Not getting custom objects from registration using model provider and ObjectModelSerDes

I want to know how much objects and resources are there with a particular client when it is getting registered. In register callback of Device Registration Interface I’ve written below code:

                        final ObjectModelSerDes serializer;
                        final LwM2mModelProvider modelProvider;
			serializer = new ObjectModelSerDes();
			modelProvider = myserver.getModelProvider();
			LwM2mModel model = modelProvider.getObjectModel(null);
			byte[] test12 = serializer.bSerialize(model.getObjectModels());
			System.out.println("models");
			String str = new String(test12, "UTF-8");
			System.out.println(str);

In output I’m getting details of Default object models (0 to 7) and I’m not getting detail about my custom object models. I tried understanding ObjectSpecServlet.java in leshan-server-demo code and ended up with above logic.

[sbernard31]

Once you have the objectLink you can retrieve the corresponding object model using server.getModelProvider() but this will works only to know which object are supported. (That’s here where we could provide a better API)

To know resources supported, I believe the only way with LWM2M is to use discover request on each object… 😕

[sbernard31]

@NayangiriGoswamiGit I created a PR #657 to support object versioning. There is now new utility functions on Registration to get supported version of an object for a registration. See https://github.com/eclipse/leshan/pull/657/files#diff-cd77b361911b907b7b59f79409eeb341R318

And a LwM2mModelProvider which return only supported objects. See https://github.com/eclipse/leshan/pull/657/files#diff-5a532c30888fe3d248b10f6ffd3eef73R27