// Fig. 10.8: BasePlusCommissionEmployee.java
// BasePlusCommissionEmployee class extends CommissionEmployee.

public class BasePlusCommissionEmployee extends CommissionEmployee {
   private double baseSalary; // base salary per week

   // constructor
   public BasePlusCommissionEmployee(String firstName, String lastName, 
      String socialSecurityNumber, double grossSales,
      double commissionRate, double baseSalary) {
      super(firstName, lastName, socialSecurityNumber, 
         grossSales, commissionRate);

      if (baseSalary < 0.0) { // validate baseSalary                  
         throw new IllegalArgumentException("Base salary must be >= 0.0");
      }      
             
      this.baseSalary = baseSalary;                
   }

   // set base salary
   public void setBaseSalary(double baseSalary) {
      if (baseSalary < 0.0) { // validate baseSalary                  
         throw new IllegalArgumentException("Base salary must be >= 0.0");
      }
            
      this.baseSalary = baseSalary;                
   } 

   // return base salary
   public double getBaseSalary() {return baseSalary;}

   // calculate earnings; override method earnings in CommissionEmployee
   @Override                                                            
   public double earnings() {return getBaseSalary() + super.earnings();}

   // return String representation of BasePlusCommissionEmployee object
   @Override                                                           
   public String toString() {                                          
      return String.format("%s %s; %s: $%,.2f",                        
         "base-salaried", super.toString(),                            
         "base salary", getBaseSalary());                              
   }                                                                   
} 



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