ClassCastException when get my service

Question

* I create a Nuxeo project through Nuxeo IDE.
* I start my server and add my project into the deployment configuration
* I synchronize

Problem:
When I my code try to fetch the service I have a ClassCastException on the adapter.cast().

Benjamin_Jalon1 · Accepted Answer

The problem was coming from a fact that I removed the Nuxeo Nature to my project and I add it after.
But In my project contains Seam component. So my code was deployed twice => 2 versions of all classes of my project.

So I had to remove again the Nuxeo Nature to my project and add Nuxeo Seam Project Nature.