本文整理了Java中io.helidon.config.Config.asOptionalList()方法的一些代码示例，展示了Config.asOptionalList()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Config.asOptionalList()方法的具体详情如下：
包路径：io.helidon.config.Config
类名称：Config
方法名：asOptionalList

Config.asOptionalList介绍

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代码示例

代码示例来源：origin: io.helidon.security/helidon-security-abac-policy

/**
 * Update this builder from configuration.
 *
 * @param config configuration instance located on {@link PolicyValidatorService#configKey()}
 * @return updated builder instance
 */
public Builder from(Config config) {
  this.config = config;
  config.get("validators").asOptionalList(Config.class).ifPresent(configs -> {
    for (Config validatorConfig : configs) {
      OptionalHelper.from(validatorConfig.get("class").asOptionalString())
          .ifPresentOrElse(clazz -> {
            //attempt to instantiate
            addExecutor(instantiate(clazz));
          }, () -> {
            throw new SecurityException(
                "validators key may only contain an array of class to class names, at key: "
                    + validatorConfig.key());
          });
    }
  });
  return this;
}

代码示例来源：origin: io.helidon.security/helidon-security-integration-webserver

Builder builder = builder(defaults);
OptionalHelper.from(config.get(KEY_ROLES_ALLOWED).asOptionalList(String.class))
    .ifPresentOrElse(builder::rolesAllowed,
             () -> defaults.rolesAllowed.ifPresent(builder::rolesAllowed));
OptionalHelper.from(config.get(KEY_AUDIT_MESSAGE_FORMAT).value()).or(() -> defaults.auditMessageFormat).asOptional()
    .ifPresent(builder::auditMessageFormat);
config.get(KEY_QUERY_PARAM_HANDLERS).asOptionalList(QueryParamHandler.class)
    .ifPresent(it -> it.forEach(builder::addQueryParamHandler));