private IScope getScopeFor_XXX (EObject context)
    {
        EClass type =  XXX
        Resource resource = context.eResource ();
        IResourceDescription description = getDescription (resource);

        IContainer.Manager manager = getResourceServiceProvider (resource).getContainerManager ();
        IContainer container = manager.getContainer (description, index);
        IScope globalScope = new GlobalScope (container, type);
        return new LocalScope (nameProvider, description, type, context, globalScope);
    }

    private class GlobalScope implements IScope
    {
        private final IContainer container;
        private final EClass     type;

        public GlobalScope (IContainer container, EClass type)
        {
            this.container = container;
            this.type = type;
        }

        @Override
        public IEObjectDescription getContentByName (String name)
        {
            Iterable<IEObjectDescription> found = container.findAllEObjects (type, name);
            Iterator<IEObjectDescription> it = found.iterator ();
            if (it.hasNext ()) return it.next ();
            return null;
        }

        ...
}