package poly.op;

import poly.*;
import poly.factory.*;

/**
* Adds host polynomial to a constant Double and returns the resulting sum
* polynomial.  Turn this into an anonymous inner class when adding a polynomial
* to constant polynomial, IConstPoly, host.
* @author Dung X. Nguyen
* @since Copyright 2002 - DXN - All rights reserved
*/
public class AddDouble implements IPolyOp {

    IPolyFact _fact;

    public AddDouble(IPolyFact f) {
        _fact = f;
    }

    /**
     * @param poly a constant polynomial
     * @param inp a Double
     * @return IConstPoly representing the sum of poly and inp.
     */
    public Object forConst (IConstPoly poly, Object inp) {
        return _fact.makeConstPoly(poly.getLeadCoef() +
                                   ((Double)inp).doubleValue ());
    }

    /**
     * @param poly a non-constant polynomial
     * @param inp a Double
     * @return INCPoly representing the sum of poly and inp.
     */
    public Object forNonConst(INCPoly poly, Object inp) {
        // recur on the lower polynomial of poly, make an appropriate sum
        // and return it.
        return null; // TO DO
    }
}