private String getValueOfField(XMLField xmlField, String language) {
   String fieldValue = xmlField.getValue();
   if (fieldValue == null) {
     fieldValue = "";
   } else {
     if (fieldValue.startsWith("image_") || fieldValue.startsWith("file_")) {
       String attachmentId =
           fieldValue.substring(fieldValue.indexOf("_") + 1, fieldValue.length());
       if (StringUtil.isDefined(attachmentId)) {
         if (attachmentId.startsWith("/")) {
           // case of an image provided by a gallery
           fieldValue = attachmentId;
         } else {
           SimpleDocument attachment =
               AttachmentServiceFactory.getAttachmentService()
                   .searchDocumentById(
                       new SimpleDocumentPK(attachmentId, getPK().getInstanceId()), language);
           if (attachment != null) {
             fieldValue = attachment.getAttachmentURL();
           }
         }
       } else {
         fieldValue = "";
       }
     } else if (fieldValue.startsWith(WysiwygFCKFieldDisplayer.dbKey)) {
       fieldValue =
           WysiwygFCKFieldDisplayer.getContentFromFile(
               getPK().getInstanceId(), getPK().getId(), xmlField.getName(), language);
     } else {
       fieldValue = EncodeHelper.javaStringToHtmlParagraphe(fieldValue);
     }
   }
   return fieldValue;
 }