public boolean containsNonEmptyColumn(byte[] family, int foffset, int flength, byte[] qualifier,
    int qoffset, int qlength) {

    Cell kv = getColumnLatestCell(family, foffset, flength, qualifier, qoffset, qlength);

    return (kv != null) && (kv.getValueLength() > 0);
  }
Checks if the specified column contains a non-empty value (not a zero-length byte array).
@param family    family name
@param foffset   family offset
@param flength   family length
@param qualifier column qualifier
@param qoffset   qualifier offset
@param qlength   qualifier length
@return whether or not a latest value exists and is not empty
hbase-client/src/main/java/org/apache/hadoop/hbase/client/Result.java