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

/**
 * Returns the remainder (modulus) of A / B.
 *
 * @param metaA
 * @param dataA
 *          The dividend
 * @param metaB
 * @param dataB
 *          The divisor
 * @return The remainder
 * @throws KettleValueException
 */
public static Object remainder( ValueMetaInterface metaA, Object dataA, ValueMetaInterface metaB, Object dataB ) throws KettleValueException {
  if ( dataA == null || dataB == null ) {
    return null;
  }

  switch ( metaA.getType() ) {
    case ValueMetaInterface.TYPE_NUMBER:
      return new Double( metaA.getNumber( dataA ).doubleValue() % metaB.getNumber( dataB ).doubleValue() );
    case ValueMetaInterface.TYPE_INTEGER:
      return new Long( metaA.getInteger( dataA ) % metaB.getInteger( dataB ) );
    case ValueMetaInterface.TYPE_BIGNUMBER:
      BigDecimal aValue = metaA.getBigNumber( dataA );
      BigDecimal bValue = metaA.getBigNumber( dataB );
      BigDecimal result = aValue.remainder( bValue, MathContext.UNLIMITED );
      return removeTrailingZeroFractionOrScale( result );
    default:
      throw new KettleValueException( "The 'remainder' function only works on numeric data" );
  }
}
 

/**
 * remainder(BigDecimal, MathContext)
 */
public void testRemainderMathContextHALF_DOWN() {
    String a = "3736186567876876578956958765675671119238118911893939591735";
    int aScale = -45;
    String b = "134432345432345748766876876723342238476237823787879183470";
    int bScale = 10;
    int precision = 75;
    RoundingMode rm = RoundingMode.HALF_DOWN;
    MathContext mc = new MathContext(precision, rm);
    String res = "1149310942946292909508821656680979993738625937.2065885780";
    int resScale = 10;
    BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
    BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
    BigDecimal result = aNumber.remainder(bNumber, mc);
    assertEquals("incorrect quotient value", res, result.toString());
    assertEquals("incorrect quotient scale", resScale, result.scale());
}
 

/**
 * @param price        price to be rounded, has to be positive
 * @param roundingMode rounding mode that should be used (only {@link RoundingMode#UP} and {@link RoundingMode#DOWN}
 *                     are supported)
 * @return price rounded to tick size
 *
 * @throws IllegalArgumentException if {@code roundingMode} is neither {@link RoundingMode#UP} nor
 *                                  {@link RoundingMode#DOWN} or {@code price} is not positive
 */
static BigDecimal roundPriceToTickSize(final BigDecimal price, final RoundingMode roundingMode, final BigDecimal tickSize) {
    checkArgument(
        roundingMode == RoundingMode.UP || roundingMode == RoundingMode.DOWN,
        "Only rounding UP or DOWN supported"
    );
    checkArgument(price.compareTo(BigDecimal.ZERO) >= 0, "price=%s < 0", price);

    final BigDecimal remainder = price.remainder(tickSize);
    if (remainder.compareTo(BigDecimal.ZERO) == 0) {
        return price;
    }

    final BigDecimal result = price.subtract(remainder);
    if (roundingMode == RoundingMode.UP) {
        return result.add(tickSize);
    } else {
        return result;
    }
}
 

public static String getPrettyCheckSum(String digest) {
    int digestLength = digest.length();
    if ((digestLength % 2) == 1) {
        digest = "0" + digest;
        digestLength++;
    }

    byte[] result = new byte[digestLength / 2];

    for (int i = 0, min = 0, max = 2; max <= digestLength; min += 2, max += 2, i++) {
        result[i] = (byte) Integer.parseInt(digest.substring(min, max), 16);
    }

    BigDecimal bigDecimal = new BigDecimal("17");
    BigDecimal bigDecimal2 = new BigDecimal("101");

    for (int i = result.length; i > 0; i--) {
        short a = (short) (0xFF & result[i - 1]);
        bigDecimal = bigDecimal.multiply(bigDecimal2).add(BigDecimal.valueOf(a + i));
    }

