package org.lsst.ccs.config;
   
   import org.hibernate.annotations.Immutable;
   
   import javax.persistence.Entity;
   import javax.persistence.Id;
   
   /**
    * Past change in a value that was modified during an engineering session.
   * @author bamade
   */
  // Date: 21/05/12
  
      @Entity
      @Immutable
  class PastValueEvent extends ValueEvent {
      private static final long serialVersionUID = -2214790804800742084L;
      @Id
      private long id ;
  
      PastValueEvent() {}
  
      public PastValueEvent(AValueEvent former) {
          super(former.getTime(), former.getValue());
          this.id = former.getId() ;
      }
      @Override
      public long getId() {
          return id  ;
      }
  
      void setId(long id) {
          this.id = id ;
      }
  }