Examples of java.math.BigDecimal.signum()

java.math.BigDecimal.signum()
Returns the signum function of this {@code BigDecimal}. @return -1, 0, or 1 as the value of this {@code BigDecimal} is negative, zero, or positive.


    public DecimalValue divide(DurationValue other) throws XPathException {
        if (other instanceof YearMonthDurationValue) {
            BigDecimal v1 = BigDecimal.valueOf(getLengthInMonths());
            BigDecimal v2 = BigDecimal.valueOf(((YearMonthDurationValue)other).getLengthInMonths());
            if (v2.signum() == 0) {
                XPathException err = new XPathException("Divide by zero (durations)");
                err.setErrorCode("FOAR0001");
                throw err;
            }
            return new DecimalValue(v1.divide(v2, 20, BigDecimal.ROUND_HALF_EVEN));

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    private static class DecimalIdivDecimal extends Calculator {
        public AtomicValue compute(AtomicValue a, AtomicValue b, XPathContext c) throws XPathException {
            final BigDecimal A = ((NumericValue)a).getDecimalValue();
            final BigDecimal B = ((NumericValue)b).getDecimalValue();
            if (B.signum() == 0) {
                throw new XPathException("Integer division by zero", "FOAR0001", c);
            }
            BigDecimal quot = A.divideToIntegralValue(B);
            return IntegerValue.decimalToInteger(quot).asAtomic();
        }

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     */
    public DecimalValue divide(DurationValue other) throws XPathException {
        if (other instanceof DayTimeDurationValue) {
            BigDecimal v1 = BigDecimal.valueOf(getLengthInMicroseconds());
            BigDecimal v2 = BigDecimal.valueOf(((DayTimeDurationValue)other).getLengthInMicroseconds());
            if (v2.signum() == 0) {
                XPathException err = new XPathException("Divide by zero (durations)");
                err.setErrorCode("FOAR0001");
                throw err;
            }
            return new DecimalValue(v1.divide(v2, 20, BigDecimal.ROUND_HALF_EVEN));

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         */
                BigDecimal x = parameters.get(0);
                if (x.compareTo(BigDecimal.ZERO) == 0) {
                    return new BigDecimal(0);
                }
                if (x.signum() < 0) {
                    throw new ExpressionException(
                            "Argument to SQRT() function must not be negative");
                }
                BigInteger n = x.movePointRight(mc.getPrecision() << 1)
                        .toBigInteger();

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            buf[i] = bd.setScale(0, BigDecimal.ROUND_DOWN);
            
            bd = bd.subtract(buf[i]);
            if (i == 1) {
                if (bd.signum() != 0) {
                    throw new IllegalStateException(); // illegal carry-down
                } else {
                    carry = ZERO;
                }
            }

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            for (GenericValue payment : currentPayments) {
                if ("PMNT_VOID".equals(payment.getString("statusId")) || "PMNT_CANCELLED".equals(payment.getString("statusId"))) {
                    continue;
                }
                BigDecimal notApplied = PaymentWorker.getPaymentNotApplied(payment);
                if (notApplied.signum() > 0) {
                    Map<String, Object> appl = FastMap.newInstance();
                    appl.put("paymentId", payment.get("paymentId"));
                    appl.put("invoiceId", invoiceId);
                    appl.put("billingAccountId", billingAccountId);
                    appl.put("amountApplied", notApplied);

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        List<Map<String, String>> invoicesCreated = FastList.newInstance();
        Map<String, List<Map<String, Object>>> commissionParties = FastMap.newInstance();
        for (String salesInvoiceId : salesInvoiceIds) {
            List<String> salesRepPartyIds = UtilGenerics.checkList(context.get("partyIds"));
            BigDecimal amountTotal =  InvoiceWorker.getInvoiceTotal(delegator, salesInvoiceId);
            if (amountTotal.signum() == 0) {
                Debug.logWarning("Invoice [" + salesInvoiceId + "] has an amount total of [" + amountTotal + "], so no commission invoice will be created", module);
                return ServiceUtil.returnError(UtilProperties.getMessage(resource,
                        "AccountingInvoiceCommissionZeroInvoiceAmount", locale));
            }
            BigDecimal appliedFraction = amountTotal.divide(amountTotal, 12, ROUNDING);

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            // make sure the divisor is not 0 to avoid NaN problems; just leave the amount as 0 and skip it in essense
            if (divisor.signum() != 0) {
                // multiply first then divide to avoid rounding errors
                amount = baseAmount.multiply(multiplier).divide(divisor, decimals, rounding);
            }
            if (amount.signum() != 0) {
                Map<String, Object> createInvoiceItemContext = FastMap.newInstance();
                createInvoiceItemContext.put("invoiceId", invoiceId);
                createInvoiceItemContext.put("invoiceItemSeqId", invoiceItemSeqId);
                createInvoiceItemContext.put("invoiceItemTypeId", getInvoiceItemType(delegator, adj.getString("orderAdjustmentTypeId"), null, invoiceTypeId, "INVOICE_ADJ"));
                createInvoiceItemContext.put("description", adj.get("description"));

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            // make sure the divisor is not 0 to avoid NaN problems; just leave the amount as 0 and skip it in essense
            if (divisor.signum() != 0) {
                // multiply first then divide to avoid rounding errors
                amount = percent.multiply(divisor);
            }
            if (amount.signum() != 0) {
                Map<String, Object> createInvoiceItemContext = FastMap.newInstance();
                createInvoiceItemContext.put("invoiceId", invoiceId);
                createInvoiceItemContext.put("invoiceItemSeqId", invoiceItemSeqId);
                createInvoiceItemContext.put("invoiceItemTypeId", getInvoiceItemType(delegator, adj.getString("orderAdjustmentTypeId"), null, invoiceTypeId, "INVOICE_ADJ"));
                createInvoiceItemContext.put("description", adj.get("description"));

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                amountAppliedMax = toPaymentApplyAvailable;
            }


            if (paymentApplicationId == null) {
                // only check for new application records, update on existing records is checked in the paymentApplication section
                if (toPaymentApplyAvailable.signum() == 0) {
                    errorMessageList.add(UtilProperties.getMessage(resource, 
                            "AccountingPaymentAlreadyApplied", UtilMisc.toMap("paymentId", toPaymentId), locale));
                } else {
                    // check here for too much application if a new record is
                    // added (paymentApplicationId == null)

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