public <T> T findOne(URI uri, Class<T> targetClass) {
Assert.state(uri != null, "uri must be set to use this method");
try {
return restOperations.getForObject(uri, targetClass);
// TODO check this exception translation and centralize.
} catch (HttpClientErrorException clientError) {
if (clientError.getStatusCode() == HttpStatus.NOT_FOUND) {
throw new DocumentRetrievalFailureException(uri.getPath());
}
throw new CouchUsageException(clientError);
} catch (HttpServerErrorException serverError) {
throw new CouchServerResourceUsageException(serverError);
} catch (RestClientException otherError) {
throw new UncategorizedCouchDataAccessException(otherError);
}
}
