/*
 * Class definition which can be used to
 * create instances of RomanNumeral objects.
 *
 * CS112
 *
 * Christine Papadakis-Kanaris
 */

public class RomanNumeral {

    // declare the fields (data members)
    // of the class
    private int numericalValue;
    private String stringValue;

    // Constructor
    public RomanNumeral(String stringValue) {
        this.stringValue = stringValue;

	// Note:
	//
        // Since we had already written a method to
        // convert a roman numeral string into
        // its decimal equivalent in our static
        // class, we can use it here and
	// do not need to duplicate the code
        // in this class.
        //
        this.numericalValue = RomanNumeralStatic.convert(stringValue);
    }

    // 
    // Accessor method for the numerical value
    //
    // Note that we don't really need one for the string value
    // since we can obtain it using the toString method.
    //
    public int getNumericalValue() {
        return this.numericalValue;
    }

    //
    // Other methods of the class
    //
    public String toString() {
        return this.stringValue;
    }

    public boolean equals(RomanNumeral other) {
        return (this.numericalValue == other.numericalValue);
    }

    public int add(RomanNumeral other) {
        return this.numericalValue + other.numericalValue;
    }

    /* 
     * Local main method to test
     * the methods of our class.
     */
    public static void main(String[] args) {
        RomanNumeral x = new RomanNumeral("X");
        RomanNumeral y = new RomanNumeral("IX");
        System.out.println(x + " + " + y + " = " + x.add(y));

        System.out.print( "Testing equality, the objects are " );
	if ( !x.equals(y) )
	    System.out.print( "not " );
	System.out.println( "equal!" );
    }

} // end of class definition