/* Copyright (C) 2004 - 2008  db4objects Inc.  http://www.db4o.com

This file is part of the db4o open source object database.

db4o is free software; you can redistribute it and/or modify it under
the terms of version 2 of the GNU General Public License as published
by the Free Software Foundation and as clarified by db4objects' GPL 
interpretation policy, available at
http://www.db4o.com/about/company/legalpolicies/gplinterpretation/
Alternatively you can write to db4objects, Inc., 1900 S Norfolk Street,
Suite 350, San Mateo, CA 94403, USA.

db4o 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. */
package com.db4o.internal.convert;

import com.db4o.internal.*;

/**
 * @exclude
 */
public abstract class ConversionStage {
	
	public final static class ClassCollectionAvailableStage extends ConversionStage {
		
		public ClassCollectionAvailableStage(LocalObjectContainer file) {
			super(file);
		}

		public void accept(Conversion conversion) {
			conversion.convert(this);
		}
	}

	public final static class SystemUpStage extends ConversionStage {
		public SystemUpStage(LocalObjectContainer file) {
			super(file);
		}
		public void accept(Conversion conversion) {
			conversion.convert(this);
		}
	}

	private LocalObjectContainer _file;
	
	protected ConversionStage(LocalObjectContainer file) {
		_file = file;
	}

	public LocalObjectContainer file() {
		return _file;
	}
	
    public SystemData systemData(){
        return _file.systemData();
    }
	
	public abstract void accept(Conversion conversion);
}
