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.accessor.impl.calendar;
  
  import static org.apache.arrow.driver.jdbc.accessor.impl.calendar.ArrowFlightJdbcTimeVectorGetter.Getter;
  import static org.apache.arrow.driver.jdbc.accessor.impl.calendar.ArrowFlightJdbcTimeVectorGetter.Holder;
  import static org.apache.arrow.driver.jdbc.accessor.impl.calendar.ArrowFlightJdbcTimeVectorGetter.createGetter;
  
  import java.sql.SQLException;
  import java.sql.Time;
  import java.sql.Timestamp;
  import java.time.LocalTime;
  import java.util.Calendar;
  import java.util.concurrent.TimeUnit;
  import java.util.function.IntSupplier;
  import org.apache.arrow.driver.jdbc.ArrowFlightJdbcTime;
  import org.apache.arrow.driver.jdbc.accessor.ArrowFlightJdbcAccessor;
  import org.apache.arrow.driver.jdbc.accessor.ArrowFlightJdbcAccessorFactory;
  import org.apache.arrow.driver.jdbc.utils.DateTimeUtils;
  import org.apache.arrow.vector.TimeMicroVector;
  import org.apache.arrow.vector.TimeMilliVector;
  import org.apache.arrow.vector.TimeNanoVector;
  import org.apache.arrow.vector.TimeSecVector;
  import org.apache.arrow.vector.ValueVector;
  
  /**
   * Accessor for the Arrow types: {@link TimeNanoVector}, {@link TimeMicroVector}, {@link
   * TimeMilliVector} and {@link TimeSecVector}.
   */
  public class ArrowFlightJdbcTimeVectorAccessor extends ArrowFlightJdbcAccessor {
  
    private final Getter getter;
    private final TimeUnit timeUnit;
    private final Holder holder;
  
    /**
     * Instantiate an accessor for a {@link TimeNanoVector}.
     *
     * @param vector an instance of a TimeNanoVector.
     * @param currentRowSupplier the supplier to track the lines.
     * @param setCursorWasNull the consumer to set if value was null.
     */
    public ArrowFlightJdbcTimeVectorAccessor(
        TimeNanoVector vector,
        IntSupplier currentRowSupplier,
        ArrowFlightJdbcAccessorFactory.WasNullConsumer setCursorWasNull) {
      super(currentRowSupplier, setCursorWasNull);
      this.holder = new Holder();
      this.getter = createGetter(vector);
      this.timeUnit = getTimeUnitForVector(vector);
    }
  
    /**
     * Instantiate an accessor for a {@link TimeMicroVector}.
     *
     * @param vector an instance of a TimeMicroVector.
     * @param currentRowSupplier the supplier to track the lines.
     * @param setCursorWasNull the consumer to set if value was null.
     */
    public ArrowFlightJdbcTimeVectorAccessor(
        TimeMicroVector vector,
        IntSupplier currentRowSupplier,
        ArrowFlightJdbcAccessorFactory.WasNullConsumer setCursorWasNull) {
      super(currentRowSupplier, setCursorWasNull);
      this.holder = new Holder();
      this.getter = createGetter(vector);
      this.timeUnit = getTimeUnitForVector(vector);
    }
  
    /**
     * Instantiate an accessor for a {@link TimeMilliVector}.
     *
     * @param vector an instance of a TimeMilliVector.
     * @param currentRowSupplier the supplier to track the lines.
     */
    public ArrowFlightJdbcTimeVectorAccessor(
        TimeMilliVector vector,
        IntSupplier currentRowSupplier,
        ArrowFlightJdbcAccessorFactory.WasNullConsumer setCursorWasNull) {
      super(currentRowSupplier, setCursorWasNull);
      this.holder = new Holder();
      this.getter = createGetter(vector);
      this.timeUnit = getTimeUnitForVector(vector);
    }
  
    /**
     * Instantiate an accessor for a {@link TimeSecVector}.
     *
     * @param vector an instance of a TimeSecVector.
     * @param currentRowSupplier the supplier to track the lines.
     */
    public ArrowFlightJdbcTimeVectorAccessor(
        TimeSecVector vector,
        IntSupplier currentRowSupplier,
        ArrowFlightJdbcAccessorFactory.WasNullConsumer setCursorWasNull) {
      super(currentRowSupplier, setCursorWasNull);
      this.holder = new Holder();
      this.getter = createGetter(vector);
      this.timeUnit = getTimeUnitForVector(vector);
    }
  
    @Override
    public Class<?> getObjectClass() {
      return Time.class;
    }
  
    @Override
    public Object getObject() {
      return this.getTime(null);
    }
  
    @Override
    public <T> T getObject(final Class<T> type) throws SQLException {
      final Object value;
      if (type == LocalTime.class) {
        value = getLocalTime();
      } else if (type == Time.class) {
        value = getObject();
      } else {
        throw new SQLException("Object type not supported for Time Vector");
      }
      return !type.isPrimitive() && wasNull ? null : type.cast(value);
    }
  
    @Override
    public Time getTime(Calendar calendar) {
      fillHolder();
      if (this.wasNull) {
        return null;
      }
  
      long value = holder.value;
      long milliseconds = this.timeUnit.toMillis(value);
  
      return new ArrowFlightJdbcTime(DateTimeUtils.applyCalendarOffset(milliseconds, calendar));
    }
  
    private LocalTime getLocalTime() {
      return getTime(null).toLocalTime();
    }
  
    private void fillHolder() {
      getter.get(getCurrentRow(), holder);
      this.wasNull = holder.isSet == 0;
      this.wasNullConsumer.setWasNull(this.wasNull);
    }
  
    @Override
    public Timestamp getTimestamp(Calendar calendar) {
      Time time = getTime(calendar);
      if (time == null) {
        return null;
      }
      return new Timestamp(time.getTime());
    }
  
    protected static TimeUnit getTimeUnitForVector(ValueVector vector) {
      if (vector instanceof TimeNanoVector) {
        return TimeUnit.NANOSECONDS;
      } else if (vector instanceof TimeMicroVector) {
        return TimeUnit.MICROSECONDS;
      } else if (vector instanceof TimeMilliVector) {
        return TimeUnit.MILLISECONDS;
      } else if (vector instanceof TimeSecVector) {
        return TimeUnit.SECONDS;
      }
  
      throw new IllegalArgumentException("Invalid Arrow vector");
    }
  }
  