/* This file is part of the db4o object database http://www.db4o.com

Copyright (C) 2004 - 2011  Versant Corporation http://www.versant.com

db4o is free software; you can redistribute it and/or modify it under
the terms of version 3 of the GNU General Public License as published
by the Free Software Foundation.

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, see http://www.gnu.org/licenses/. */
package com.db4o.internal;

import com.db4o.foundation.*;
import com.db4o.internal.marshall.*;

/**
 * @exclude
 */
public class NullFieldMetadata extends FieldMetadata {
    
    public NullFieldMetadata(){
        super(null);
    }
    
    /**
     * @param obj
     */
    public PreparedComparison prepareComparison(Object obj) {
    	return Null.INSTANCE;
    }
	
	public final Object read(ObjectIdContext context) {
	    return null;
	}
	
}
