How to create a temporary layer with proper CRS with new FeatureType

In the code examples of the udig sdk you can find a nice snippet explaining how to create a temporary resource layer. One of those nice things which a user can decide whether to keep and save to shapefile or just trash it.

Let's see the code:

List featuresList = this is my list subset of a leyer or whatever
       String geomType = "MultiPolygon";
       Object[][] ob = new Object[featuresList.size()][2];
       for( int i = 0; i < featuresList.size(); i++ ) {

           ob[i][0] = featuresList.get(i).getGeometry();
           ob[i][1] = i;
       }
       FeatureType featureType = null;
       String typeName = "Macrobacini";
       try {
           featureType = DataUtilities.createType(typeName, "geom:" + geomType
                   + ",indice:java.lang.Integer");
           featureType = DataUtilities.createSubType(featureType, null, ApplicationGIS.getActiveMap().getViewportModel().getCRS());
       } catch (SchemaException e1) {
           e1.printStackTrace();
       }

       JGrassCatalogUtilities.removeMemoryServiceByTypeName(typeName);

       IGeoResource resource = CatalogPlugin.getDefault().getLocalCatalog()
               .createTemporaryResource(featureType);
       FeatureCollection coll = FeatureUtilities.createFeatures(featureType, ob);
       try {
           resource.resolve(FeatureStore.class, pm).addFeatures(coll);
       } catch (IOException e) {
           e.printStackTrace();
       }
       ApplicationGIS.addLayersToMap(ApplicationGIS.getActiveMap(), Collections
               .singletonList(resource), -1);

I added the createsubtype part because beeing the featuretype created from scratch, the CRS was missing and it interpreted my coordinates as lat/long, and therefore out of the admitted degrees.

The removeMemoryService part is needed because no two memorydatastores of the same name are admitted in the same catalog service, and a nice:
java.lang.UnsupportedOperationException: Schema modification not supported
is thrown whenever you force it to try nevertheless.

Therefore the service has to be removed before going on, which is done like that:

    public static synchronized void removeMemoryServiceByTypeName( String typeName ) {
        MemoryServiceImpl service = null;
        try {
            List< ? extends IResolve> members = CatalogPlugin.getDefault().getLocalCatalog()
                    .members(new NullProgressMonitor());
            for( IResolve resolve : members ) {
                if (resolve instanceof MemoryServiceImpl) {
                    if (URLUtils.urlEquals(resolve.getIdentifier(), MemoryServiceExtensionImpl.URL,
                            true)) {
                        service = (MemoryServiceImpl) resolve;
                        break;
                    }
                }
            }
            MemoryDataStore ds = service.resolve(MemoryDataStore.class, new NullProgressMonitor());
            if (Arrays.asList(ds.getTypeNames()).contains(typeName)) {
                CatalogPlugin.getDefault().getLocalCatalog().remove(service);
            }
        } catch (IOException e) {
            CatalogPlugin.log("Error finding services", e); //$NON-NLS-1$
        }
    }