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.binder;
  
  import java.lang.reflect.Array;
  import java.util.ArrayList;
  import java.util.Arrays;
  import org.apache.arrow.vector.FieldVector;
  import org.apache.arrow.vector.complex.ListVector;
  import org.apache.arrow.vector.complex.impl.UnionListReader;
  import org.apache.arrow.vector.util.Text;
  
  /** A column binder for list of primitive values. */
  public class ListBinder extends BaseColumnBinder<ListVector> {
  
    private final UnionListReader listReader;
    private final Class<?> arrayElementClass;
    private final boolean isTextColumn;
  
    public ListBinder(ListVector vector) {
      this(vector, java.sql.Types.ARRAY);
    }
  
    /**
     * Init ListBinder and determine type of data vector.
     *
     * @param vector corresponding data vector from arrow buffer for binding
     * @param jdbcType parameter jdbc type
     */
    public ListBinder(ListVector vector, int jdbcType) {
      super(vector, jdbcType);
      listReader = vector.getReader();
      Class<? extends FieldVector> dataVectorClass = vector.getDataVector().getClass();
      try {
        arrayElementClass = dataVectorClass.getMethod("getObject", Integer.TYPE).getReturnType();
      } catch (NoSuchMethodException e) {
        final String message =
            String.format(
                "Issue to determine type for getObject method of data vector class %s ",
                dataVectorClass.getName());
        throw new RuntimeException(message);
      }
      isTextColumn = arrayElementClass.isAssignableFrom(Text.class);
    }
  
    @Override
    public void bind(java.sql.PreparedStatement statement, int parameterIndex, int rowIndex)
        throws java.sql.SQLException {
      listReader.setPosition(rowIndex);
      ArrayList<?> sourceArray = (ArrayList<?>) listReader.readObject();
      Object array;
      if (!isTextColumn) {
        array = Array.newInstance(arrayElementClass, sourceArray.size());
        Arrays.setAll((Object[]) array, sourceArray::get);
      } else {
        array = new String[sourceArray.size()];
        Arrays.setAll(
            (Object[]) array,
            idx -> sourceArray.get(idx) != null ? sourceArray.get(idx).toString() : null);
      }
      statement.setObject(parameterIndex, array);
    }
  }
  