@Override
 public final Record getConversionOf(final Record record) throws Exception {
   final Record out = record;
   final SitoolsSettings sitoolsSettings =
       (SitoolsSettings) getContext().getAttributes().get(ContextAttributes.SETTINGS);
   final String dataStorageUrl =
       sitoolsSettings.getString(Consts.APP_DATASTORAGE_ADMIN_URL) + "/directories";
   final String dataStorageRelativePart = sitoolsSettings.getString(Consts.APP_DATASTORAGE_URL);
   final String sitoolsUrl = sitoolsSettings.getString(Consts.APP_URL);
   final String dataStorageName = getInternParam("DataStorageName").getValue();
   final StorageDirectory storageDirectory =
       RIAPUtils.getObjectFromName(dataStorageUrl, dataStorageName, getContext());
   final String dataStorageAttachUrl =
       sitoolsUrl + dataStorageRelativePart + storageDirectory.getAttachUrl();
   LOG.log(Level.FINER, "dataStorageAttachUrl: {0}", dataStorageAttachUrl);
   final String dataStorageLocalPath = storageDirectory.getLocalPath();
   final AttributeValue urlAttr = getInParam("Url", record);
   final Object urlObj = urlAttr.getValue();
   if (Util.isSet(urlObj)) {
     final String url = String.valueOf(urlObj);
     final String filename = url.replace(dataStorageAttachUrl, "");
     LOG.log(Level.FINER, "filename: {0}", filename);
     String absoluteFileName = dataStorageLocalPath.concat(filename);
     LOG.log(Level.FINER, "absoluteFileName: {0}", absoluteFileName);
     absoluteFileName = absoluteFileName.replace("file://", "");
     final File file = new File(absoluteFileName);
     if (!(file.exists() && file.isFile())) {
       urlAttr.setValue(getInternParam("ImageNotFoundUrl").getValue());
     }
   }
   return out;
 }
  /*
   * (non-Javadoc)
   *
   * @see fr.cnes.sitools.plugins.resources.model.ResourceModel#initParametersForAdmin(org.restlet.Context)
   */
  @Override
  public void initParametersForAdmin(Context context) {
    super.initParametersForAdmin(context);

    SitoolsSettings settings =
        (SitoolsSettings) context.getAttributes().get(ContextAttributes.SETTINGS);
    ResourceParameter nbThreads = getParameterByName("nbThreads");
    nbThreads.setValue(settings.getString(Consts.DEFAULT_THREAD_POOL_SIZE));
  }