//////////////////////////////////////////////////////////
      // public API
      void UserRoleReaderWriter::addRolesFromFile()
      {
        QFile file(DefaultRoleFile);
        if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) {
          Utility::Logger::writeWarning("[UserRoleReaderWriter]::addRolesFromFile() -- Could not open default Roles file:  %s", DefaultRoleFile.toStdString().c_str());
          return;
        }
        // Read the file into a dom
        QDomDocument dom;
        if (!dom.setContent(&file)) {
          Utility::Logger::writeError("[UserRoleReaderWriter]::addRolesFromFile() -- Could not load file %s into DOM tree.", DefaultRoleFile.toStdString().c_str());
          return;
        }
        file.close();

        // The dom is created now -- start parsing out the user roles.
        QDomElement xmlRoot = dom.firstChildElement();
        // The root should have the version.
        QString version = xmlRoot.attribute("version", "-1.0");
        if (version == "-1.0") {
          Utility::Logger::writeError("[UserRoleReaderWriter]::addRolesFromFile() -- User Role file at %s has no version information", DefaultRoleFile.toStdString().c_str());
          return;
        }

        // If we have the correct info now, we can simply parse things
        // by following the dom tree.
        QDomNodeList roles = xmlRoot.elementsByTagName("UserRole");
        for (int i = 0; i < roles.size(); ++i) {
          QDomNode node = roles.at(i);
          if (node.nodeType() != QDomNode::ElementNode) continue;
          QDomElement element = node.toElement();
          QString roleName = element.text();
          bool hasName = WorkflowManager::globalInstance()->hasRole(roleName);
          if (hasName) continue;
          UserRole* newRole = new UserRole();
          newRole->setName(roleName);
          WorkflowManager::globalInstance()->addRole(newRole);
        }
      }