Java Code Examples for java.math.BigDecimal#unscaledValue()

/**
 * Dumps out interesting bits of the {@link BigDecimal} state.
 * 
 * @return The dump.
 */
private String dumpBigDecimal(final BigDecimal i) {

  final BigInteger unscaled = i.unscaledValue();

  final String msg = i.toString() + ", scale=" + i.scale()
          + //
          ", precision=" + i.precision()
          + //
          ", unscaled=" + unscaled
          + //
          ", unscaled_byte[]="
          + BytesUtil.toString(unscaled.toByteArray())//
  ;

    return msg;

}
 

/**
 * Writes an unsorted {@code BigDecimal}.
 * 
 * @throws NullPointerException
 *           if val is null.
 * 
 * @see <a href="package-summary.html#bigDecimalFormats">BigDecimal Formats</a>
 */
public final HGDataOutput writeBigDecimal(BigDecimal val) {
	/*
	 * The byte format for a BigDecimal value is: Byte 0 ~ L: The scale part written as a PackedInteger. Byte
	 * L+1 ~ M: The length of the unscaled value written as a PackedInteger. Byte M+1 ~ N: The
	 * BigDecimal.toByteArray array, written without modification.
	 * 
	 * Get the scale and the unscaled value of this BigDecimal.
	 */
	int scale = val.scale();
	BigInteger unscaledVal = val.unscaledValue();

	/* Store the scale. */
	writePackedInt(scale);
	byte[] a = unscaledVal.toByteArray();
	int len = a.length;

	/* Store the length of the following bytes. */
	writePackedInt(len);

	/* Store the bytes of the BigDecimal, without modification. */
	writeFast(a, 0, len);
	return this;
}
 

/**
 * <p>BigInteger value of BigDecimal value.</p>
 *
 * @param value Value to convert.
 * @param canBeNull Can returned value be null?
 *
 * @return BigInteger value of BigDecimal, possibly null.
 */
private static BigInteger toBigInteger(
    BigDecimal value,
    boolean canBeNull) {
    if (canBeNull && value.signum() == 0) {
        return null;
    } else {
        return value.unscaledValue();
    }
}
 

/**
 * Write a BigDecimal value to the output stream.
 *
 * @param value The BigDecimal value to write.
 * @throws IOException
 */
void write(BigDecimal value) throws IOException {

    if (value == null) {
        write((byte) 0);
    } else {
        byte signum = (byte) (value.signum() < 0 ? 0 : 1);
        BigInteger bi = value.unscaledValue();
        byte mantisse[] = bi.abs().toByteArray();
        byte len = (byte) (mantisse.length + 1);

        if (len > getMaxDecimalBytes()) {
            // Should never happen now as value is normalized elsewhere
            throw new IOException("BigDecimal to big to send");
        }

        if (socket.serverType == Driver.SYBASE) {
            write(len);
            // Sybase TDS5 stores MSB first opposite sign!
            // length, prec, scale already sent in parameter descriptor.
            write((byte) ((signum == 0) ? 1 : 0));

            for (int i = 0; i < mantisse.length; i++) {
                write(mantisse[i]);
            }
        } else {
            write(len);
            write(signum);

            for (int i = mantisse.length - 1; i >= 0; i--) {
                write(mantisse[i]);
            }
        }
    }
}
 

protected void writeDecimal(BigDecimal o, Type type) {

        int        scale   = o.scale();
        BigInteger bigint  = o.unscaledValue();
        byte[]     bytearr = bigint.toByteArray();

        writeByteArray(bytearr);
        writeInt(scale);
    }
 

/**
 * <p>BigInteger value of BigDecimal value.</p>
 *
 * @param value Value to convert.
 * @param canBeNull Can returned value be null?
 *
 * @return BigInteger value of BigDecimal, possibly null.
 */
private static BigInteger toBigInteger(
    BigDecimal value,
    boolean canBeNull) {
    if (canBeNull && value.signum() == 0) {
        return null;
    } else {
        return value.unscaledValue();
    }
}
 

@Override
public void write(WriteBuffer buffer, BigDecimal attribute) {
    BigInteger unscaledVal = attribute.unscaledValue();
    int scale = attribute.scale();
    bigIntegerDelegate.write(buffer, unscaledVal);
    buffer.putInt(scale);
}
 

@Override
ByteBuffer encodeInternal(BigDecimal input) {
  BigInteger bi = input.unscaledValue();
  int scale = input.scale();
  byte[] bibytes = bi.toByteArray();

  ByteBuffer bytes = ByteBuffer.allocate(4 + bibytes.length);
  bytes.putInt(scale);
  bytes.put(bibytes);
  bytes.rewind();
  return bytes;
}
 

