Examples of org.apache.commons.math3.exception.MathArithmeticException

Package org.apache.commons.math3.exception

Examples of org.apache.commons.math3.exception.MathArithmeticException

org.apache.commons.math3.exception.MathArithmeticException
Base class for arithmetic exceptions. It is used for all the exceptions that have the semantics of the standard {@link ArithmeticException}, but must also provide a localized message. @since 3.0

     * @return a new fraction instance, with the numerator and denominator reduced
     * @throws MathArithmeticException if the denominator is {@code zero}
     */
    public static Fraction getReducedFraction(int numerator, int denominator) {
        if (denominator == 0) {
            throw new MathArithmeticException(LocalizedFormats.ZERO_DENOMINATOR_IN_FRACTION,
                                              numerator, denominator);
        }
        if (numerator==0) {
            return ZERO; // normalize zero.
        }
        // allow 2^k/-2^31 as a valid fraction (where k>0)
        if (denominator==Integer.MIN_VALUE && (numerator&1)==0) {
            numerator/=2; denominator/=2;
        }
        if (denominator < 0) {
            if (numerator==Integer.MIN_VALUE ||
                    denominator==Integer.MIN_VALUE) {
                throw new MathArithmeticException(LocalizedFormats.OVERFLOW_IN_FRACTION,
                                                  numerator, denominator);
            }
            numerator = -numerator;
            denominator = -denominator;
        }

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        final double norm = getNorm();
        final double vNorm = v.getNorm();


        if (norm == 0 ||
            vNorm == 0) {
            throw new MathArithmeticException(LocalizedFormats.ZERO_NORM);
        }
        return dotProduct(v) / (norm * vNorm);
    }

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     */
    public RealVector projection(final RealVector v)
        throws DimensionMismatchException, MathArithmeticException {
        final double norm2 = v.dotProduct(v);
        if (norm2 == 0.0) {
            throw new MathArithmeticException(LocalizedFormats.ZERO_NORM);
        }
        return v.mapMultiply(dotProduct(v) / v.dotProduct(v));
    }

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     * @throws MathArithmeticException if the norm is zero.
     */
    public RealVector unitVector() throws MathArithmeticException {
        final double norm = getNorm();
        if (norm == 0) {
            throw new MathArithmeticException(LocalizedFormats.ZERO_NORM);
        }
        return mapDivide(norm);
    }

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     * @throws MathArithmeticException if the norm is zero.
     */
    public void unitize() throws MathArithmeticException {
        final double norm = getNorm();
        if (norm == 0) {
            throw new MathArithmeticException(LocalizedFormats.ZERO_NORM);
        }
        mapDivideToSelf(getNorm());
    }

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    /** {@inheritDoc} */
    @Override
    public void unitize() throws MathArithmeticException {
        double norm = getNorm();
        if (isDefaultValue(norm)) {
            throw new MathArithmeticException(LocalizedFormats.ZERO_NORM);
        }
        Iterator iter = entries.iterator();
        while (iter.hasNext()) {
            iter.advance();
            entries.put(iter.key(), iter.value() / norm);

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    public BigReal divide(BigReal a) throws MathArithmeticException {
        try {
            return new BigReal(d.divide(a.d, scale, roundingMode));
        } catch (ArithmeticException e) {
            // Division by zero has occurred
            throw new MathArithmeticException(LocalizedFormats.ZERO_NOT_ALLOWED);
        }
    }

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    public BigReal reciprocal() throws MathArithmeticException {
        try {
            return new BigReal(BigDecimal.ONE.divide(d, scale, roundingMode));
        } catch (ArithmeticException e) {
            // Division by zero has occurred
            throw new MathArithmeticException(LocalizedFormats.ZERO_NOT_ALLOWED);
        }
    }

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     */
    public static int addAndCheck(int x, int y)
            throws MathArithmeticException {
        long s = (long)x + (long)y;
        if (s < Integer.MIN_VALUE || s > Integer.MAX_VALUE) {
            throw new MathArithmeticException(LocalizedFormats.OVERFLOW_IN_ADDITION, x, y);
        }
        return (int)s;
    }

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        int b = q;
        if (a == 0 ||
            b == 0) {
            if (a == Integer.MIN_VALUE ||
                b == Integer.MIN_VALUE) {
                throw new MathArithmeticException(LocalizedFormats.GCD_OVERFLOW_32_BITS,
                                                  p, q);
            }
            return FastMath.abs(a + b);
        }


        long al = a;
        long bl = b;
        boolean useLong = false;
        if (a < 0) {
            if(Integer.MIN_VALUE == a) {
                useLong = true;
            } else {
                a = -a;
            }
            al = -al;
        }
        if (b < 0) {
            if (Integer.MIN_VALUE == b) {
                useLong = true;
            } else {
                b = -b;
            }
            bl = -bl;
        }
        if (useLong) {
            if(al == bl) {
                throw new MathArithmeticException(LocalizedFormats.GCD_OVERFLOW_32_BITS,
                                                  p, q);
            }
            long blbu = bl;
            bl = al;
            al = blbu % al;
            if (al == 0) {
                if (bl > Integer.MAX_VALUE) {
                    throw new MathArithmeticException(LocalizedFormats.GCD_OVERFLOW_32_BITS,
                                                      p, q);
                }
                return (int) bl;
            }
            blbu = bl;

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