    BigDecimal result2 = bigDecimal.remainder(new BigDecimal("99997"));
    return result2.abs().toPlainString();
}
 

@Override
public Object doWork(Object first, Object second) throws IOException{
  if(null == first){
    throw new IOException(String.format(Locale.ROOT,"Unable to %s(...) with a null numerator", constructingFactory.getFunctionName(getClass())));
  }
  
  if(null == second){
    throw new IOException(String.format(Locale.ROOT,"Unable to %s(...) with a null denominator", constructingFactory.getFunctionName(getClass())));
  }
  
  BigDecimal numerator = (BigDecimal)first;
  BigDecimal denominator = (BigDecimal)second;
  
  if(0 == denominator.compareTo(BigDecimal.ZERO)){
    throw new IOException(String.format(Locale.ROOT,"Unable to %s(...) with a 0 denominator", constructingFactory.getFunctionName(getClass())));
  }
  
  return numerator.remainder(denominator, MathContext.DECIMAL64);
}
 

@Override
public void compute(final C input, final UnsignedLongType output) {
	final BigDecimal bd = BigDecimal.valueOf(input.getRealDouble());
	final BigDecimal r = bd.remainder(BigDecimal.ONE);
	if (r.compareTo(BigDecimal.ZERO) == 0) {
		output.set(bd.toBigIntegerExact().longValue());
	}
	else {
		output.set(bd.toBigInteger().longValue());
	}
}
 

@Override
public void compute(final C input, final Unsigned128BitType output) {
	final BigDecimal bd = BigDecimal.valueOf(input.getRealDouble());
	final BigDecimal r = bd.remainder(BigDecimal.ONE);
	if (r.compareTo(BigDecimal.ZERO) == 0) {
		output.set(bd.toBigIntegerExact());
	}
	else {
		output.set(bd.toBigInteger());
	}
}
 

/**
 * Calculates the sine (sinus) of {@link BigDecimal} x.
 * 
 * <p>See: <a href="http://en.wikipedia.org/wiki/Sine">Wikipedia: Sine</a></p>
 * 
 * @param x the {@link BigDecimal} to calculate the sine for
 * @param mathContext the {@link MathContext} used for the result
 * @return the calculated sine {@link BigDecimal} with the precision specified in the <code>mathContext</code>
 * @throws UnsupportedOperationException if the {@link MathContext} has unlimited precision
 */
public static BigDecimal sin(BigDecimal x, MathContext mathContext) {
	checkMathContext(mathContext);
	MathContext mc = new MathContext(mathContext.getPrecision() + 6, mathContext.getRoundingMode());

	if (x.abs().compareTo(ROUGHLY_TWO_PI) > 0) {
		MathContext mc2 = new MathContext(mc.getPrecision() + 4, mathContext.getRoundingMode());
		BigDecimal twoPi = TWO.multiply(pi(mc2));
		x = x.remainder(twoPi, mc2);
	}

	BigDecimal result = SinCalculator.INSTANCE.calculate(x, mc);
	return round(result, mathContext);
}
 

/**
 * Calculates the cosine (cosinus) of {@link BigDecimal} x.
 * 
 * <p>See: <a href="http://en.wikipedia.org/wiki/Cosine">Wikipedia: Cosine</a></p>
 * 
 * @param x the {@link BigDecimal} to calculate the cosine for
 * @param mathContext the {@link MathContext} used for the result
 * @return the calculated cosine {@link BigDecimal} with the precision specified in the <code>mathContext</code>
 * @throws UnsupportedOperationException if the {@link MathContext} has unlimited precision
 */
public static BigDecimal cos(BigDecimal x, MathContext mathContext) {
	checkMathContext(mathContext);
	MathContext mc = new MathContext(mathContext.getPrecision() + 6, mathContext.getRoundingMode());

	if (x.abs().compareTo(ROUGHLY_TWO_PI) > 0) {
		MathContext mc2 = new MathContext(mc.getPrecision() + 4, mathContext.getRoundingMode());
		BigDecimal twoPi = TWO.multiply(pi(mc2), mc2);
		x = x.remainder(twoPi, mc2);
	}
	
