/*
 * 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.drill.exec.store.hive.writers.primitive;

import org.apache.drill.exec.vector.complex.writer.TimeStampWriter;
import org.apache.hadoop.hive.serde2.objectinspector.PrimitiveObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorUtils;
import org.apache.hadoop.io.LongWritable;
import org.joda.time.DateTime;
import org.joda.time.DateTimeConstants;
import org.joda.time.DateTimeZone;

import java.sql.Timestamp;

public class HiveTimestampWriter extends AbstractSingleValueWriter<PrimitiveObjectInspector, TimeStampWriter> {

  public HiveTimestampWriter(PrimitiveObjectInspector inspector, TimeStampWriter writer) {
    super(inspector, writer);
  }

  @Override
  public void write(Object value) {
    if (value instanceof LongWritable) {
      writer.writeTimeStamp(((LongWritable) value).get() / DateTimeConstants.MILLIS_PER_SECOND);
    } else {
      String timestampString = PrimitiveObjectInspectorUtils.getString(value, inspector);
      long timestampMillis = new DateTime(Timestamp.valueOf(timestampString).getTime())
          .withZoneRetainFields(DateTimeZone.UTC).getMillis();
      writer.writeTimeStamp(timestampMillis);
    }
  }

}
