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.storage;
  
  import java.util.Map;
  
  import javax.inject.Inject;
  
  import org.apache.cloudstack.framework.config.dao.ConfigurationDao;
  import org.apache.cloudstack.framework.config.impl.ConfigurationVO;
  import org.apache.cloudstack.storage.datastore.db.ImageStoreDao;
  import org.apache.cloudstack.storage.datastore.db.ImageStoreDetailsDao;
  import org.apache.cloudstack.storage.datastore.db.ImageStoreVO;
  
  import com.cloud.capacity.CapacityManager;
  import com.google.common.base.Preconditions;
  
  public class ImageStoreDetailsUtil {
  
      @Inject
      protected ImageStoreDao imageStoreDao;
      @Inject
      protected ImageStoreDetailsDao imageStoreDetailsDao;
      @Inject
      protected ConfigurationDao configurationDao;
  
      /**
       * Retrieve global secondary storage NFS version default value
       * @return global default value
       */
      protected String getGlobalDefaultNfsVersion(){
          ConfigurationVO globalNfsVersion = configurationDao.findByName(CapacityManager.ImageStoreNFSVersion.key());
          Preconditions.checkState(globalNfsVersion != null, "Unable to find global NFS version for version key " + CapacityManager.ImageStoreNFSVersion.key());
          return globalNfsVersion.getValue();
      }
      /**
       * Obtain NFS protocol version (if provided) for a store id, if not use default config value<br/>
       * @param storeId image store id
       * @return {@code null} if {@code secstorage.nfs.version} is not found for storeId <br/>
       * {@code X} if {@code secstorage.nfs.version} is found for storeId
       */
      public String getNfsVersion(long storeId) throws NumberFormatException {
  
          final Map<String, String> storeDetails = imageStoreDetailsDao.getDetails(storeId);
          if (storeDetails != null && storeDetails.containsKey(CapacityManager.ImageStoreNFSVersion.key())) {
              return storeDetails.get(CapacityManager.ImageStoreNFSVersion.key());
          }
  
          return getGlobalDefaultNfsVersion();
  
      }
  
      /**
       * Obtain NFS protocol version (if provided) for a store uuid.<br/>
       * @param storeUuid image store id
       * @return {@code null} if {@code secstorage.nfs.version} is not found for storeUuid <br/>
       * {@code X} if {@code secstorage.nfs.version} is found for storeUuid
       */
      public String getNfsVersionByUuid(String storeUuid){
          ImageStoreVO imageStore = imageStoreDao.findByUuid(storeUuid);
          if (imageStore != null){
              return getNfsVersion(imageStore.getId());
          }
          return getGlobalDefaultNfsVersion();
      }
  
  }
  