	BigDecimal result = CosCalculator.INSTANCE.calculate(x, mc);
	return round(result, mathContext);
}
 

static Object bigDecimalBinaryOperation(BigDecimal lhs, BigDecimal rhs, int kind)
    throws UtilEvalError
{
    switch(kind)
    {
        // arithmetic
        case PLUS:
            return lhs.add(rhs);

        case MINUS:
            return lhs.subtract(rhs);

        case STAR:
            return lhs.multiply(rhs);

        case SLASH:
            return lhs.divide(rhs);

        case MOD:
        case MODX:
            return lhs.remainder(rhs);

        case POWER:
        case POWERX:
            return lhs.pow(rhs.intValue());

        // can't shift floats
        case LSHIFT:
        case LSHIFTX:
        case RSIGNEDSHIFT:
        case RSIGNEDSHIFTX:
        case RUNSIGNEDSHIFT:
        case RUNSIGNEDSHIFTX:
            throw new UtilEvalError("Can't shift floatingpoint values");

    }
    throw new InterpreterError(
            "Unimplemented binary float operator");
}
 

/**
 * Compute the sine of x to a given scale
 * @param x 
 *      the value of x
 * @param 
 *      scale the desired scale of the result
 * @return the result value
 */
public static BigDecimal sin(BigDecimal x, int scale)
{
    if (x.signum() == 0)
    	return BigDecimal.ZERO;
    if (x.abs().compareTo(sincosNormalizePoint) >= 0 ) {
     x = x.remainder(twoPI, new MathContext(scale + 1));
    }
    if (x.signum() == -1)
        return sinTaylor(x.negate(), scale).negate();
    else 
    	return sinTaylor(x, scale);
}
 

/**
 * remainder(BigDecimal)
 */
public void testRemainder1() {
    String a = "3736186567876876578956958765675671119238118911893939591735";
    int aScale = 45;
    String b = "134432345432345748766876876723342238476237823787879183470";
    int bScale = 10;
    String res = "3736186567876.876578956958765675671119238118911893939591735";
    int resScale = 45;
    BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
    BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
    BigDecimal result = aNumber.remainder(bNumber);
    assertEquals("incorrect quotient value", res, result.toString());
    assertEquals("incorrect quotient scale", resScale, result.scale());
}
 

/**
 * Function converts the BigDecimal and stores it in out internal sparse representation
 */
public static void getSparseFromBigDecimal(BigDecimal input, ByteBuf data, int startIndex, int scale, int nDecimalDigits) {

  // Initialize the buffer
  data.setZero(startIndex, nDecimalDigits * INTEGER_SIZE);

  boolean sign = false;

  if (input.signum() == -1) {
    // negative input
    sign = true;
    input = input.abs();
  }

  // Truncate the input as per the scale provided
  input = input.setScale(scale, BigDecimal.ROUND_HALF_UP);

  // Separate out the integer part
  BigDecimal integerPart = input.setScale(0, BigDecimal.ROUND_DOWN);

  int destIndex = nDecimalDigits - roundUp(scale) - 1;

  // we use base 1 billion integer digits for out internal representation
  BigDecimal base = new BigDecimal(DIGITS_BASE);

  while (integerPart.compareTo(BigDecimal.ZERO) == 1) {
    // store the modulo as the integer value
    data.setInt(startIndex + destIndex * INTEGER_SIZE, integerPart.remainder(base).intValue());
    destIndex--;
    // Divide by base 1 billion
    integerPart = integerPart.divide(base, BigDecimal.ROUND_DOWN).setScale(0, BigDecimal.ROUND_DOWN);
  }

  /* Sparse representation contains padding of additional zeroes
   * so each digit contains MAX_DIGITS for ease of arithmetic
   */
  int actualDigits = scale % MAX_DIGITS;
  if (actualDigits != 0) {
    // Pad additional zeroes
    scale = scale + MAX_DIGITS - actualDigits;
    input = input.setScale(scale, BigDecimal.ROUND_DOWN);
  }

