content: /*
   * Copyright 1999-2023 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.core.namespace.injector;
  
  import com.alibaba.nacos.api.model.response.Namespace;
  
  import java.util.HashSet;
  import java.util.Set;
  
  /**
   * Holder of namespace detail injector.
   *
   * @author xiweng.yy
   */
  public class NamespaceDetailInjectorHolder {
      
      private static final NamespaceDetailInjectorHolder INSTANCE = new NamespaceDetailInjectorHolder();
      
      private final Set<AbstractNamespaceDetailInjector> namespaceDetailInjectors;
      
      private NamespaceDetailInjectorHolder() {
          this.namespaceDetailInjectors = new HashSet<>();
      }
      
      public static NamespaceDetailInjectorHolder getInstance() {
          return INSTANCE;
      }
      
      public void registerInjector(AbstractNamespaceDetailInjector injector) {
          this.namespaceDetailInjectors.add(injector);
      }
      
      /**
       * Inject detail from all injectors.
       *
       * @param namespace namespace
       */
      public void injectDetail(Namespace namespace) {
          for (AbstractNamespaceDetailInjector each : this.namespaceDetailInjectors) {
              each.injectDetail(namespace);
          }
      }
  }
  