net.snowflake.client.core.arrow.TinyIntToFixedConverter 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 org.apache.arrow.vector.TinyIntVector;
import org.apache.arrow.vector.ValueVector;

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

/**
 * A converter from arrow tinyint to Snowflake Fixed type converter
 */
public class TinyIntToFixedConverter extends AbstractArrowVectorConverter
{
  protected TinyIntVector tinyIntVector;
  protected int sfScale = 0;

  public TinyIntToFixedConverter(ValueVector fieldVector, int columnIndex, DataConversionContext context)
  {
    super(String.format("%s(%s,%s)", SnowflakeType.FIXED,
                        fieldVector.getField().getMetadata().get("precision"),
                        fieldVector.getField().getMetadata().get("scale")),
          fieldVector,
          columnIndex,
          context);
    this.tinyIntVector = (TinyIntVector) fieldVector;
  }

  @Override
  public byte toByte(int index) throws SFException
  {
    if (tinyIntVector.isNull(index))
    {
      return 0;
    }
    else
    {
      return getByte(index);
    }
  }

  @Override
  public byte[] toBytes(int index) throws SFException
  {
    if (tinyIntVector.isNull(index))
    {
      return null;
    }
    ByteBuffer bytes = ByteBuffer.allocate(TinyIntVector.TYPE_WIDTH);
    tinyIntVector.getDataBuffer().getBytes(index, bytes);
    return bytes.array();
  }

  protected byte getByte(int index) throws SFException
  {
    return tinyIntVector.getDataBuffer().getByte(
        index * TinyIntVector.TYPE_WIDTH);
  }

  @Override
  public short toShort(int index) throws SFException
  {
    return (short) toByte(index);
  }

  @Override
  public int toInt(int index) throws SFException
  {
    return (int) toByte(index);
  }

  @Override
  public float toFloat(int index) throws SFException
  {
    return toByte(index);
  }

  @Override
  public double toDouble(int index) throws SFException
  {
    return toFloat(index);
  }

  @Override
  public long toLong(int index) throws SFException
  {
    return (long) toByte(index);
  }

  @Override
  public BigDecimal toBigDecimal(int index) throws SFException
  {
    if (tinyIntVector.isNull(index))
    {
      return null;
    }
    else
    {
      return BigDecimal.valueOf((long) getByte(index), sfScale);
    }
  }

  @Override
  public Object toObject(int index) throws SFException
  {
    return isNull(index) ? null : (long) toByte(index);
  }

  @Override
  public String toString(int index) throws SFException
  {
    return isNull(index) ? null : Short.toString(getByte(index));
  }

  @Override
  public boolean toBoolean(int index) throws SFException
  {
    short val = toShort(index);
    if (val == 0)
    {
      return false;
    }
    else  if (val == 1)
    {
      return true;
    }
    else
    {
      throw new SFException(ErrorCode.INVALID_VALUE_CONVERT, logicalTypeStr,
          "Boolean", val);
    }
  }
}