After discussed, we agreed new approach as bellow:

• Create simple expander by using Decorator/Wrapper to resolve item to canonical format: [provider]:[workspace]:[uuid] (see DEV-649 for more details). Then resolve that id in NodeWriter.
• Register the ComponentProvider to RestDispatchServlet, then inject it by @Context in NodeWriter, then get resolver by provider in resolving canonical format.

Once this is done, if reference expansion becomes automatic (for the new canonical format for example), then we will have to think about how to enable/disable reference expansion per endpoint. But we don't have to think about this for now, since all expansions have to be configured.