private byte[] readFile(String fileName)
    {
        try {
            InputStream is = persistentStorageService.read(fileName);

            return IOUtils.toByteArray(is);
        } catch (IOException e) {
            Log.e("ContentProvider", "Error reading file: " + fileName, e);
            throw new RuntimeException(e);
        }
    }

    @Override
    public byte[] getBlob(int columnIndex) {

        switch(columnIndex) {

            case ProviderConstants.COLUMN_INDEX_INDEXES:
               return readFile(ProviderConstants.FILE_INDEXES);
            case ProviderConstants.COLUMN_INDEX_IVECTOR:
               return readFile(ProviderConstants.FILE_IVECTORS);
            case ProviderConstants.COLUMN_INDEX_SCORE_NORMALIZATION:
                return readFile(ProviderConstants.FILE_SCORE_NORMALIZATION);
            case ProviderConstants.COLUMN_INDEX_MODEL_A:
                return readFile(ProviderConstants.FILE_MODEL_A);
            case ProviderConstants.COLUMN_INDEX_MODEL_LOGPI:
                return readFile(ProviderConstants.FILE_MODEL_LOGPI);
            case ProviderConstants.COLUMN_INDEX_MODEL_MULT:
                return readFile(ProviderConstants.FILE_MODEL_MULT);
        }

        return null;
    }

    @Override
    public int getColumnCount() {
        return 6;
    }

    @Override
    public int getColumnIndex(String columnName) {
        int column = -1;

        if(columnName.equalsIgnoreCase(ProviderConstants.COLUMN_SCORE_NORMALIZATION)) {
            column = ProviderConstants.COLUMN_INDEX_SCORE_NORMALIZATION;
        } else if(columnName.equalsIgnoreCase(ProviderConstants.COLUMN_INDEXES)) {
            column = ProviderConstants.COLUMN_INDEX_INDEXES;
        } else if(columnName.equalsIgnoreCase(ProviderConstants.COLUMN_IVECTOR)) {
            column = ProviderConstants.COLUMN_INDEX_IVECTOR;
        } else if(columnName.equalsIgnoreCase(ProviderConstants.COLUMN_MODEL_A)) {
            column = ProviderConstants.COLUMN_INDEX_MODEL_A;
        } else if(columnName.equalsIgnoreCase(ProviderConstants.COLUMN_MODEL_LOGPI)) {
            column = ProviderConstants.COLUMN_INDEX_MODEL_LOGPI;
        } else if(columnName.equalsIgnoreCase(ProviderConstants.COLUMN_MODEL_MULT)) {
            column = ProviderConstants.COLUMN_INDEX_MODEL_MULT;
        }

        return column;
    }

    @Override
    public int getColumnIndexOrThrow(String columnName) throws IllegalArgumentException {
        int column = -1;

        if(columnName.equalsIgnoreCase(ProviderConstants.COLUMN_SCORE_NORMALIZATION)) {
            column = ProviderConstants.COLUMN_INDEX_SCORE_NORMALIZATION;
        } else if(columnName.equalsIgnoreCase(ProviderConstants.COLUMN_INDEXES)) {
            column = ProviderConstants.COLUMN_INDEX_INDEXES;
        } else if(columnName.equalsIgnoreCase(ProviderConstants.COLUMN_IVECTOR)) {
            column = ProviderConstants.COLUMN_INDEX_IVECTOR;
        } else if(columnName.equalsIgnoreCase(ProviderConstants.COLUMN_MODEL_A)) {
            column = ProviderConstants.COLUMN_INDEX_MODEL_A;
        } else if(columnName.equalsIgnoreCase(ProviderConstants.COLUMN_MODEL_LOGPI)) {
            column = ProviderConstants.COLUMN_INDEX_MODEL_LOGPI;
        } else if(columnName.equalsIgnoreCase(ProviderConstants.COLUMN_MODEL_MULT)) {
            column = ProviderConstants.COLUMN_INDEX_MODEL_MULT;
        }

        return column;
    }

    @Override
    public String getColumnName(int position) {
        return getColumnNames()[position];
    }

    @Override
    public String[] getColumnNames() {
        String[] names = { ProviderConstants.COLUMN_SCORE_NORMALIZATION,
                ProviderConstants.COLUMN_INDEXES,
                ProviderConstants.COLUMN_IVECTOR,
                ProviderConstants.COLUMN_MODEL_A,
                ProviderConstants.COLUMN_MODEL_LOGPI,
                ProviderConstants.COLUMN_MODEL_MULT };

        return names;
    }


    @Override
    public void fillWindow(int position, CursorWindow window) {
        window.clear();
        window.setNumColumns(6);
        window.allocRow();
        window.setStartPosition(0);
        window.putBlob(readFile(ProviderConstants.FILE_SCORE_NORMALIZATION), 0, 0);
        window.putBlob(readFile(ProviderConstants.FILE_IVECTORS), 0, 1);
        window.putBlob(readFile(ProviderConstants.FILE_INDEXES), 0, 2);
        window.putBlob(readFile(ProviderConstants.FILE_MODEL_A), 0, 3);
        window.putBlob(readFile(ProviderConstants.FILE_MODEL_LOGPI), 0, 4);
        window.putBlob(readFile(ProviderConstants.FILE_MODEL_MULT), 0, 5);
    }