/**
 * Licensed 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.hadoop.hive.ql.io.parquet.timestamp;

import java.nio.ByteBuffer;
import java.nio.ByteOrder;

import org.apache.parquet.Preconditions;
import org.apache.parquet.io.api.Binary;
import org.apache.parquet.io.api.RecordConsumer;
/**
 * Provides a wrapper representing a parquet-timestamp, with methods to
 * convert to and from binary.
 */
public class NanoTime {
  private final int julianDay;
  private final long timeOfDayNanos;
  public static NanoTime fromBinary(Binary bytes) {
    Preconditions.checkArgument(bytes.length() == 12, "Must be 12 bytes");
    ByteBuffer buf = bytes.toByteBuffer();
    buf.order(ByteOrder.LITTLE_ENDIAN);
    long timeOfDayNanos = buf.getLong();
    int julianDay = buf.getInt();
    return new NanoTime(julianDay, timeOfDayNanos);
  }

  public NanoTime(int julianDay, long timeOfDayNanos) {
    this.julianDay = julianDay;
    this.timeOfDayNanos = timeOfDayNanos;
  }

  public int getJulianDay() {
    return julianDay;
  }

  public long getTimeOfDayNanos() {
    return timeOfDayNanos;
  }

  public Binary toBinary() {
    ByteBuffer buf = ByteBuffer.allocate(12);
    buf.order(ByteOrder.LITTLE_ENDIAN);
    buf.putLong(timeOfDayNanos);
    buf.putInt(julianDay);
    buf.flip();
    return Binary.fromByteBuffer(buf);
  }

  public void writeValue(RecordConsumer recordConsumer) {
    recordConsumer.addBinary(toBinary());
  }

  @Override
  public String toString() {
    return "NanoTime{julianDay="+julianDay+", timeOfDayNanos="+timeOfDayNanos+"}";
  }
}