/* -*- tab-width: 4 -*-
*
* Electric(tm) VLSI Design System
*
* File: BTree.java
*
* Copyright (c) 2009 Sun Microsystems and Static Free Software
*
* Electric(tm) is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* Electric(tm) 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 Electric(tm); see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, Mass 02111-1307, USA.
*/
package com.sun.electric.database.geometry.btree.unboxed;
import java.io.*;
/**
* A class which knows how to intrepret sequences of bytes as an
* object.
*
* We use this singleton class which performs operations (such as
* comparisons) directly on the byte[]'s rather than using some
* instance of Serializable&Comparable because the latter approach
* puts heavy stress on the garbage collector and -- much more
* importantly -- the memory subsystem. By not instantiating
* heavyweight objects for the keys we let the whole program live
* lower in the meomory hierarchy. GC is nice, except in your
* innermost loops.
*/
public interface Unboxed<V extends Serializable> {
/** Return the size, in bytes, of a value; all values must have the same size */
public int getSize();
/** Deserialize a value; <b>need not be compatible with <tt>V.readObject()</tt></b>! */
public V deserialize(byte[] buf, int ofs);
/** Serialize a value; <b>need not be compatible with <tt>V.writeObject()</tt></b>! */
public void serialize(V v, byte[] buf, int ofs);
}