How to parse HTTP 400 response using Jersey Client into a Java Class?

Question

I am using Jersey client to interact with the Facebook Graph API. The Jersey client helps me parse JSON responses into Java classes.

Sometimes Facebook sends a 400 response along with useful information about the reason for the 400 response. For example: {"error":{"message":"Error validating application. Cannot get application info due to a system error.","type":"OAuthException","code":101}}

Jersey simply throws an exception and eats up the useful part of the response :-(

How do I get it to parse the JSON into a Java class with fields corresponding to the useful error information?

Answer 1

this code works:

try {
  User user = user_target
      .request()
      .get(User.class);
  System.out.println(user);
} catch (ClientErrorException primary_exception) {
  try {
    ErrorResponse error_response = primary_exception.getResponse().readEntity(ErrorResponse.class);
    System.out.println(error_response);
  } catch (ClientErrorException secondary_exception) {
    System.err.println("Secondary Exception: " + secondary_exception.getMessage());
    throw new ThisAppException("Secondary Exception", secondary_exception);
  }
}