// class that provides a Poly with Alphas as coeffecients
import java.awt.*;

public class AlphaPoly extends Poly
{
    
  AlphaPoly(int degree)
  {  super(degree, new Alpha(Integer.MIN_VALUE)); }

  AlphaPoly(int degree, Alpha[] coeffs)
  {  super(degree, coeffs, new Alpha(Integer.MIN_VALUE)); }
  
    // creates a zero-polynomial w/ one nonzero coeff: onecoeff at position
  AlphaPoly(Alpha onecoeff, int position)
  {  
  super(position, new Alpha(Integer.MIN_VALUE)); 
  this.set(onecoeff, position);
  }

  // -----------------------
public void printPoly(TextArea text)
  {
    boolean plusflag = false;

    for (int j=0; j <= this.degree; j++)
      {
      if ((j==0) && (!(((Alpha)coeffs[j]).isZero())))
	{
	  plusflag = true;
	  ((Alpha)(coeffs[j])).print(text);
	}
      else if (!(((Alpha)coeffs[j]).isZero()))
	{
	  if (plusflag)  text.append(" + "); 
	  ((Alpha)(coeffs[j])).print(text);
	  text.append("x^" + j);
	  plusflag=true;
	}
      }
    if (!plusflag)    // no polynomial printed
      text.append("Zero Polynomial");
    text.append("\n");
  }

  // -----------------------
public String getString()
  {
    char [] ch = new char[degree+1];
    String nums = "";

    for (int j=0; j <= degree; j++)
      {
      ch[j] = Character.forDigit(((Alpha)coeffs[j]).getPower(), 16);
      nums += (new Character(ch[j])).toString();
      }

    return nums;
  }
  
  //---------------------------
  public Poly shiftRight(int shval)
   {
     AlphaPoly newp = new AlphaPoly(degree+shval);
     for (int i=degree; i >= 0; i--)
       newp.set(coeffs[i], i+shval);
     for (int j=shval-1; j >= 0; j--)
       newp.set(new Alpha(Integer.MIN_VALUE), j);     
       
     return newp;
  }

}