/**
 * @param val String value.
 */
public void doWriteDecimal(@Nullable BigDecimal val) {
    if (val == null)
        out.writeByte(GridBinaryMarshaller.NULL);
    else {
        out.unsafeEnsure(1 + 4 + 4);

        out.unsafeWriteByte(GridBinaryMarshaller.DECIMAL);

        out.unsafeWriteInt(val.scale());

        BigInteger intVal = val.unscaledValue();

        boolean negative = intVal.signum() == -1;

        if (negative)
            intVal = intVal.negate();

        byte[] vals = intVal.toByteArray();

        if (negative)
            vals[0] |= -0x80;

        out.unsafeWriteInt(vals.length);
        out.writeByteArray(vals);
    }
}
 

/**
 * <p>BigInteger value of BigDecimal value.</p>
 *
 * @param value Value to convert.
 * @param canBeNull Can returned value be null?
 *
 * @return BigInteger value of BigDecimal, possibly null.
 */
private static BigInteger toBigInteger(
    BigDecimal value,
    boolean canBeNull) {
    if (canBeNull && value.signum() == 0) {
        return null;
    } else {
        return value.unscaledValue();
    }
}
 

@Override
public void write(WriteBuffer buffer, BigDecimal attribute) {
    BigInteger unscaledVal = attribute.unscaledValue();
    int scale = attribute.scale();
    bigIntegerDelegate.write(buffer, unscaledVal);
    buffer.putInt(scale);
}
 

public static Number rationalize(BigDecimal number) {
    BigInteger unscaled = number.unscaledValue();
    int scale = number.scale();
    if (scale < 0) {
        return unscaled.multiply(BigInteger.TEN.pow(-scale));
    }
    return unscaled.divide(BigInteger.TEN.pow(scale));
}
 

private void assertExecute(List<String> expressions, BigDecimal decimal)
{
    Type type = getDecimalType(decimal);
    SqlDecimal value = decimal == null ? null : new SqlDecimal(decimal.unscaledValue(), decimal.precision(), decimal.scale());
    for (String expression : expressions) {
        assertExecute(expression, type, value);
    }
}
 

@Override
protected SqlDecimal getExpectedValue(int start, int length)
{
    if (length == 0) {
        return null;
    }
    BigDecimal avg = BigDecimal.ZERO;
    for (int i = start; i < start + length; i++) {
        avg = avg.add(getBigDecimalForCounter(i));
    }
    avg = avg.divide(BigDecimal.valueOf(length), ROUND_HALF_UP);
    return new SqlDecimal(avg.unscaledValue(), avg.precision(), avg.scale());
}
 

/**
 * Returns a "plain" {@link BigDecimal} instance, never a {@link Decimal}
 * subclass.  As a side effect, this strips any negative-zero information.
 *
 * @param val may be null.
 * @return {@code null} if the given value is {@code null}.
 */
public static BigDecimal bigDecimalValue(BigDecimal val)
{
    if (val == null
        || val.getClass() == BigDecimal.class)
    {
        return val;
    }
    return new BigDecimal(val.unscaledValue(), val.scale());
}
 

public Quantity(BigDecimal bigDecimal) {
    value = new BigDecimal(bigDecimal.unscaledValue(), bigDecimal.scale(), new MathContext(bigDecimal.precision()));
}
 

private int writeDecimal(BigDecimal value, UserByteWriter userWriter) throws IOException
{
    int returnlen = 0;
    // we only write out the '0' value as the nibble 0
    if (value != null && !BigDecimal.ZERO.equals(value)) {
        // otherwise we do it the hard way ....
        BigInteger mantissa = value.unscaledValue();

        boolean isNegative = (mantissa.compareTo(BigInteger.ZERO) < 0);
        if (isNegative) {
            mantissa = mantissa.negate();
        }

        byte[] bits  = mantissa.toByteArray();
        int    scale = value.scale();

        // Ion stores exponent, BigDecimal uses the negation "scale"
        int exponent = -scale;
        if (userWriter != null) {
            returnlen += userWriter.writeIonInt(exponent, IonBinary.lenVarUInt(exponent));
        }
        else {
            returnlen += this.writeIonInt(exponent, IonBinary.lenVarUInt(exponent));
        }

        // If the first bit is set, we can't use it for the sign,
        // and we need to write an extra byte to hold it.
        boolean needExtraByteForSign = ((bits[0] & 0x80) != 0);
        if (needExtraByteForSign)
        {
            if (userWriter != null) {
                userWriter.write((byte)(isNegative ? 0x80 : 0x00));
            }
            else {
                this.write((byte)(isNegative ? 0x80 : 0x00));
            }
            returnlen++;
        }
        else if (isNegative)
        {
            bits[0] |= 0x80;
        }
        // if we have a userWriter to write to, we really don't care about
        // the value in our local buffer.
        if (userWriter != null) {
            userWriter.write(bits, 0, bits.length);
        }
        else {
            this.write(bits, 0, bits.length);
        }
        returnlen += bits.length;
    }
    return returnlen;
}
 

public void writeTimestamp(final Timestamp value) throws IOException
{
    if (value == null)
    {
        writeNull(IonType.TIMESTAMP);
        return;
    }
    prepareValue();

