How to use

toString

method

in

org.postgresql.util.HStoreConverter

private void setMap(int parameterIndex, Map<?, ?> x) throws SQLException {
 int oid = connection.getTypeInfo().getPGType("hstore");
 if (oid == Oid.UNSPECIFIED) {
  throw new PSQLException(GT.tr("No hstore extension installed."),
    PSQLState.INVALID_PARAMETER_TYPE);
 }
 if (connection.binaryTransferSend(oid)) {
  byte[] data = HStoreConverter.toBytes(x, connection.getEncoding());
  bindBytes(parameterIndex, data, oid);
 } else {
  setString(parameterIndex, HStoreConverter.toString(x), oid);
 }
}

return HStoreConverter.toString((Map<?, ?>) obj);

@Override
public void nullSafeSet(PreparedStatement preparedStatement, Object value, int i, SharedSessionContractImplementor sessionImplementor) throws HibernateException, SQLException {
  String s = HStoreConverter.toString((Map) value);
  preparedStatement.setObject(i, s, Types.OTHER);
}