lists all folders and files in the given dir as xml tags . concode_field_sep int EN_OK concode_elem_sep int EN_SECURITY_ERROR concode_elem_sep Element errorElement concode_elem_sep int EN_UKNOWN concode_elem_sep Element filesElement concode_elem_sep Document document concode_elem_sep int EN_ALREADY_EXISTS concode_elem_sep int EN_INVALID_FOLDER_NAME concode_elem_sep Element foldersElement concode_elem_sep int EN_ERROR concode_field_sep void setError concode_elem_sep void setError concode_elem_sep void setFolders concode_elem_sep String toString concode_elem_sep void setFiles