/*****************************************************************
JADE - Java Agent DEvelopment Framework is a framework to develop 
multi-agent systems in compliance with the FIPA specifications.
Copyright (C) 2000 CSELT S.p.A. 

The updating of this file to JADE 2.0 has been partially supported by the IST-1999-10211 LEAP Project

GNU Lesser General Public License

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation, 
version 2.1 of the License. 

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA  02111-1307, USA.
*****************************************************************/

package jade.domain.KBManagement;

/**
 * @author Elisabetta Cortese - TILab
 *
 */
import jade.domain.FIPAAgentManagement.DFAgentDescription;
import jade.domain.KBManagement.*;

import java.util.Date;


public class DFLeaseManager implements LeaseManager{
	
	public Date getLeaseTime(Object item){
		if(item instanceof DFAgentDescription){
			return ((DFAgentDescription) item).getLeaseTime();
		}
		else{
			return DEFAULT_LEASE_TIME;
		}
	}
	
	public void setLeaseTime(Object item, Date lease){
		
		if(item instanceof DFAgentDescription){
			if(isValid(lease)){
				((DFAgentDescription) item).setLeaseTime(lease);
			}
			else{
				((DFAgentDescription) item).setLeaseTime(DEFAULT_LEASE_TIME);
			}
		}
	}

	public Object grantLeaseTime(Object item){
		// Always grant the requested lease time
		return item;
	}
	
	public boolean isValid(Date lease){
		
		if(lease.getTime() >= System.currentTimeMillis() || lease.getTime() == -1)
			return true;
		return false;
	}

}

Implement the lease manager for DF