Using this class structure

public class Customer{
    private String name;
    private String store;
    private T details;
}
public class details{
    private String dob;
    private boolean validated;
}

It works when JSON is

{
  "name": "John Smith",
  "store": "Walmart",
  "details": {
    "dob": "1900/01/01",
    "validated": true
  }

}

But when given JSON responses below it fails.

{
  "name": "John Smith",
  "store": "Walmart",
  "details": [
    "Failed customer does not exist in the system", "Please contact administrator"
  ]
}

Is there anyway in Jackson mapper to handle these scenarios? If details is provided as pojo then write as such otherwise write details as a string value. I define my mapper as such

private static final ObjectMapper Mapper = new ObjectMapper() {{
    setSerializationInclusion(JsonInclude.Include.NON_NULL);
    setDateFormat(new SimpleDateFormat("MM/dd/yyyy HH:mm:ss z", Locale.US));
    configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
}};