net.snowflake.client.core.arrow.DoubleToRealConverter Maven / Gradle / Ivy

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Snowflake JDBC Driver
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/*
 * Copyright (c) 2012-2019 Snowflake Computing Inc. All rights reserved.
 */
package net.snowflake.client.core.arrow;

import net.snowflake.client.core.DataConversionContext;
import net.snowflake.client.core.SFException;
import net.snowflake.client.jdbc.ErrorCode;
import net.snowflake.client.jdbc.SnowflakeType;
import net.snowflake.client.jdbc.SnowflakeUtil;
import org.apache.arrow.vector.Float8Vector;
import org.apache.arrow.vector.ValueVector;

import java.math.BigDecimal;
import java.nio.ByteBuffer;

public class DoubleToRealConverter extends AbstractArrowVectorConverter
{
  private Float8Vector float8Vector;
  private ByteBuffer byteBuf = ByteBuffer.allocate(Float8Vector.TYPE_WIDTH);

  public DoubleToRealConverter(ValueVector fieldVector, int columnIndex, DataConversionContext context)
  {
    super(SnowflakeType.REAL.name(), fieldVector, columnIndex, context);
    this.float8Vector = (Float8Vector) fieldVector;
  }

  @Override
  public double toDouble(int index)
  {
    if (float8Vector.isNull(index))
    {
      return 0;
    }
    else
    {
      return float8Vector.getDataBuffer().getDouble(index * Float8Vector.TYPE_WIDTH);
    }
  }

  @Override
  public byte[] toBytes(int index)
  {
    if (isNull(index))
    {
      return null;
    }
    else
    {
      byteBuf.putDouble(0, toDouble(index));
      return byteBuf.array();
    }
  }

  @Override
  public float toFloat(int index)
  {
    return (float) toDouble(index);
  }

  @Override
  public Object toObject(int index)
  {
    return isNull(index) ? null : toDouble(index);
  }

  @Override
  public String toString(int index)
  {
    return isNull(index) ? null : String.valueOf(toDouble(index));
  }

  @Override
  public boolean toBoolean(int index) throws SFException
  {
    if (isNull(index))
    {
      return false;
    }
    double val = toDouble(index);
    throw new SFException(ErrorCode.INVALID_VALUE_CONVERT, logicalTypeStr,
                          SnowflakeUtil.BOOLEAN_STR, val);
  }

  @Override
  public short toShort(int rowIndex) throws SFException
  {
    try
    {
      if (isNull(rowIndex))
      {
        return 0;
      }
      else
      {
        return (short) toDouble(rowIndex);
      }
    }
    catch (ClassCastException ex)
    {
      throw new SFException(ErrorCode.INVALID_VALUE_CONVERT,
                            logicalTypeStr,
                            SnowflakeUtil.SHORT_STR,
                            toObject(rowIndex));
    }
  }

  @Override
  public int toInt(int rowIndex) throws SFException
  {
    try
    {
      if (isNull(rowIndex))
      {
        return 0;
      }
      else
      {
        return (int) toDouble(rowIndex);
      }
    }
    catch (ClassCastException ex)
    {
      throw new SFException(ErrorCode.INVALID_VALUE_CONVERT,
                            logicalTypeStr,
                            SnowflakeUtil.INT_STR,
                            toObject(rowIndex));
    }
  }

  @Override
  public long toLong(int rowIndex) throws SFException
  {
    try
    {
      if (isNull(rowIndex))
      {
        return 0;
      }
      else
      {
        return (long) toDouble(rowIndex);
      }
    }
    catch (ClassCastException ex)
    {
      throw new SFException(ErrorCode.INVALID_VALUE_CONVERT,
                            logicalTypeStr,
                            SnowflakeUtil.LONG_STR,
                            toObject(rowIndex));
    }
  }

  @Override
  public BigDecimal toBigDecimal(int rowIndex) throws SFException
  {
    if (isNull(rowIndex))
    {
      return null;
    }
    return BigDecimal.valueOf(toDouble(rowIndex));
  }
}