NullAvaticaParameterConverter.java

/*
 * 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.converter.impl;

import org.apache.arrow.vector.FieldVector;
import org.apache.arrow.vector.NullVector;
import org.apache.arrow.vector.types.pojo.ArrowType;
import org.apache.arrow.vector.types.pojo.Field;
import org.apache.calcite.avatica.AvaticaParameter;
import org.apache.calcite.avatica.remote.TypedValue;

/** AvaticaParameterConverter for Null Arrow types. */
public class NullAvaticaParameterConverter extends BaseAvaticaParameterConverter {

  public NullAvaticaParameterConverter(ArrowType.Null type) {}

  @Override
  public boolean bindParameter(FieldVector vector, TypedValue typedValue, int index) {
    Object value = typedValue.toLocal();
    if (vector instanceof NullVector) {
      if (value != null) {
        throw new RuntimeException("Can't set non-null value on NullVector");
      }
      vector.setNull(index);
    }
    return false;
  }

  @Override
  public AvaticaParameter createParameter(Field field) {
    return createParameter(field, false);
  }
}