/*
NeoDatis ODB : Native Object Database (odb.info@neodatis.org)
Copyright (C) 2007 NeoDatis Inc. http://www.neodatis.org

"This file is part of the NeoDatis ODB open source object database".

NeoDatis ODB 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; either
version 2.1 of the License, or (at your option) any later version.

NeoDatis ODB 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
*/
package org.neodatis.odb.core.layers.layer2.meta;

import java.util.Map;

import org.neodatis.odb.OID;



/**
 * Meta representation of a null native object
 * @author osmadja
 *
 */
public class NullNativeObjectInfo extends NativeObjectInfo {
	
	public static NullNativeObjectInfo instance = new NullNativeObjectInfo();
	
    private NullNativeObjectInfo() {
        super(null,ODBType.NULL);
    }
	public NullNativeObjectInfo(int odbTypeId) {
		super(null,odbTypeId);
	}
	public NullNativeObjectInfo(ODBType type) {
		super(null,type);
	}

	public String toString() {
		return "null";
	}

	public boolean isNull() {
		return true;
	}
	public boolean isNative(){
		return true;
	}

	
	public AbstractObjectInfo createCopy(Map cache,  boolean onlyData){
		return NullNativeObjectInfo.getInstance();
	}
	/**
	 * @return
	 */
	public static NullNativeObjectInfo getInstance() {
		return instance;
	}
}