Name	method, %	comment, %	TODO	@see
smallsql.database.IndexNodeFile	4	14,6%   (207/1214)	0	0

/* =============================================================
 * SmallSQL : a free Java DBMS library for the Java(tm) platform
 * =============================================================
 *
 * (C) Copyright 2004-2006, by Volker Berlin.
 *
 * Project Info:  http://www.smallsql.de/
 *
 * This library 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.
 *
 * This library 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.  
 *
 * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
 * in the United States and other countries.]
 *
 * ---------------
 * IndexNodeFile.java
 * ---------------
 * Author: Volker Berlin
 * 
 */
package smallsql.database;

import java.io.*;
/**
 * @author Volker Berlin
 *
 */
public class IndexNodeFile extends IndexNode {

	private final RandomAccessFile file;
	private long fileOffset;
	
	/**
	 * Create a new Node in the Index.
	 * @param unique descript if it is a unique index (primary key) or a multi value index is.
	 */
	IndexNodeFile(boolean unique, char digit, RandomAccessFile file){
		super(unique, digit);
		this.file = file;
	}
	
	void save() throws Exception{
		MemoryStream output = new MemoryStream();
		save(output);
		file.seek(fileOffset);
		output.writeTo(file);
	}
	
	void saveRef(MemoryStream output){
		output.writeLong(fileOffset);
	}
	
	IndexNode readRef(MemoryStream input){
		IndexNodeFile node = new IndexNodeFile(getUnique(), (char)0, file);
		fileOffset = input.readLong();
		return node;	
	}
}