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_INTERESTACCT")
  public class InterestAccount extends Account {
      private double rate;
      
      public InterestAccount() {}
      public InterestAccount(long id) { super(id); }
  
      public void withdraw(double amount) throws AccountException {
          super.setBalance(super.getBalance() - amount);
      }
      
      public void processInterest() {
          super.setBalance(super.getBalance() * (1 + rate)); 
      }
  
      public double getRate() {
          return rate;
      }
  
      public void setRate(double rate) {
          this.rate = rate;
      }
  
      public String toString() {
          StringBuilder text = new StringBuilder(super.toString());
          text.append(", rate=" + rate);
          return text.toString();
      }
  }