Endpoint to update a single file's metadata (non-working start point)

Files.java

 
    @PUT
    @Path("{id}/metadata")
    public Response updateFileMetadata(
                    @PathParam("id") Long fileToUpdateId,
                    String jsonData
                    ){
    
        // -------------------------------------
        // (1) Get the user from the API key
        // -------------------------------------
        User authUser;
        try {
            authUser = this.findUserOrDie();
        } catch (AbstractApiBean.WrappedResponse ex) {
            return error(Response.Status.FORBIDDEN, 
                    ResourceBundle.getBundle("Bundle").getString("file.addreplace.error.auth")
                    );
        }

        // -------------------------------------
        // (2) Check/Parse the JSON
        // -------------------------------------        
        if (jsonData == null){
            logger.log(Level.SEVERE, "jsonData is null");
            return error( Response.Status.BAD_REQUEST, "No JSON data");
        }
        JsonObject jsonObj = new Gson().fromJson(jsonData, JsonObject.class);

         // (2d) Load up optional params via JSON
        //  - Will skip extra attributes which includes fileToReplaceId and forceReplace
        //---------------------------------------
        OptionalFileParams optionalFileParams = null;
        try {
            optionalFileParams = new OptionalFileParams(jsonData);
        } catch (DataFileTagException ex) {
            return error( Response.Status.BAD_REQUEST, ex.getMessage());            
        }
        
        DataverseRequest dvRequest = createDataverseRequest(authUser);

        UpdateFileMetadataHelper updateFileMetadataHelper = new UpdateFileMetadataHelper(dvRequest,
                                                this.datasetService,
                                                this.fileService,
                                                this.permissionSvc,
                                                this.commandEngine,
                                                this.systemConfig);

        updateFileMetadataHelper.updateFileMetadata(fileToUpdateId, optionalFileParams);
        
        if (updateFileMetadataHelper.hasError()){
            msg("yes, has error");          
            return error(updateFileMetadataHelper.getHttpErrorCode(), updateFileMetadataHelper.getErrorMessagesAsString("\n"));
        
        }else{
            msg("no error");
            String successMsg = ResourceBundle.getBundle("Bundle").getString("file.addreplace.success.replace");        

            msgt("as String: " + updateFileMetadataHelper.getSuccessResult());
            return ok(successMsg,
                    updateFileMetadataHelper.getSuccessResultAsJsonObjectBuilder());
        }
    } // end: updateFileMetadata