean.TRUE);

// sample upgrade function:
private void processModelUpgrades(Resource resource) {
    if (!(resource instanceof XMLResource)) {
        return;
    }
    Map<EObject, AnyType> extensions = ((XMLResource) resource)
            .getEObjectToExtensionMap();
    MApplication application = (MApplication) resource.getContents().get(0);
    TreeIterator<EObject> it = EcoreUtil.getAllContents(resource
            .getContents());
    while (it.hasNext()) {
        EObject obj = it.next();
        if (obj instanceof MBindingTable) {
            AnyType anyType = extensions.get(obj);
            for (Entry feature : anyType.getAnyAttribute()) {
                if (feature.getEStructuralFeature().getName()
                        .equals("bindingContextId")) {
                    MBindingContext root = getBindingContext(application,
                            (String) feature.getValue());
                    ((MBindingTable) obj).setBindingContext(root);
                    System.out.println("set " + root);
                }
            }
        }
    }
}

-- 
Paul Webster
Hi floor.  Make me a sammich! - GIR