how to validate if body request schema is same as in swagger api?

Question

i need to create a controller that expose checkCustomer service that recive a body of Customer Object and the function check Customer should check if the json schema that i got in the body request is the same like in swagger api documentation and return success or fail i can't find how to do this checking please someone help here is some of my code that i tried :

 @Service
 public class CustomerService implements CustomerServiceInter {

  @Override
  public String checkCustomer(Customer customer) throws JsonProcessingException {
    OpenAPI openAPI = new OpenAPI();
    MessageResolver messageResolver = new MessageResolver();
    SchemaValidator schemaValidator = new SchemaValidator(openAPI, messageResolver);
    ObjectWriter ow = new ObjectMapper().writer().withDefaultPrettyPrinter();
    String json = ow.writeValueAsString(customer);
    ValidationReport validate = schemaValidator.validate("customer", json , "prefix");
    System.out.println(validate);

    return null;
}