Example usage for java.math MathContext getRoundingMode

Introduction

In this page you can find the example usage for java.math MathContext getRoundingMode.

Prototype

public RoundingMode getRoundingMode() 

Source Link

Document

Returns the roundingMode setting.

Usage

From source file:com.qcadoo.model.internal.units.UnitConversionImpl.java

private UnitConversionImpl(final String unitFrom, final String unitTo, final BigDecimal ratio,
        final MathContext mathContext) {
    Preconditions.checkNotNull(unitFrom);
    Preconditions.checkNotNull(ratio);//from w  w w.j  av  a2  s .  c o  m
    Preconditions.checkNotNull(mathContext);

    this.unitFrom = unitFrom;
    this.unitTo = unitTo;
    this.ratio = ratio.setScale(mathContext.getPrecision(), mathContext.getRoundingMode());
    this.mathContext = mathContext;
}

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From source file:dk.clanie.money.Money.java

/**
 * Divide evenly into parts./*from w w w  .ja v a2s .  c om*/
 * 
 * Divides an amount into parts of approximately the same size while
 * ensuring that the sum of all the parts equals the whole.
 * <p>
 * Parts of unequal size will be distributed evenly in the returned array.
 * <p>
 * For example, if asked to divede 20 into 6 parts the result will be {3.33,
 * 3.34, 3.33, 3.33, 3.34, 3.33}
 * 
 * @param parts -
 *            number of parts
 * @return Money[] with the parts
 */
public Money[] divideEvenlyIntoParts(int parts) {
    Money[] res = new Money[parts];
    final BigDecimal bdParts = new BigDecimal(parts);
    final MathContext mc = MathContext.DECIMAL128;
    BigDecimal sumOfPreviousParts = BigDecimal.ZERO;
    for (int i = 0; i < parts; i++) {
        Money part = new Money();
        BigDecimal sumOfParts = amount.multiply(new BigDecimal(i + 1));
        sumOfParts = sumOfParts.divide(bdParts, mc);
        sumOfParts = sumOfParts.setScale(amount.scale(), mc.getRoundingMode());
        part.amount = sumOfParts.subtract(sumOfPreviousParts);
        sumOfPreviousParts = sumOfParts;
        part.currency = currency;
        res[i] = part;
    }
    return res;
}

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From source file:com.premiumminds.billy.core.services.builders.impl.GenericInvoiceBuilderImpl.java

protected void validateValues() throws ValidationException {

    GenericInvoiceEntity i = this.getTypeInstance();
    i.setCurrency(Currency.getInstance("EUR")); // FIXME: Hardcoded currency.
                                                // Blocks usage of any other
                                                // currency

    MathContext mc = BillyMathContext.get();

    BigDecimal amountWithTax = BigDecimal.ZERO;
    BigDecimal taxAmount = BigDecimal.ZERO;
    BigDecimal amountWithoutTax = BigDecimal.ZERO;

    for (GenericInvoiceEntry e : this.getTypeInstance().getEntries()) {

        amountWithTax = amountWithTax.add(e.getUnitAmountWithTax().multiply(e.getQuantity(), mc), mc);
        taxAmount = taxAmount.add(e.getUnitTaxAmount().multiply(e.getQuantity(), mc), mc);
        amountWithoutTax = amountWithoutTax.add(e.getUnitAmountWithoutTax().multiply(e.getQuantity(), mc), mc);
        if (e.getCurrency() == null) {
            GenericInvoiceEntryEntity entry = (GenericInvoiceEntryEntity) e;
            entry.setCurrency(i.getCurrency());
            e = entry;/*  www .ja  va2  s .  co m*/
        } else {
            Validate.isTrue(i.getCurrency().getCurrencyCode().equals(e.getCurrency().getCurrencyCode()));
        }
    }

    i.setAmountWithTax(amountWithTax);
    i.setTaxAmount(taxAmount);
    i.setAmountWithoutTax(amountWithoutTax);

    Validate.isTrue(
            i.getAmountWithTax().subtract(i.getTaxAmount(), mc).setScale(7, mc.getRoundingMode())
                    .compareTo(i.getAmountWithoutTax().setScale(7, mc.getRoundingMode())) == 0,
            "The invoice values are invalid", // TODO message
            i.getAmountWithTax(), i.getAmountWithoutTax(), i.getTaxAmount());

    Validate.isTrue(
            i.getAmountWithTax().compareTo(BigDecimal.ZERO) > 0
                    && i.getAmountWithoutTax().compareTo(BigDecimal.ZERO) >= 0
                    && i.getTaxAmount().compareTo(BigDecimal.ZERO) >= 0,
            "The invoice values are lower than zero", // TODO
            // message
            i.getAmountWithTax(), i.getAmountWithoutTax(), i.getTaxAmount());
}

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