/*
 * Created on 07-May-2004
 * Created by Paul Gardner
 * Copyright (C) 2004, 2005, 2006 Aelitis, All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * This program 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 General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 * 
 * AELITIS, SAS au capital de 46,603.30 euros
 * 8 Allee Lenotre, La Grille Royale, 78600 Le Mesnil le Roi, France.
 *
 */

package org.gudy.azureus2.plugins.update; 

/**
 * @author parg
 *
 */

import java.io.InputStream;

import org.gudy.azureus2.plugins.utils.resourcedownloader.*;

public interface 
Update 
{
	public static final int	RESTART_REQUIRED_NO			= 1;
	public static final int	RESTART_REQUIRED_YES		= 2;
	public static final int	RESTART_REQUIRED_MAYBE		= 3;
	
	public String
	getName();

	public String[]
	getDescription();
	
	public String
	getRelativeURLBase();
	
	public void
	setRelativeURLBase(
		String	base );

	/**
	 * 
	 * @param url URL to load instead of showing the description text)
	 *
	 * @since 3.0.1.7
	 */
	public void
	setDescriptionURL(
		String url);
	
	/**
	 * @return null if no description url
	 *
	 * @since 3.0.1.7
	 */
	public String 
	getDesciptionURL();

	public String
	getNewVersion();
	
	public ResourceDownloader[]
	getDownloaders();
	
	public boolean
	isMandatory();
	
	public void
	setRestartRequired(
		int	restart_required );
	
	public int
	getRestartRequired();
	
	public void
	setUserObject(
		Object		obj );
	
	public Object
	getUserObject();
	
		/**
		 * mark the update as complete and inform any listeners
		 */
	
	public void
	complete();
	
		/**
		 * cancel this update
		 */
	
	public void
	cancel();
	
	public UpdateCheckInstance
	getCheckInstance();
	
	public Object
	getDecision(
		int			decision_type,	// see UpdateManagerDecisionListener
		String		decision_name,
		String		decision_description,
		Object		decision_data );
	
	public InputStream
	verifyData(
		InputStream		is,
		boolean			force )
	
		throws UpdateException;
	
	public void
	addListener(
		UpdateListener	l );
	
	public void
	removeListener(
		UpdateListener	l );
}