content: /*
   * Copyright 1999-2018 Alibaba Group Holding Ltd.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package com.alibaba.nacos.common.utils;
  
  import com.alibaba.nacos.api.common.Constants;
  
  /**
   * namespace(tenant) util. Because config and naming treat namespace(tenant) differently, this tool class can only be
   * used by the config module.
   *
   * @author klw(213539 @ qq.com)
   * @date 2020/10/12 17:56
   */
  public class NamespaceUtil {
      
      private NamespaceUtil() {
      }
      
      /**
       * public id，默认值为 "public".
       */
      public static String namespaceDefaultId = Constants.DEFAULT_NAMESPACE_ID;
      
      /**
       * Treat the namespace(tenant) parameters with values of empty string as "public".
       *
       * @param tenant namespace(tenant) id
       * @return java.lang.String A namespace(tenant) string processed
       */
      public static String processNamespaceParameter(String tenant) {
          if (isNeedTransferNamespace(tenant)) {
              return getNamespaceDefaultId();
          }
          return tenant.trim();
      }
      
      public static boolean isNeedTransferNamespace(String tenant) {
          return StringUtils.isBlank(tenant);
      }
      
      /**
       * Set default namespace id. Invoke settings at system startup.
       *
       * @param namespaceDefaultId 参数不能为 null
       */
      public static void setNamespaceDefaultId(String namespaceDefaultId) {
          NamespaceUtil.namespaceDefaultId = namespaceDefaultId;
      }
      
      /**
       * Get default namespace id.
       *
       * @return namespace id
       */
      public static String getNamespaceDefaultId() {
          return NamespaceUtil.namespaceDefaultId;
      }
      
      /**
       * Judge whether is default namespaceId.
       *
       * @param namespaceId to check namespaceId
       * @return {@code true} if equals default namespaceId, otherwise {@code false}.
       */
      public static boolean isDefaultNamespaceId(String namespaceId) {
          return StringUtils.equals(namespaceId, getNamespaceDefaultId());
      }
  }
  