public void intercept(InterceptorStack stack, ResourceMethod method, Object resourceInstance) throws InterceptionException { Consumes consumesAnnotation = method.getMethod().getAnnotation(Consumes.class); List<String> supported = Arrays.asList(consumesAnnotation.value()); String contentType = request.getContentType(); if (!supported.isEmpty() && !supported.contains(contentType)) { unsupported( String.format( "Request with media type [%s]. Expecting one of %s.", contentType, supported)); return; } try { Deserializer deserializer = deserializers.deserializerFor(contentType, container); if (deserializer == null) { unsupported( String.format("Unable to handle media type [%s]: no deserializer found.", contentType)); return; } Object[] deserialized = deserializer.deserialize(request.getInputStream(), method); Object[] parameters = methodInfo.getParameters(); for (int i = 0; i < deserialized.length; i++) { if (deserialized[i] != null) { parameters[i] = deserialized[i]; } } stack.next(method, resourceInstance); } catch (IOException e) { throw new InterceptionException(e); } }