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.asterix.dataflow.data.nontagged.serde;
  
  import java.io.DataInput;
  import java.io.DataOutput;
  import java.io.IOException;
  
  import org.apache.asterix.om.base.AInterval;
  import org.apache.asterix.om.types.ATypeTag;
  import org.apache.hyracks.api.dataflow.value.ISerializerDeserializer;
  import org.apache.hyracks.api.exceptions.HyracksDataException;
  import org.apache.hyracks.data.std.primitive.BytePointable;
  import org.apache.hyracks.data.std.primitive.IntegerPointable;
  import org.apache.hyracks.data.std.primitive.LongPointable;
  
  /**
   * This class serializes and de-serializes the binary data representation of an interval.
   *
   * Interval {
   *   byte type;
   *   T start;
   *   T end;
   * }
   *
   * T can be of type date, time or datetime.
   */
  public class AIntervalSerializerDeserializer implements ISerializerDeserializer<AInterval> {
  
      private static final long serialVersionUID = 1L;
  
      public static final AIntervalSerializerDeserializer INSTANCE = new AIntervalSerializerDeserializer();
  
      private AIntervalSerializerDeserializer() {
      }
  
      @Override
      public AInterval deserialize(DataInput in) throws HyracksDataException {
          try {
              byte tag = in.readByte();
              long start, end;
              if (tag == ATypeTag.DATETIME.serialize()) {
                  start = in.readLong();
                  end = in.readLong();
              } else {
                  start = in.readInt();
                  end = in.readInt();
              }
              return new AInterval(start, end, tag);
          } catch (IOException e) {
              throw HyracksDataException.create(e);
          }
  
      }
  
      @Override
      public void serialize(AInterval instance, DataOutput out) throws HyracksDataException {
          try {
              out.writeByte(instance.getIntervalType());
              if (instance.getIntervalType() == ATypeTag.DATETIME.serialize()) {
                  out.writeLong(instance.getIntervalStart());
                  out.writeLong(instance.getIntervalEnd());
              } else {
                  out.writeInt((int) instance.getIntervalStart());
                  out.writeInt((int) instance.getIntervalEnd());
              }
          } catch (IOException e) {
              throw HyracksDataException.create(e);
          }
      }
  
      public static byte getIntervalTimeType(byte[] data, int start) {
          return BytePointable.getByte(data, start);
      }
  
      private static int getTypeSize() {
          return Byte.BYTES;
      }
  
      public static long getIntervalStart(byte[] data, int start) {
          if (getIntervalTimeType(data, start) == ATypeTag.DATETIME.serialize()) {
              return LongPointable.getLong(data, getIntervalStartOffset(start));
          } else {
              return IntegerPointable.getInteger(data, getIntervalStartOffset(start));
          }
      }
  
      public static int getIntervalStartOffset(int start) {
          return start + getTypeSize();
      }
  
      public static int getStartSize(byte[] data, int start) {
          if (getIntervalTimeType(data, start) == ATypeTag.DATETIME.serialize()) {
              return Long.BYTES;
          } else {
              return Integer.BYTES;
          }
      }
  
      public static long getIntervalEnd(byte[] data, int start) {
          if (getIntervalTimeType(data, start) == ATypeTag.DATETIME.serialize()) {
              return LongPointable.getLong(data, getIntervalEndOffset(data, start));
          } else {
              return IntegerPointable.getInteger(data, getIntervalEndOffset(data, start));
          }
      }
  
      public static int getIntervalEndOffset(byte[] data, int start) {
          return getIntervalStartOffset(start) + getStartSize(data, start);
      }
  
      public static int getEndSize(byte[] data, int start) {
          if (getIntervalTimeType(data, start) == ATypeTag.DATETIME.serialize()) {
              return Long.BYTES;
          } else {
              return Integer.BYTES;
          }
      }
  
      public static int getIntervalLength(byte[] data, int start) {
          return getTypeSize() + getStartSize(data, start) + getEndSize(data, start);
      }
  }
  