@Nullable @Named in GAE / Android Sample

android, google-app-engine, google-cloud-endpoints

Solution

For passing parameters from client side while sending a query request through cloud endpoints, you need to add provision for setting parameters. To send the required parameter from android , the class where you would define the REST Path and method type, should include an option to the set cursor and limit. For example for the String cursorstring :

@com.google.api.client.util.Key
      private String cursorstring;

      public String getCursorstring() {
        return cursorstring;
      }

      public ListPlace setCursorstring(String cursorstring) {
        this.cursorstring = cursorstring;
        return this;
      }

Finally while calling the endpoint method from your android code, you should pass a value using the setCursorstring, which will be something like:

CollectionResponsePlace placesResponse = endpoint.listPlace().setCursorstring("yourcursorstring").execute();

Problem

I'm trying to work on the sample GAE / Android app. There is Place Entity. In generated PlaceEndpoint class there is a method: ``` @ApiMethod(name = "listGame") public CollectionResponse<Place> listPlace( @Nullable @Named("cursor") String cursorString, @Nullable @Named("limit") Integer limit) { EntityManager mgr = null; Cursor cursor = null; List<Game> execute = null; try { mgr = getEntityManager(); Query query = mgr.createQuery("select from Place as Place"); if (cursorString != null && cursorString != "") { cursor = Cursor.fromWebSafeString(cursorString); query.setHint(JPACursorHelper.CURSOR_HINT, cursor); } if (limit != null) { query.setFirstResult(0); query.setMaxResults(limit); } execute = (List<Game>) query.getResultList(); cursor = JPACursorHelper.getCursor(execute); if (cursor != null) cursorString = cursor.toWebSafeString(); // Tight loop for fetching all entities from datastore and accomodate // for lazy fetch. for (Game obj : execute) ; } finally { mgr.close(); } return CollectionResponse.<Game> builder().setItems(execute) .setNextPageToken(cursorString).build(); } ``` As I understand `cursor` and `limit` all optional params. However I can't figure out how to pass them using `Placeednpoint` class on the client side: ``` Placeendpoint.Builder builder = new Placeendpoint.Builder(AndroidHttp.newCompatibleTransport(), new JacksonFactory(), null); builder = CloudEndpointUtils.updateBuilder(builder); Placeendpoint endpoint = builder.build(); try { CollectionResponsePlace placesResponse = endpoint.listPlace().execute(); } catch (Exception e) { e.printStackTrace(); ``` Normally, when params are not nullable I would pass them in endpoint.listPlace() method. But when params are nullable, client side app doesn't see alternative constructor, that would accept params. How am I supposed to pass them then?

Original source