Java 类io.dropwizard.validation.valuehandling.OptionalValidatedValueUnwrapper 实例源码

@Override
public RestlerConfig getConfiguration()  {
    ObjectMapper objectMapper = Jackson.newObjectMapper();

    ValidatorFactory validatorFactory = Validation
            .byProvider(HibernateValidator.class)
            .configure()
            .addValidatedValueHandler(new OptionalValidatedValueUnwrapper())
            .buildValidatorFactory();


    final ConfigurationFactory<RestlerConfig> configurationFactory =
            new DefaultConfigurationFactoryFactory<RestlerConfig>().create(RestlerConfig.class, validatorFactory.getValidator(), objectMapper, "dw");

    try {
        return configurationFactory.build(new FileConfigurationSourceProvider(), TEST_CONFIG_FILE);
    } catch (Exception e) {
        throw new RuntimeException("Cannot get test configuration", e);
    }
}

/**
 * Parses the given configuration file and returns a configuration object.
 *
 * @param configurationFileName The name of the configuration file.
 * @return A configuration object.
 * @throws IOException The IO error that contains detail information.
 * @throws ConfigurationException The configuration error that contains detail information.
 */
public static ApiConfiguration parse(String configurationFileName)
  throws IOException, ConfigurationException {
  if (StringUtils.isBlank(configurationFileName)) {
    throw new IllegalArgumentException("Configuration file cannot be blank");
  }

  ObjectMapper objectMapper = null;
  if (configurationFileName.endsWith("yml") || configurationFileName.endsWith("yaml")) {
    objectMapper = Jackson.newObjectMapper(new YAMLFactory());
  } else if (configurationFileName.endsWith("json")) {
    objectMapper = Jackson.newObjectMapper(new JsonFactory());
  } else {
    throw new IllegalArgumentException("Unrecognized configuration file type");
  }

  ValidatorFactory validatorFactory = Validation
      .byProvider(HibernateValidator.class)
      .configure()
      .addValidatedValueHandler(new OptionalValidatedValueUnwrapper())
      .buildValidatorFactory();

  final ConfigurationFactory<ApiConfiguration> configurationFactory =
      new DefaultConfigurationFactoryFactory<ApiConfiguration>()
        .create(ApiConfiguration.class, validatorFactory.getValidator(), objectMapper, "dw");

  final File file = new File(configurationFileName);
  if (!file.exists()) {
    throw new FileNotFoundException("Configuration file " + configurationFileName + " not found");
  }

  return configurationFactory.build(file);
}