  //separate out the fractional part
  BigDecimal fractionalPart = input.remainder(BigDecimal.ONE).movePointRight(scale);

  destIndex = nDecimalDigits - 1;

  while (scale > 0) {
    // Get next set of MAX_DIGITS (9) store it in the DrillBuf
    fractionalPart = fractionalPart.movePointLeft(MAX_DIGITS);
    BigDecimal temp = fractionalPart.remainder(BigDecimal.ONE);

    data.setInt(startIndex + destIndex * INTEGER_SIZE, temp.unscaledValue().intValue());
    destIndex--;

    fractionalPart = fractionalPart.setScale(0, BigDecimal.ROUND_DOWN);
    scale -= MAX_DIGITS;
  }

  // Set the negative sign
  if (sign) {
    data.setInt(startIndex, data.getInt(startIndex) | 0x80000000);
  }
}
 

@Override
public TypedValue getValueInternal(ExpressionState state) throws EvaluationException {
	Object leftOperand = getLeftOperand().getValueInternal(state).getValue();
	Object rightOperand = getRightOperand().getValueInternal(state).getValue();

	if (leftOperand instanceof Number && rightOperand instanceof Number) {
		Number leftNumber = (Number) leftOperand;
		Number rightNumber = (Number) rightOperand;

		if (leftNumber instanceof BigDecimal || rightNumber instanceof BigDecimal) {
			BigDecimal leftBigDecimal = NumberUtils.convertNumberToTargetClass(leftNumber, BigDecimal.class);
			BigDecimal rightBigDecimal = NumberUtils.convertNumberToTargetClass(rightNumber, BigDecimal.class);
			return new TypedValue(leftBigDecimal.remainder(rightBigDecimal));
		}
		else if (leftNumber instanceof Double || rightNumber instanceof Double) {
			this.exitTypeDescriptor = "D";
			return new TypedValue(leftNumber.doubleValue() % rightNumber.doubleValue());
		}
		else if (leftNumber instanceof Float || rightNumber instanceof Float) {
			this.exitTypeDescriptor = "F";
			return new TypedValue(leftNumber.floatValue() % rightNumber.floatValue());
		}
		else if (leftNumber instanceof BigInteger || rightNumber instanceof BigInteger) {
			BigInteger leftBigInteger = NumberUtils.convertNumberToTargetClass(leftNumber, BigInteger.class);
			BigInteger rightBigInteger = NumberUtils.convertNumberToTargetClass(rightNumber, BigInteger.class);
			return new TypedValue(leftBigInteger.remainder(rightBigInteger));
		}
		else if (leftNumber instanceof Long || rightNumber instanceof Long) {
			this.exitTypeDescriptor = "J";
			return new TypedValue(leftNumber.longValue() % rightNumber.longValue());
		}
		else if (CodeFlow.isIntegerForNumericOp(leftNumber) || CodeFlow.isIntegerForNumericOp(rightNumber)) {
			this.exitTypeDescriptor = "I";
			return new TypedValue(leftNumber.intValue() % rightNumber.intValue());
		}
		else {
			// Unknown Number subtypes -> best guess is double division
			return new TypedValue(leftNumber.doubleValue() % rightNumber.doubleValue());
		}
	}

	return state.operate(Operation.MODULUS, leftOperand, rightOperand);
}
 

@Override
public Object mod(Object v1, Object v2) {
    BigDecimal i1 = convertFrom(v1);
    BigDecimal i2 = convertFrom(v2);
    return i1.remainder(i2);
}
 

