/**
* ComplexAlgebraicNumber signum.
*
* @see edu.jas.structure.RingElem#signum()
* @return signum(this).
*/
public int signum() {
try {
Rectangle<C> v = ring.engine.invariantRectangle(ring.root, ring.algebraic.modul, number.val);
ring.setRoot(v);
Complex<C> c = v.getCenter();
return c.signum();
} catch (InvalidBoundaryException e) { // should not happen
e.printStackTrace();
throw new RuntimeException(e);
}
}
/**
* ComplexAlgebraicNumber magnitude.
*
* @return |this| as complex rational number.
*/
public Complex<BigRational> magnitude() {
try {
Rectangle<C> v =
ring.engine.invariantMagnitudeRectangle(
ring.root, ring.algebraic.modul, number.val, ring.getEps());
ring.setRoot(v);
// System.out.println("new v = " + v);
Complex<C> ev =
ring.engine.complexRectangleMagnitude(
v, ring.algebraic.modul, number.val); // , ring.eps);
// C re = ev.getRe();
// if ( (Object) re instanceof Rational) { // true by type parameter
BigRational er = ev.getRe().getRational();
BigRational ei = ev.getIm().getRational();
ComplexRing<BigRational> cr = new ComplexRing<BigRational>(er.factory());
return new Complex<BigRational>(cr, er, ei);
// } else {
// throw new RuntimeException("Rational expected, but was " + ev.getClass());
// }
} catch (InvalidBoundaryException e) { // should not happen
e.printStackTrace();
throw new RuntimeException(e);
}
}
/**
* Comparison with any other object.
*
* @see java.lang.Object#equals(java.lang.Object)
*/
@Override
@SuppressWarnings("unchecked")
public boolean equals(Object b) {
if (!(b instanceof ComplexAlgebraicNumber)) {
return false;
}
ComplexAlgebraicNumber<C> a = null;
try {
a = (ComplexAlgebraicNumber<C>) b;
} catch (ClassCastException e) {
}
if (a == null) {
return false;
}
if (!ring.equals(a.ring)) {
return false;
}
return number.equals(a.number);
}
/**
* Hash code for this ComplexAlgebraicNumber.
*
* @see java.lang.Object#hashCode()
*/
@Override
public int hashCode() {
return 37 * number.val.hashCode() + ring.hashCode();
}
