package myorg.relex.collection;
   
   
   import javax.persistence.*;
   
   /**
    * This class is provides an example of an entity that implements hashCode/equals 
    * using its database assigned primary key if it exists and defaults to the 
    * java.lang.Object definition if not yet assigned.  Note that this technique causes
   * a change in hashCode/equals after the persist() takes place -- invalidating anything
   * previously cached for the identity.
   */
  @Entity
  @Table(name="RELATIONEX_SHIP")
  public class ShipBySwitch extends Ship {
  	@Override
  	public int peekHashCode() {
  		return id==0 ? super.objectHashCode() : id;
  	}
  
  	@Override
  	public boolean equals(Object obj) {
  		try {
              if (this == obj) { return logEquals(obj, true); }
  			boolean equals = (id==0) ? super.equals(obj) :
  				id==((ShipBySwitch)obj).id;
  			return logEquals(obj, equals);
  		} catch (Exception ex) {
  			return logEquals(obj, false);
  		}
  	}
  }