@Override
protected YangExpr doEvaluate(final YangBinaryOperator operator, final BigDecimalNumberExpr left,
        final BigDecimalNumberExpr right) {
    final BigDecimal l = left.getNumber();
    final BigDecimal r = right.getNumber();

    final BigDecimal result;
    switch (operator) {
        case DIV:
            result = l.divide(r);
            break;
        case EQUALS:
            return YangBooleanConstantExpr.of(l.equals(r));
        case GT:
            return YangBooleanConstantExpr.of(l.compareTo(r) > 0);
        case GTE:
            return YangBooleanConstantExpr.of(l.compareTo(r) >= 0);
        case LT:
            return YangBooleanConstantExpr.of(l.compareTo(r) < 0);
        case LTE:
            return YangBooleanConstantExpr.of(l.compareTo(r) <= 0);
        case MINUS:
            result = l.subtract(r);
            break;
        case MOD:
            result = l.remainder(r);
            break;
        case MUL:
            result = l.multiply(r);
            break;
        case NOT_EQUALS:
            return YangBooleanConstantExpr.of(!l.equals(r));
        case PLUS:
            result = l.add(r);
            break;
        default:
            throw new IllegalStateException("Unhandled operator " + operator);
    }

    return BigDecimalNumberExpr.of(result);
}
 

@Override
public Object operate(SyntaxNode left, SyntaxNode right, StringContext stringContext) {

    Object leftValue = left.calculate(stringContext);
    Object rightValue = right.calculate(stringContext);
    if (leftValue == null || rightValue == null) {
        throw new EvaluateException("operate is null,left: " + leftValue + "  right:" + rightValue);
    }
    // 左右都不为空,开始计算
    // step one think as number
    if (leftValue instanceof Number && rightValue instanceof Number) {
        // 都是整数,则执行整数除法
        if (leftValue instanceof Integer && rightValue instanceof Integer) {
            return (Integer) leftValue % (Integer) rightValue;
        }

        // 包含小数,转double执行除法
        if (leftValue instanceof Double || rightValue instanceof Double || leftValue instanceof Float
                || rightValue instanceof Float) {
            return ((Number) leftValue).doubleValue() % ((Number) rightValue).doubleValue();
        }

        // 包含BigDecimal 转bigDecimal
        if (leftValue instanceof BigDecimal || rightValue instanceof BigDecimal) {
            if (leftValue instanceof BigDecimal && rightValue instanceof BigDecimal) {
                return ((BigDecimal) leftValue).remainder((BigDecimal) rightValue);
            }

            BigDecimal newLeft = XpathUtil.toBigDecimal((Number) leftValue);
            BigDecimal newRight = XpathUtil.toBigDecimal((Number) rightValue);
            return newLeft.remainder(newRight);
        }

        // 包含长整数,且不包含小数,全部转化为长整数计算
        if (leftValue instanceof Long || rightValue instanceof Long) {
            return ((Number) leftValue).longValue() % ((Number) rightValue).longValue();
        }

        // 兜底,用double执行计算
        return ((Number) leftValue).doubleValue() % ((Number) rightValue).doubleValue();
    }

    throw new EvaluateException(
            "remainder operate must with number parameter left:" + leftValue + " right:" + rightValue);

}
 

public static void getSparseFromBigDecimal(BigDecimal input, ByteBuf data, int startIndex,
                                           int scale, int nDecimalDigits) {

  // Initialize the buffer
  for (int i = 0; i < nDecimalDigits; i++) {
    data.setInt(startIndex + (i * INTEGER_SIZE), 0);
  }

  boolean sign = false;

  if (input.signum() == -1) {
    // negative input
    sign = true;
    input = input.abs();
  }

  // Truncate the input as per the scale provided
  input = input.setScale(scale, BigDecimal.ROUND_HALF_UP);

  // Separate out the integer part
  BigDecimal integerPart = input.setScale(0, BigDecimal.ROUND_DOWN);

  int destIndex = nDecimalDigits - roundUp(scale) - 1;

  while (integerPart.compareTo(BigDecimal.ZERO) > 0) {
    // store the modulo as the integer value
    data.setInt(startIndex + (destIndex * INTEGER_SIZE), (integerPart.remainder(BASE_BIGDECIMAL)).intValue());
    destIndex--;
    // Divide by base 1 billion
    integerPart = (integerPart.divide(BASE_BIGDECIMAL)).setScale(0, BigDecimal.ROUND_DOWN);
  }

