@Override
  public int hashCode() {
    int hashCode = 1;

    hashCode = hashCode * 8191 + ((isSetRegionName()) ? 131071 : 524287);
    if (isSetRegionName())
      hashCode = hashCode * 8191 + regionName.hashCode();

    hashCode = hashCode * 8191 + ((isSetClientAddress()) ? 131071 : 524287);
    if (isSetClientAddress())
      hashCode = hashCode * 8191 + clientAddress.hashCode();

    hashCode = hashCode * 8191 + ((isSetTableName()) ? 131071 : 524287);
    if (isSetTableName())
      hashCode = hashCode * 8191 + tableName.hashCode();

    hashCode = hashCode * 8191 + ((isSetUserName()) ? 131071 : 524287);
    if (isSetUserName())
      hashCode = hashCode * 8191 + userName.hashCode();

    hashCode = hashCode * 8191 + ((isSetLimit()) ? 131071 : 524287);
    if (isSetLimit())
      hashCode = hashCode * 8191 + limit;

    hashCode = hashCode * 8191 + ((isSetLogType()) ? 131071 : 524287);
    if (isSetLogType())
      hashCode = hashCode * 8191 + logType.getValue();

    hashCode = hashCode * 8191 + ((isSetFilterByOperator()) ? 131071 : 524287);
    if (isSetFilterByOperator())
      hashCode = hashCode * 8191 + filterByOperator.getValue();

    return hashCode;
  }
Returns true if field corresponding to fieldID is set (has been assigned a value) and false otherwise
hbase-thrift/src/main/java/org/apache/hadoop/hbase/thrift2/generated/TLogQueryFilter.java