/* 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;

import com.db4o.ext.*;
import com.db4o.internal.freespace.*;

/**
 * @exclude
 */
public class SystemInfoFileImpl implements SystemInfo{
    
    private LocalObjectContainer _file;

    public SystemInfoFileImpl(LocalObjectContainer file){
        _file = file;
    }

    public int freespaceEntryCount() {
        if(! hasFreespaceManager()){
            return 0;
        }
        return freespaceManager().slotCount();
    }

    private boolean hasFreespaceManager() {
        return freespaceManager() != null;
    }
 

    private FreespaceManager freespaceManager() {
        return _file.freespaceManager();
    }

    public long freespaceSize() {
        if(! hasFreespaceManager()){
            return 0;
        }
        long blockSize = _file.blockSize();
        long blockedSize = freespaceManager().totalFreespace();
        return blockSize * blockedSize;
    }

    public long totalSize() {
        return _file.fileLength();
    }


}