  /* Sparse representation contains padding of additional zeroes
   * so each digit contains MAX_DIGITS for ease of arithmetic
   */
  int actualDigits = scale % MAX_DIGITS;
  if (actualDigits != 0) {
    // Pad additional zeroes
    scale = scale + (MAX_DIGITS - actualDigits);
    input = input.setScale(scale, BigDecimal.ROUND_DOWN);
  }

  //separate out the fractional part
  BigDecimal fractionalPart = input.remainder(BigDecimal.ONE).movePointRight(scale);

  destIndex = nDecimalDigits - 1;

  while (scale > 0) {
    // Get next set of MAX_DIGITS (9) store it in the DrillBuf
    fractionalPart = fractionalPart.movePointLeft(MAX_DIGITS);
    BigDecimal temp = fractionalPart.remainder(BigDecimal.ONE);

    data.setInt(startIndex + (destIndex * INTEGER_SIZE), (temp.unscaledValue().intValue()));
    destIndex--;

    fractionalPart = fractionalPart.setScale(0, BigDecimal.ROUND_DOWN);
    scale -= MAX_DIGITS;
  }

  // Set the negative sign
  if (sign) {
    data.setInt(startIndex, data.getInt(startIndex) | 0x80000000);
  }
}
 

@Override
public TypedValue getValueInternal(ExpressionState state) throws EvaluationException {
	Object leftOperand = getLeftOperand().getValueInternal(state).getValue();
	Object rightOperand = getRightOperand().getValueInternal(state).getValue();

	if (leftOperand instanceof Number && rightOperand instanceof Number) {
		Number leftNumber = (Number) leftOperand;
		Number rightNumber = (Number) rightOperand;

		if (leftNumber instanceof BigDecimal || rightNumber instanceof BigDecimal) {
			BigDecimal leftBigDecimal = NumberUtils.convertNumberToTargetClass(leftNumber, BigDecimal.class);
			BigDecimal rightBigDecimal = NumberUtils.convertNumberToTargetClass(rightNumber, BigDecimal.class);
			return new TypedValue(leftBigDecimal.remainder(rightBigDecimal));
		}
		else if (leftNumber instanceof Double || rightNumber instanceof Double) {
			this.exitTypeDescriptor = "D";
			return new TypedValue(leftNumber.doubleValue() % rightNumber.doubleValue());
		}
		else if (leftNumber instanceof Float || rightNumber instanceof Float) {
			this.exitTypeDescriptor = "F";
			return new TypedValue(leftNumber.floatValue() % rightNumber.floatValue());
		}
		else if (leftNumber instanceof BigInteger || rightNumber instanceof BigInteger) {
			BigInteger leftBigInteger = NumberUtils.convertNumberToTargetClass(leftNumber, BigInteger.class);
			BigInteger rightBigInteger = NumberUtils.convertNumberToTargetClass(rightNumber, BigInteger.class);
			return new TypedValue(leftBigInteger.remainder(rightBigInteger));
		}
		else if (leftNumber instanceof Long || rightNumber instanceof Long) {
			this.exitTypeDescriptor = "J";
			return new TypedValue(leftNumber.longValue() % rightNumber.longValue());
		}
		else if (CodeFlow.isIntegerForNumericOp(leftNumber) || CodeFlow.isIntegerForNumericOp(rightNumber)) {
			this.exitTypeDescriptor = "I";
			return new TypedValue(leftNumber.intValue() % rightNumber.intValue());
		}
		else {
			// Unknown Number subtypes -> best guess is double division
			return new TypedValue(leftNumber.doubleValue() % rightNumber.doubleValue());
		}
	}

	return state.operate(Operation.MODULUS, leftOperand, rightOperand);
}
 

/**
 * Returns the {@link BigDecimal} that is <code>x % y</code> using the current {@link MathContext}.
 *
 * @param x the x value
 * @param y the y value to divide
 * @return the resulting {@link BigDecimal} with the precision specified in the current {@link MathContext}
 * @see #currentMathContext()
 * @see BigDecimal#remainder(BigDecimal, MathContext)
 */
public static BigDecimal remainder(BigDecimal x, BigDecimal y) {
    return x.remainder(y, currentMathContext());
}