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 com.cloud.hypervisor.vmware.mo;
  
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  import com.vmware.vim25.PerfCounterInfo;
  import com.vmware.vim25.PerfSummaryType;
  
  public class PerfCounterInfoMapper {
      // map <group name, counter name, list of PerfCounterInfo based on rollupType>
      Map<String, Map<String, List<PerfCounterInfo>>> _mapCounterInfos = new HashMap<String, Map<String, List<PerfCounterInfo>>>();
  
      public PerfCounterInfoMapper(PerfCounterInfo[] counterInfos) {
          if (counterInfos != null) {
              for (PerfCounterInfo counterInfo : counterInfos) {
                  List<PerfCounterInfo> counterInfoList = getSafeCounterInfoList(counterInfo.getGroupInfo().getKey(), counterInfo.getNameInfo().getKey());
                  counterInfoList.add(counterInfo);
              }
          }
      }
  
      public PerfCounterInfo[] lookup(String groupName, String counterName, PerfSummaryType rollupType) {
          assert (groupName != null);
          assert (counterName != null);
  
          Map<String, List<PerfCounterInfo>> groupMap = _mapCounterInfos.get(groupName);
          if (groupMap == null)
              return null;
  
          List<PerfCounterInfo> counterInfoList = groupMap.get(counterName);
          if (counterInfoList == null)
              return null;
  
          if (rollupType == null) {
              return counterInfoList.toArray(new PerfCounterInfo[0]);
          }
  
          for (PerfCounterInfo info : counterInfoList) {
              if (info.getRollupType() == rollupType)
                  return new PerfCounterInfo[] {info};
          }
  
          return null;
      }
  
      public PerfCounterInfo lookupOne(String groupName, String counterName, PerfSummaryType rollupType) {
          PerfCounterInfo[] infos = lookup(groupName, counterName, rollupType);
          if (infos != null && infos.length > 0)
              return infos[0];
  
          return null;
      }
  
      private Map<String, List<PerfCounterInfo>> getSafeGroupMap(String groupName) {
          Map<String, List<PerfCounterInfo>> groupMap = _mapCounterInfos.get(groupName);
          if (groupMap == null) {
              groupMap = new HashMap<String, List<PerfCounterInfo>>();
              _mapCounterInfos.put(groupName, groupMap);
          }
          return groupMap;
      }
  
      private List<PerfCounterInfo> getSafeCounterInfoList(String groupName, String counterName) {
          Map<String, List<PerfCounterInfo>> groupMap = getSafeGroupMap(groupName);
          assert (groupMap != null);
  
          List<PerfCounterInfo> counterInfoList = groupMap.get(counterName);
          if (counterInfoList == null) {
              counterInfoList = new ArrayList<PerfCounterInfo>();
              groupMap.put(counterName, counterInfoList);
          }
          return counterInfoList;
      }
  }
  