}
if(dataFilePath.endsWith("xls")){
fileReader = new XLSReader(new File(dataFilePath));
}
if(dataFilePath.endsWith("wss")){
fileReader = new WSSReader(new File(dataFilePath));
}
if (fileReader!=null)
data = fileReader.readData();
else throw new Exception("Usupported File Extension");
dataImported = true;