Inverse.java

package jscl.math.function;

import jscl.math.Generic;
import jscl.math.JsclInteger;
import jscl.math.NotDivisibleException;
import jscl.math.Variable;

import javax.annotation.Nonnull;

public class Inverse extends Fraction {

    // inverse function: 1/g
    public Inverse(Generic generic) {
        super(JsclInteger.valueOf(1), generic);
    }

    public Generic selfExpand() {
        try {
            Generic parameter = parameter();
            /*try {
                   if (JsclInteger.ZERO.equals(parameter.integerValue())) {
                       throw new ArithmeticException("Division by 0!");
                   }
               } catch (NotIntegerException e) {
                   // ok
               }*/

            return JsclInteger.ONE.divide(parameter);
        } catch (NotDivisibleException e) {
        }

        return expressionValue();
    }

    public Generic parameter() {
        return parameters[1];
    }

    @Nonnull
    public Variable newInstance() {
        return new Inverse(null);
    }
}