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

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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.ValueVector;

import java.math.BigDecimal;

/**
 * Data vector whose snowflake logical type is fixed while represented as a
 * scaled short value vector
 */
public class SmallIntToScaledFixedConverter extends SmallIntToFixedConverter
{
  private String format;

  public SmallIntToScaledFixedConverter(ValueVector fieldVector, int columnIndex, DataConversionContext context,
                                        int sfScale)
  {
    super(fieldVector,
          columnIndex,
          context);
    logicalTypeStr = String.format("%s(%s,%s)", SnowflakeType.FIXED,
                                   fieldVector.getField().getMetadata().get("precision"),
                                   fieldVector.getField().getMetadata().get("scale"));
    format = ArrowResultUtil.getStringFormat(sfScale);
    this.sfScale = sfScale;
  }

  @Override
  public float toFloat(int index) throws SFException
  {
    if (isNull(index))
    {
      return 0;
    }
    return ((float) getShort(index)) / ArrowResultUtil.powerOfTen(sfScale);
  }

  @Override
  public short toShort(int index) throws SFException
  {
    if (isNull(index))
    {
      return 0;
    }
    float val = toFloat(index);
    throw new SFException(ErrorCode.INVALID_VALUE_CONVERT, logicalTypeStr,
                          "Short", val);
  }

  @Override
  public int toInt(int index) throws SFException
  {
    if (isNull(index))
    {
      return 0;
    }
    float val = toFloat(index);
    throw new SFException(ErrorCode.INVALID_VALUE_CONVERT, logicalTypeStr,
                          "Int", val);
  }

  @Override
  public long toLong(int index) throws SFException
  {
    if (isNull(index))
    {
      return 0;
    }
    float val = toFloat(index);
    throw new SFException(ErrorCode.INVALID_VALUE_CONVERT, logicalTypeStr,
                          "Long", val);
  }

  @Override
  public Object toObject(int index) throws SFException
  {
    return toBigDecimal(index);
  }

  @Override
  public String toString(int index) throws SFException
  {
    return isNull(index) ? null :
           String.format(format, (float) getShort(index) / ArrowResultUtil.powerOfTen(sfScale));
  }

  @Override
  public boolean toBoolean(int index) throws SFException
  {
    if (isNull(index))
    {
      return false;
    }
    BigDecimal val = toBigDecimal(index);
    if (val.compareTo(BigDecimal.ZERO) == 0)
    {
      return false;
    }
    else if (val.compareTo(BigDecimal.ONE) == 0)
    {
      return true;
    }
    else
    {
      throw new SFException(ErrorCode.INVALID_VALUE_CONVERT, logicalTypeStr,
                            "Boolean", val.toPlainString());
    }
  }
}