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 backtype.storm.scheduler;
  
  import java.util.Collection;
  import java.util.HashMap;
  import java.util.Map;
  
  public class Topologies {
      Map<String, TopologyDetails> topologies;
      Map<String, String> nameToId;
  
      public Topologies(Map<String, TopologyDetails> topologies) {
          if (topologies == null)
              topologies = new HashMap<>();
          this.topologies = new HashMap<>(topologies.size());
          this.topologies.putAll(topologies);
          this.nameToId = new HashMap<>(topologies.size());
  
          for (String topologyId : topologies.keySet()) {
              TopologyDetails topology = topologies.get(topologyId);
              this.nameToId.put(topology.getName(), topologyId);
          }
      }
  
      public TopologyDetails getById(String topologyId) {
          return this.topologies.get(topologyId);
      }
  
      public TopologyDetails getByName(String topologyName) {
          String topologyId = this.nameToId.get(topologyName);
  
          if (topologyId == null) {
              return null;
          } else {
              return this.getById(topologyId);
          }
      }
  
      public Collection<TopologyDetails> getTopologies() {
          return this.topologies.values();
      }
  }
  