/*
 * Created on Sep 27, 2004
 *
 * TODO To change the template for this generated file go to
 * Window - Preferences - Java - Code Style - Code Templates
 */

/**
 * @author syucel
 *
 * This example is adapted from Deitels' book "Java How To Program".
 */
import java.text.DecimalFormat;
public class AbstractEmployee {

    public static void main(String[] args) {
        Employee ref;  // superclass reference
        Boss b;
        PieceWorker p;
        HourlyWorker h;
        
        b = new Boss( "John", "Smith", 800.00 );
        p = new PieceWorker( "Bob", "Lewis", 2.5, 200 );
        h = new HourlyWorker( "Karen", "Price", 13.75, 40 );
        
        DecimalFormat precision2 = new DecimalFormat( "#.00" );

        ref = b;  // superclass reference to subclass object
        System.out.println( ref + " earned $" +
                      precision2.format( ref.earnings() ));
        System.out.println( b + " earned $" +
                      precision2.format( b.earnings() ));
     
        ref = p;  // superclass reference to subclass object
        System.out.println( ref + " earned $" + 
                      precision2.format( ref.earnings() ));
     
        ref = h;  // superclass reference to subclass object
        System.out.println( ref + " earned $" + 
                      precision2.format( ref.earnings() ));
    }
}

abstract class Employee {
    // Constructor
    public Employee( String first, String last )
    {
       firstName = first;
       lastName = last;
    }
    
    // Return the first name
    public String getFirstName() { return firstName; }

    // Return the last name
    public String getLastName() { return lastName; }

    public String toString()
       { return firstName + ' ' + lastName; }

    // Abstract method that must be implemented for each 
    // derived class of Employee from which objects 
    // are instantiated.
    abstract double earnings(); 
    
    private String firstName;
    private String lastName;
 }

final class Boss extends Employee {

    // Constructor for class Boss
    public Boss( String first, String last, double s)
    {
       super( first, last );  // call superclass constructor
       setWeeklySalary( s );
    }
    
    // Set the Boss's salary
    public void setWeeklySalary( double s )
       { weeklySalary = ( s > 0 ? s : 0 ); }
    
    // Get the Boss's pay
    public double earnings() { return weeklySalary; }
    
    // Print the Boss's name 
    public String toString() 
    {
       return "Boss: " + super.toString();
    }
    private double weeklySalary; 
 }

final class PieceWorker extends Employee {

    // Constructor for class PieceWorker
    public PieceWorker( String first, String last,
                        double w, int q )
    {
       super( first, last );  // call superclass constructor
       setWage( w );
       setQuantity( q );
    }
    
    // Set the wage
    public void setWage( double w ) 
       { wagePerPiece = ( w > 0 ? w : 0 ); }
    
    // Set the number of items output
    public void setQuantity( int q ) 
       { quantity = ( q > 0 ? q : 0 ); }
    
    // Determine the PieceWorker's earnings
    public double earnings()
       { return quantity * wagePerPiece; }
    
    public String toString()
    {
       return "Piece worker: " + super.toString();
    }  
    
    private double wagePerPiece; // wage per piece output
    private int quantity;        // output for week
 }
    
final class HourlyWorker extends Employee {
 
    // Constructor for class HourlyWorker
    public HourlyWorker( String first, String last, 
                         double w, double h )
    {
       super( first, last );   // call superclass constructor
       setWage( w );
       setHours( h );
    }
    
    // Set the wage
    public void setWage( double w )
       { wage = ( w > 0 ? w : 0 ); }
    
    // Set the hours worked
    public void setHours( double h )
       { hours = ( h >= 0 && h < 168 ? h : 0 ); }
    
    // Get the HourlyWorker's pay
    public double earnings() { return wage * hours; }
    
    public String toString() 
    {
       return "Hourly worker: " + super.toString();
    }

    private double wage;   // wage per hour
    private double hours;  // hours worked for week
 }