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.xenserver.resource.wrapper.xenbase;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Set;
  
  import org.apache.commons.collections.CollectionUtils;
  import org.apache.commons.lang3.StringUtils;
  
  import com.cloud.agent.api.Answer;
  import com.cloud.agent.api.GetHypervisorGuestOsNamesAnswer;
  import com.cloud.agent.api.GetHypervisorGuestOsNamesCommand;
  import com.cloud.hypervisor.xenserver.resource.CitrixResourceBase;
  import com.cloud.resource.CommandWrapper;
  import com.cloud.resource.ResourceWrapper;
  import com.cloud.utils.Pair;
  import com.xensource.xenapi.Connection;
  import com.xensource.xenapi.VM;
  
  @ResourceWrapper(handles =  GetHypervisorGuestOsNamesCommand.class)
  public final class CitrixGetHypervisorGuestOsNamesCommandWrapper extends CommandWrapper<GetHypervisorGuestOsNamesCommand, Answer, CitrixResourceBase> {
  
      @Override
      public Answer execute(final GetHypervisorGuestOsNamesCommand command, final CitrixResourceBase citrixResourceBase) {
          final Connection conn = citrixResourceBase.getConnection();
          String keyword = command.getKeyword();
          try {
              logger.info("Getting guest os names in the hypervisor");
              final Set<VM> vms = VM.getAll(conn);
              if (CollectionUtils.isEmpty(vms)) {
                  return new GetHypervisorGuestOsNamesAnswer(command, "Guest os names not found in the hypervisor");
              }
              List<Pair<String, String>> hypervisorGuestOsNames = new ArrayList<>();
              for (VM vm : vms) {
                  if (vm != null && vm.getIsATemplate(conn)) {
                      String guestOSNameLabel = vm.getNameLabel(conn);
                      if (StringUtils.isNotBlank(keyword)) {
                          if (guestOSNameLabel.toLowerCase().contains(keyword.toLowerCase())) {
                              Pair<String, String> hypervisorGuestOs = new Pair<>(guestOSNameLabel, guestOSNameLabel);
                              hypervisorGuestOsNames.add(hypervisorGuestOs);
                          }
                      } else {
                          Pair<String, String> hypervisorGuestOs = new Pair<>(guestOSNameLabel, guestOSNameLabel);
                          hypervisorGuestOsNames.add(hypervisorGuestOs);
                      }
                  }
              }
              return new GetHypervisorGuestOsNamesAnswer(command, hypervisorGuestOsNames);
          } catch (final Exception e) {
              logger.error("Failed to fetch hypervisor guest os names due to: " + e.getLocalizedMessage(), e);
              return new GetHypervisorGuestOsNamesAnswer(command, e.getLocalizedMessage());
          }
      }
  }
  