// Fig. 10.9: PayrollSystemTest.java
// Employee hierarchy test program.

public class PayrollSystemTest 
{
   public static void main( String args[] ) 
   {
      // create subclass objects
      SalariedEmployee salariedEmployee = 
         new SalariedEmployee( "John", "Smith", "111-11-1111", 800.00 );
      HourlyEmployee hourlyEmployee = 
         new HourlyEmployee( "Karen", "Price", "222-22-2222", 16.75, 40 );
      CommissionEmployee commissionEmployee = 
         new CommissionEmployee( 
         "Sue", "Jones", "333-33-3333", 10000, .06 );
      BasePlusCommissionEmployee basePlusCommissionEmployee = 
         new BasePlusCommissionEmployee( 
         "Bob", "Lewis", "444-44-4444", 5000, .04, 300 );

      System.out.println( "Employees processed individually:\n" );
      
      System.out.printf( "%s\n%s: $%,.2f\n\n", 
         salariedEmployee, "earned", salariedEmployee.earnings() );
      System.out.printf( "%s\n%s: $%,.2f\n\n",
         hourlyEmployee, "earned", hourlyEmployee.earnings() );
      System.out.printf( "%s\n%s: $%,.2f\n\n",
         commissionEmployee, "earned", commissionEmployee.earnings() );
      System.out.printf( "%s\n%s: $%,.2f\n\n", 
         basePlusCommissionEmployee, 
         "earned", basePlusCommissionEmployee.earnings() );

      // create four-element Employee array
      Employee employees[] = new Employee[ 4 ]; 

      // initialize array with Employees
      employees[ 0 ] = salariedEmployee;
      employees[ 1 ] = hourlyEmployee;
      employees[ 2 ] = commissionEmployee; 
      employees[ 3 ] = basePlusCommissionEmployee;

      System.out.println( "Employees processed polymorphically:\n" );
      
      // generically process each element in array employees
      for ( Employee currentEmployee : employees ) 
      {
         System.out.println( currentEmployee ); // invokes toString

         // determine whether element is a BasePlusCommissionEmployee
         if ( currentEmployee instanceof BasePlusCommissionEmployee ) 
         {
            // downcast Employee reference to 
            // BasePlusCommissionEmployee reference
            BasePlusCommissionEmployee employee = 
               ( BasePlusCommissionEmployee ) currentEmployee;

            double oldBaseSalary = employee.getBaseSalary();
            employee.setBaseSalary( 1.10 * oldBaseSalary );
            System.out.printf( 
               "new base salary with 10%% increase is: $%,.2f\n",
               employee.getBaseSalary() );
         } // end if

         System.out.printf( 
            "earned $%,.2f\n\n", currentEmployee.earnings() );
      } // end for

      // get type name of each object in employees array
      for ( int j = 0; j < employees.length; j++ )
         System.out.printf( "Employee %d is a %s\n", j, 
            employees[ j ].getClass().getName() ); 
   } // end main
} // end class PayrollSystemTest

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