    // optimistically try to fit a timestamp length in low nibble (most should)
    updateLength(1);
    pushContainer(ContainerType.VALUE);
    buffer.writeByte(TIMESTAMP_TYPE);

    // OFFSET
    final Integer offset = value.getLocalOffset();
    if (offset == null)
    {
        // special case for unknown -00:00
        updateLength(1);
        buffer.writeByte(VARINT_NEG_ZERO);
    }
    else
    {
        writeVarInt(offset.intValue());
    }

    // YEAR
    final int year = value.getZYear();
    writeVarUInt(year);

    // XXX it is really convenient to rely on the ordinal
    final int precision = value.getPrecision().ordinal();

    if (precision >= MONTH.ordinal())
    {
        final int month = value.getZMonth();
        writeVarUInt(month);
    }
    if (precision >= DAY.ordinal())
    {
        final int day = value.getZDay();
        writeVarUInt(day);
    }
    if (precision >= MINUTE.ordinal())
    {
        final int hour = value.getZHour();
        writeVarUInt(hour);
        final int minute = value.getZMinute();
        writeVarUInt(minute);
    }
    if (precision >= SECOND.ordinal())
    {
        final int second = value.getZSecond();
        writeVarUInt(second);
        final BigDecimal fraction = value.getZFractionalSecond();
        if (fraction != null) {
            final BigInteger mantissaBigInt = fraction.unscaledValue();
            final int exponent = -fraction.scale();
            if (!(mantissaBigInt.equals(BigInteger.ZERO) && exponent > -1)) {
                writeDecimalValue(fraction);
            }
        }
    }

    final ContainerInfo info = popContainer();
    patchSingleByteTypedOptimisticValue(TIMESTAMP_TYPE, info);

    finishValue();
}
 

/**
 * @return whether a BigDecimal is a valid Farrago decimal. If a
 * BigDecimal's unscaled value overflows a long, then it is not a valid
 * Farrago decimal.
 */
public static boolean isValidDecimal(BigDecimal bd) {
  BigInteger usv = bd.unscaledValue();
  long usvl = usv.longValue();
  return usv.equals(BigInteger.valueOf(usvl));
}
 

public void printDecimal(_Private_IonTextWriterBuilder _options,
                         BigDecimal                    value)
    throws IOException
{
    if (value == null)
    {
        appendAscii("null.decimal");
        return;
    }

    BigInteger unscaled = value.unscaledValue();

    int signum = value.signum();
    if (signum < 0)
    {
        appendAscii('-');
        unscaled = unscaled.negate();
    }
    else if (value instanceof Decimal
         && ((Decimal)value).isNegativeZero())
    {
        // for the various forms of negative zero we have to
        // write the sign ourselves, since neither BigInteger
        // nor BigDecimal recognize negative zero, but Ion does.
        appendAscii('-');
    }

    final String unscaledText = unscaled.toString();
    final int significantDigits = unscaledText.length();

    final int scale = value.scale();
    final int exponent = -scale;

    if (_options._decimal_as_float)
    {
        appendAscii(unscaledText);
        appendAscii('e');
        appendAscii(Integer.toString(exponent));
    }
    else if (exponent == 0)
    {
        appendAscii(unscaledText);
        appendAscii('.');
    }
    else if (exponent < 0)
    {
        // Avoid printing small negative exponents using a heuristic
        // adapted from http://speleotrove.com/decimal/daconvs.html

        final int adjustedExponent = significantDigits - 1 - scale;
        if (adjustedExponent >= 0)
        {
            int wholeDigits = significantDigits - scale;
            appendAscii(unscaledText, 0, wholeDigits);
            appendAscii('.');
            appendAscii(unscaledText, wholeDigits,
                                significantDigits);
        }
        else if (adjustedExponent >= -6)
        {
            appendAscii("0.");
            appendAscii("00000", 0, scale - significantDigits);
            appendAscii(unscaledText);
        }
        else
        {
            appendAscii(unscaledText);
            appendAscii("d-");
            appendAscii(Integer.toString(scale));
        }
    }
    else // (exponent > 0)
    {
        // We cannot move the decimal point to the right, adding
        // rightmost zeros, because that would alter the precision.
        appendAscii(unscaledText);
        appendAscii('d');
        appendAscii(Integer.toString(exponent));
    }
}