public PackagedSessionImpl() 
{
   
      this.lastModificationTimeInVM = System.currentTimeMillis ();
}

 public PackagedSessionImpl(Serializable key,
    byte[] state,
    String owner) 
{
      this.key = key;
      this.setState (state);
      this.owner = owner;
      this.lastModificationTimeInVM = System.currentTimeMillis ();
}

 public Serializable getKey() 
{
 return this.key;
}

 public String getOwner() 
{
 return this.owner;
}

 public byte[] getState() 
{
      return this.state;
}

 public long getVersion() 
{
 return this.versionId;
}

 public boolean isStateIdentical(byte[] state) 
{
      return java.util.Arrays.equals (state, this.state);
}

 public  void setKey(Serializable key) 
{
 this.key = key;
}

 public  void setOwner(String owner) 
{
 this.owner = owner;
}

 public boolean setState(byte[] state) 
{
      this.lastModificationTimeInVM = System.currentTimeMillis ();
      if (isStateIdentical (state))
         return true;
      else
      {
         this.state = state;
         this.versionId++;
         return false;
      }
}

 public long unmodifiedExistenceInVM() 
{
      return this.lastModificationTimeInVM;
}

 public  void update(PackagedSession clone) 
{
      this.state = (byte[])clone.getState().clone();
      this.versionId = clone.getVersion ();
      this.owner = clone.getOwner ();    
      this.lastModificationTimeInVM = System.currentTimeMillis();
}