private void readMapper(String mapperDf) {
		File file = new File(mapperDf);
		try {
			BufferedReader reader = new BufferedReader(new FileReader(file));
			String title = reader.readLine();
			mTitles = title.trim().split("\\s+");
			
			String line;
			while((line = reader.readLine()) != null) {
				String[] s = line.trim().split("\\s+");
				ArrayList<String> list = new ArrayList<String>();
				for(String str : s)
					list.add(str);
				mapperMatrix.add(list);
			}
			reader.close();
		} catch (FileNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		
	}