package ejava.examples.orm.inheritance.annotated;
   
   import javax.persistence.*;
   
   /**
    * This class provides an example of an entity sub-class using separate
    * classes per-concrete derived class. This means that the base class
    * properties will get merged into this table (similar to non-entity 
    * inheritance).
   */
  @Entity
  @Table(name="ORMINH_CHECKING")
  public class CheckingAccount extends Account {
      private double fee;
      
      public CheckingAccount() {}
      public CheckingAccount(long id) { super(id); }
  
      public void withdraw(double amount) throws AccountException {
          super.setBalance(super.getBalance() - fee);
      }
  
      public double getFee() { return fee; }
      public void setFee(double fee) {
          this.fee = fee;
      }
      
      public String toString() {
          StringBuilder text = new StringBuilder(super.toString());
          text.append(", fee=" + fee);
          return text.toString();
      }
  }