private void UpdateOptions() {
    getCompulsoryActions().clear();
    getOptionalActions().clear();

    if (getEntity() != null) {
      storage_pool dataCenter = null;
      if (getEntity().getstorage_pool_id() != null) {
        dataCenter = DataProvider.GetDataCenterById(getEntity().getstorage_pool_id().getValue());
      }
      if (dataCenter == null || dataCenter.getstorage_pool_type() != StorageType.LOCALFS) {
        // Add host action.
        UICommand addHostAction = new UICommand("AddHost", this);

        // 				var hosts = DataProvider.GetHostListByCluster(Entity.name)
        // 					.Skip(1)
        // 					.ToList();
        java.util.ArrayList<VDS> hosts = DataProvider.GetHostListByCluster(getEntity().getname());
        if (hosts.size() > 1) {
          hosts.remove(0);
        }

        if (hosts.isEmpty()) {
          addHostAction.setTitle(ClusterConfigureHostsAction);
          getCompulsoryActions().add(addHostAction);
        } else {
          addHostAction.setTitle(ClusterAddAnotherHostAction);
          getOptionalActions().add(addHostAction);
        }
        if (getEntity().getstorage_pool_id() == null) {
          addHostAction.setIsExecutionAllowed(false);
          addHostAction
              .getExecuteProhibitionReasons()
              .add("The Cluster isn't attached to a Data Center");
          return;
        }
        java.util.ArrayList<VDSGroup> clusters =
            DataProvider.GetClusterList((Guid) getEntity().getstorage_pool_id());
        Version minimalClusterVersion = Linq.GetMinVersionByClusters(clusters);
        java.util.ArrayList<VDS> availableHosts = new java.util.ArrayList<VDS>();
        for (VDS vds : DataProvider.GetHostList()) {
          if ((!Linq.IsHostBelongsToAnyOfClusters(clusters, vds))
              && (vds.getstatus() == VDSStatus.Maintenance
                  || vds.getstatus() == VDSStatus.PendingApproval)
              && (vds.getVersion().getFullVersion() == null
                  || Extensions.GetFriendlyVersion(vds.getVersion().getFullVersion())
                          .compareTo(minimalClusterVersion)
                      >= 0)) {
            availableHosts.add(vds);
          }
        }
        // Select host action.
        UICommand selectHostAction = new UICommand("SelectHost", this);

        if (availableHosts.size() > 0 && clusters.size() > 0) {
          if (hosts.isEmpty()) {
            selectHostAction.setTitle(SelectHostsAction);
            getCompulsoryActions().add(selectHostAction);
          } else {
            selectHostAction.setTitle(SelectHostsAction);
            getOptionalActions().add(selectHostAction);
          }
        }
      } else {
        UICommand tempVar = new UICommand("AddHost", this);
        tempVar.setTitle(ClusterAddAnotherHostAction);
        UICommand addHostAction = tempVar;
        UICommand tempVar2 = new UICommand("SelectHost", this);
        tempVar2.setTitle(SelectHostsAction);
        UICommand selectHost = tempVar2;
        VDS host = DataProvider.GetLocalStorageHost(dataCenter.getname());
        if (host != null) {
          addHostAction.setIsExecutionAllowed(false);
          selectHost.setIsExecutionAllowed(false);
          String hasHostReason =
              "This Cluster belongs to a Local Data Center which already contain a Host";
          addHostAction.getExecuteProhibitionReasons().add(hasHostReason);
          selectHost.getExecuteProhibitionReasons().add(hasHostReason);
        }
        getCompulsoryActions().add(addHostAction);
        getOptionalActions().add(selectHost);
      }
    }
  }
  public void SetDefaultNames(VDS host, RefObject<String> message) {
    message.argvalue = null;
    setCommonName(StringFormat.format("%1$s-Local", host.getvds_name().replace('.', '-')));
    storage_pool candidate = null;

    // selecet all possible DCs
    VdcQueryReturnValue returnValue =
        Frontend.RunQuery(
            VdcQueryType.Search,
            new SearchParameters(
                StringFormat.format("DataCenter: name=%1$s", getCommonName() + "*"),
                SearchType.StoragePool));

