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.adapter.jdbc.consumer;
  
  import java.io.IOException;
  import java.sql.ResultSet;
  import java.sql.SQLException;
  import org.apache.arrow.adapter.jdbc.JdbcFieldInfo;
  import org.apache.arrow.adapter.jdbc.consumer.exceptions.JdbcConsumerException;
  import org.apache.arrow.util.AutoCloseables;
  import org.apache.arrow.vector.ValueVector;
  import org.apache.arrow.vector.VectorSchemaRoot;
  
  /** Composite consumer which hold all consumers. It manages the consume and cleanup process. */
  public class CompositeJdbcConsumer implements JdbcConsumer {
  
    private final JdbcConsumer[] consumers;
  
    /** Construct an instance. */
    public CompositeJdbcConsumer(JdbcConsumer[] consumers) {
      this.consumers = consumers;
    }
  
    @Override
    public void consume(ResultSet rs) throws SQLException, IOException {
      for (int i = 0; i < consumers.length; i++) {
        try {
          consumers[i].consume(rs);
        } catch (Exception e) {
          if (consumers[i] instanceof BaseConsumer) {
            BaseConsumer consumer = (BaseConsumer) consumers[i];
            JdbcFieldInfo fieldInfo =
                new JdbcFieldInfo(rs.getMetaData(), consumer.columnIndexInResultSet);
  
            throw new JdbcConsumerException(
                "Exception while consuming JDBC value", e, fieldInfo, consumer.vector.getField());
          } else {
            throw e;
          }
        }
      }
    }
  
    @Override
    public void close() {
  
      try {
        // clean up
        AutoCloseables.close(consumers);
      } catch (Exception e) {
        throw new RuntimeException("Error occurred while releasing resources.", e);
      }
    }
  
    @Override
    public void resetValueVector(ValueVector vector) {}
  
    /** Reset inner consumers through vectors in the vector schema root. */
    public void resetVectorSchemaRoot(VectorSchemaRoot root) {
      assert root.getFieldVectors().size() == consumers.length;
      for (int i = 0; i < consumers.length; i++) {
        consumers[i].resetValueVector(root.getVector(i));
      }
    }
  }
  