*/
private void buildFolderItemStructure(InterchangeDataHolder dataHolder) {
if ( dataHolder == null )
throw new IllegalArgumentException("dataHolder is null.");
InterchangeDataTable folderItems = dataHolder.getFolderItemTab();
if ( folderItems == null )
return;
InterchangeDataParser dataParser = new InterchangeDataParser(folderItems);
InterchangeDataRow[] arrData = folderItems.getRows();
for( InterchangeDataRow row : arrData ) {
StringKeyValuePairs keyValues = dataParser.parse(row);
FolderId parentFolderId = getFolderId(keyValues.get(FolderItem.PARENT_FOLDER_ID));