    java.util.ArrayList<storage_pool> dataCenterList = new java.util.ArrayList<storage_pool>();
    java.util.ArrayList<VDSGroup> clusterList = null;
    if (returnValue != null && returnValue.getSucceeded() && returnValue.getReturnValue() != null) {
      dataCenterList =
          Linq.<storage_pool>Cast(
              (java.util.ArrayList<IVdcQueryable>) returnValue.getReturnValue());
    }
    // check if current settings suitable for local setup (in case just SD creation failed -
    // re-using the same setup)
    boolean useCurrentSettings = false;
    if (host.getstorage_pool_id() != null) {
      storage_pool tempCandidate = DataProvider.GetDataCenterById(host.getstorage_pool_id());
      if (IsLocalDataCenterEmpty(tempCandidate)) {
        candidate = tempCandidate;
        useCurrentSettings = true;
      } else {
        if (tempCandidate != null && tempCandidate.getstorage_pool_type() == StorageType.LOCALFS) {
          message.argvalue =
              "Note: Local Storage is already configured for this Host. The Host belongs to "
                  + host.getstorage_pool_name()
                  + " with local Storage Domain. If OK is clicked - this Host will be moved to a new Data Center, and a new Local Storage Domain will be created. Hit Cancel to abort the operation.";
        }
      }
    }
    // check if there is other DC suitable for re-use
    if (candidate == null) {
      for (storage_pool dataCenter : dataCenterList) {
        // need to check if the new DC is without host.
        if (IsLocalDataCenterEmpty(dataCenter)
            && DataProvider.GetLocalStorageHost(dataCenter.getname()) == null) {
          candidate = dataCenter;
          break;
        }
      }
    }
    java.util.ArrayList<String> listNames = new java.util.ArrayList<String>();
    // in case we found a suitable candidte for re-use:
    if (candidate != null) {
      getDataCenter().setDataCenterId(candidate.getId());
      getDataCenter().getName().setEntity(candidate.getname());
      getDataCenter().getDescription().setEntity(candidate.getdescription());
      Version compVersion = candidate.getcompatibility_version();
      getDataCenter().getVersion().setSelectedItem(compVersion);
      getCluster().getVersion().setSelectedItem(compVersion);
      setDontCreateDataCenter(true);
      // if we use current settings there is no need to create cluster.
      if (useCurrentSettings) {
        getCluster().setClusterId(host.getvds_group_id().getValue());
        getCluster().getName().setEntity(host.getvds_group_name());
        VDSGroup cluster = DataProvider.GetClusterById(host.getvds_group_id().getValue());
        if (cluster != null) {
          getCluster().getDescription().setEntity(cluster.getdescription());
          ServerCpu tempVar = new ServerCpu();
          tempVar.setCpuName(cluster.getcpu_name());
          getCluster().getCPU().setSelectedItem(tempVar);
        }
        setDontCreateCluster(true);
        setDontChangeHostCluster(true);
      }
      // use differnt cluster
      else {
        // check the DC cluster list (for re-use)
        clusterList = DataProvider.GetClusterList(candidate.getId());
        // no clusters avilable - pick up new name.
        if (clusterList.isEmpty()) {
          java.util.ArrayList<VDSGroup> listClusters = DataProvider.GetClusterList();
          listNames = new java.util.ArrayList<String>();
          for (VDSGroup cluster : listClusters) {
            listNames.add(cluster.getname());
          }
          getCluster().getName().setEntity(AvailableName(listNames));
        } else {
          // use the DC cluster.
          getCluster().setClusterId(clusterList.get(0).getId());
          getCluster().getName().setEntity(clusterList.get(0).getname());
          getCluster().getDescription().setEntity(clusterList.get(0).getdescription());
          VDSGroup cluster = DataProvider.GetClusterById(getCluster().getClusterId().getValue());
          if (cluster != null) {
            ServerCpu tempVar2 = new ServerCpu();
            tempVar2.setCpuName(cluster.getcpu_name());
            getCluster().getCPU().setSelectedItem(tempVar2);
          }
          setDontCreateCluster(true);
          if (host.getvds_group_id().getValue().equals(getCluster().getClusterId())) {
            setDontChangeHostCluster(true);
          }
        }
      }
    } else {
      // didn't found DC to re-use, so we select new names:
      listNames = new java.util.ArrayList<String>();
      for (storage_pool storagePool : dataCenterList) {
        listNames.add(storagePool.getname());
      }
      getDataCenter().getName().setEntity(AvailableName(listNames));

      // Choose a Data Center version corresponding to the host.
      if (!StringHelper.isNullOrEmpty(host.getsupported_cluster_levels())) {
        // the supported_cluster_levels are sorted.
        String[] array = host.getsupported_cluster_levels().split("[,]", -1);
        Version maxCombindVersion = null;

        for (int i = 0; i < array.length; i++) {
          Version vdsVersion = new Version(array[i]);
          for (Version version :
              (java.util.List<Version>) getDataCenter().getVersion().getItems()) {
            if (version.equals(vdsVersion) && version.compareTo(maxCombindVersion) > 0) {
              maxCombindVersion = version;
            }
          }
        }
        if (maxCombindVersion != null) {
          getDataCenter().getVersion().setSelectedItem(maxCombindVersion);
          getCluster().getVersion().setSelectedItem(maxCombindVersion);
        }
      }

      listNames = new java.util.ArrayList<String>();
      if (clusterList == null) {
        clusterList = DataProvider.GetClusterList();
      }

      for (VDSGroup cluster : clusterList) {
        listNames.add(cluster.getname());
      }
      getCluster().getName().setEntity(AvailableName(listNames));
    }

    // Choose default CPU name to match host.
    if (host.getCpuName() != null && getCluster().getCPU().getSelectedItem() != null) {
      getCluster()
          .getCPU()
          .setSelectedItem(
              Linq.FirstOrDefault(
                  (java.util.List<ServerCpu>) getCluster().getCPU().getItems(),
                  new Linq.ServerCpuPredicate(host.getCpuName().getCpuName())));
    }
    // always choose a avialable storage name.
    java.util.ArrayList<storage_domains> listStorageDomains = DataProvider.GetStorageDomainList();
    listNames = new java.util.ArrayList<String>();
    for (storage_domains storageDomain : listStorageDomains) {
      listNames.add(storageDomain.getstorage_name());
    }
    getFormattedStorageName().setEntity(AvailableName(listNames));
  }