CustomerValidator.java

package validators;

import com.avaje.ebean.Model;
import models.CustomerModel;

public class CustomerValidator implements ModelValidator {
  public CustomerValidator() {
    super();
  }

  @Override
  public ValidationResult validateModel(Model modelObject) {
    ValidationResult result = new ValidationResult();
    CustomerModel customerModel = (CustomerModel) modelObject;

    if ( customerModel.name== null || customerModel.name.isEmpty()){
      result.addValidationError(new ValidationError(ValidationErrorType.CUSTOMER_NAME_MISSING));
    }

    return result;
  }

}