content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   *
   *    http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.arrow.driver.jdbc;
  
  import java.sql.SQLException;
  import org.apache.arrow.driver.jdbc.client.ArrowFlightSqlClientHandler.PreparedStatement;
  import org.apache.arrow.driver.jdbc.utils.ConvertUtils;
  import org.apache.arrow.flight.FlightInfo;
  import org.apache.arrow.vector.types.pojo.Schema;
  import org.apache.calcite.avatica.AvaticaStatement;
  import org.apache.calcite.avatica.Meta;
  import org.apache.calcite.avatica.Meta.StatementHandle;
  
  /** A SQL statement for querying data from an Arrow Flight server. */
  public class ArrowFlightStatement extends AvaticaStatement implements ArrowFlightInfoStatement {
  
    ArrowFlightStatement(
        final ArrowFlightConnection connection,
        final StatementHandle handle,
        final int resultSetType,
        final int resultSetConcurrency,
        final int resultSetHoldability) {
      super(connection, handle, resultSetType, resultSetConcurrency, resultSetHoldability);
    }
  
    @Override
    public ArrowFlightConnection getConnection() throws SQLException {
      return (ArrowFlightConnection) super.getConnection();
    }
  
    @Override
    public FlightInfo executeFlightInfoQuery() throws SQLException {
      final PreparedStatement preparedStatement =
          getConnection().getMeta().getPreparedStatement(handle);
      final Meta.Signature signature = getSignature();
      if (signature == null) {
        return null;
      }
  
      final Schema resultSetSchema = preparedStatement.getDataSetSchema();
      signature.columns.addAll(
          ConvertUtils.convertArrowFieldsToColumnMetaDataList(resultSetSchema.getFields()));
      setSignature(signature);
  
      return preparedStatement.executeQuery();
    }
  }
  