Java – spring HATEOAS resourcesupport – > domain object

When using service objects, we use the toresource method to convert them into resources, and on the way back (publishing the resource representation from the client to the server), how to convert the representation back to the domain object?

I want to construct the book (@ entity) class from the bookresource (extended resourcesupport) class

@RequestMapping(path="/",method = RequestMethod.POST,produces="application/vnd.company.app.book-v1+hal+json")
    public ResponseEntity<?> addBook(@RequestBody BookResource bookResource) {
        //What to do here?
    }

Solution

Your bookresource should extend resource instead of resourcesupport

public class BookResource extends Resource<Book> {

    public BookResource(Book content,Link... links) {
        super(content,links);
    }

}

In this way, you can get the getcontent () method for free, that is, "return the underlying entity"