// Fig. 10.16: BasePlusCommissionEmployee.java
// BasePlusCommissionEmployee class extends CommissionEmployee.

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

  // constructor
  public BasePlusCommissionEmployee( String first, String last,
                                     String socialSecurityNumber,
                                     double grossSalesAmount, double rate,
                                     double baseSalaryAmount )
  {
    super( first, last, socialSecurityNumber, grossSalesAmount, rate );
    setBaseSalary( baseSalaryAmount );
  }

  // set base-salaried commission employee's base salary
  public void setBaseSalary( double salary )
  {
    baseSalary = salary < 0.0 ? 0.0 : salary;
  }

  // return base-salaried commission employee's base salary
  public double getBaseSalary()
  {
    return baseSalary;
  }

  // calculate base-salaried commission employee's earnings;
  // override method earnings in CommissionEmployee
  public double earnings()
  {
    return getBaseSalary() + super.earnings();
  }

  // return String representation of BasePlusCommissionEmployee
  public String toString()
  {
    return "\nbase-salaried commission employee: " +
        super.getFirstName() + " " + super.getLastName() +
        "\nsocial security number: " + super.getSocialSecurityNumber();
  }

} // end class BasePlusCommissionEmployee