content: // Licensed to the Apache Software Foundation (ASF) under one
  // or more contributor license agreements.  See the NOTICE file
  // distributed with this work for additional information
  // regarding copyright ownership.  The ASF licenses this file
  // to you 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 org.apache.cloudstack.network.topology;
  
  import java.util.Hashtable;
  
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.beans.factory.annotation.Qualifier;
  
  import com.cloud.dc.DataCenter;
  import com.cloud.dc.DataCenter.NetworkType;
  
  public class NetworkTopologyContext {
  
      private final Hashtable<NetworkType, NetworkTopology> _flyweight = new Hashtable<DataCenter.NetworkType, NetworkTopology>();;
  
      @Autowired
      @Qualifier("basicNetworkTopology")
      private BasicNetworkTopology _basicNetworkTopology;
  
      @Autowired
      @Qualifier("advancedNetworkTopology")
      private AdvancedNetworkTopology _advancedNetworkTopology;
  
      public void init() {
          _flyweight.put(NetworkType.Basic, _basicNetworkTopology);
          _flyweight.put(NetworkType.Advanced, _advancedNetworkTopology);
      }
  
      public NetworkTopology retrieveNetworkTopology(final DataCenter dc) {
          if (!_flyweight.containsKey(dc.getNetworkType())) {
              throw new IllegalArgumentException("The given type cannot be related to a NetworkTopology implementation. "
                      + "Please, give a correct type.");
          }
          return _flyweight.get(dc.getNetworkType());
      }
  
      /**
       * Method used for tests purpose only. Please do not use it to set the AdvanceNetworkTopology and it is managed by Spring.
       * @param advancedNetworkTopology
       */
      public void setAdvancedNetworkTopology(final AdvancedNetworkTopology advancedNetworkTopology) {
          _advancedNetworkTopology = advancedNetworkTopology;
      }
  
      /**
       *  Method used for tests purpose only. Please do not use it to set the BasicNetworkTopology and it is managed by Spring.
       * @param basicNetworkTopology
       */
      public void setBasicNetworkTopology(final BasicNetworkTopology basicNetworkTopology) {
          _basicNetworkTopology = basicNetworkTopology;
      }
  }
  