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.om.types.hierachy;
  
  import java.io.DataOutput;
  import java.io.IOException;
  import java.util.Arrays;
  
  import org.apache.asterix.common.exceptions.ErrorCode;
  import org.apache.asterix.common.exceptions.RuntimeDataException;
  import org.apache.asterix.om.base.ADouble;
  import org.apache.asterix.om.base.AInt16;
  import org.apache.asterix.om.base.AInt32;
  import org.apache.asterix.om.base.AInt64;
  import org.apache.asterix.om.base.AInt8;
  import org.apache.asterix.om.base.IAObject;
  import org.apache.asterix.om.types.ATypeTag;
  import org.apache.asterix.om.types.hierachy.ATypeHierarchy.TypeCastingMathFunctionType;
  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;
  import org.apache.hyracks.data.std.primitive.ShortPointable;
  import org.apache.hyracks.dataflow.common.data.marshalling.DoubleSerializerDeserializer;
  
  public class IntegerToDoubleTypeConvertComputer implements ITypeConvertComputer {
  
      private static final IntegerToDoubleTypeConvertComputer INSTANCE = new IntegerToDoubleTypeConvertComputer();
  
      private IntegerToDoubleTypeConvertComputer() {
      }
  
      public static IntegerToDoubleTypeConvertComputer getInstance() {
          return INSTANCE;
      }
  
      @Override
      public void convertType(byte[] data, int start, int length, DataOutput out) throws IOException {
          long val = AbstractIntegerTypeConvertComputer.asLong(data, start, length);
          out.writeByte(ATypeTag.DOUBLE.serialize());
          DoubleSerializerDeserializer.write((double) val, out);
      }
  
      double convertType(byte[] data, int start, ATypeTag sourceTypeTag) throws HyracksDataException {
          switch (sourceTypeTag) {
              case TINYINT:
                  return BytePointable.getByte(data, start);
              case SMALLINT:
                  return ShortPointable.getShort(data, start);
              case INTEGER:
                  return IntegerPointable.getInteger(data, start);
              case BIGINT:
                  return LongPointable.getLong(data, start);
              default:
                  throw new RuntimeDataException(ErrorCode.TYPE_CONVERT_INTEGER_SOURCE, Arrays.toString(
                          new ATypeTag[] { ATypeTag.TINYINT, ATypeTag.SMALLINT, ATypeTag.INTEGER, ATypeTag.BIGINT }));
          }
      }
  
      @Override
      public IAObject convertType(IAObject sourceObject, TypeCastingMathFunctionType mathFunction)
              throws HyracksDataException {
          long val;
          switch (sourceObject.getType().getTypeTag()) {
              case TINYINT:
                  val = ((AInt8) sourceObject).getByteValue();
                  break;
              case SMALLINT:
                  val = ((AInt16) sourceObject).getShortValue();
                  break;
              case INTEGER:
                  val = ((AInt32) sourceObject).getIntegerValue();
                  break;
              case BIGINT:
                  val = ((AInt64) sourceObject).getLongValue();
                  break;
              default:
                  throw new RuntimeDataException(ErrorCode.TYPE_CONVERT_INTEGER_SOURCE, Arrays.toString(
                          new ATypeTag[] { ATypeTag.TINYINT, ATypeTag.SMALLINT, ATypeTag.INTEGER, ATypeTag.BIGINT }));
          }
          return new ADouble(val);
      }
  }
  