private boolean compareValue(final CompareOperator op, final ByteArrayComparable comparator,
    final Cell cell) {
    if (op == CompareOperator.NO_OP) {
      return true;
    }
    int compareResult = PrivateCellUtil.compareValue(cell, comparator);
    return CompareFilter.compare(op, compareResult);
  }
This method is used to determine a cell should be included or filtered out.
@param op         one of operators {@link CompareOperator}
@param comparator comparator used to compare cells.
@param cell       cell to be compared.
@return true means cell should be filtered out, included otherwise.
hbase-client/src/main/java/org/apache/hadoop/hbase/filter/ColumnValueFilter.java