Quadcap Embeddable Database

com/quadcap/sql/io/ObjectOutputStream.java

Go to the documentation of this file.

package com.quadcap.sql.io;

/* Copyright 1999 - 2003 Quadcap Software.  All rights reserved.
 *
 * This software is distributed under the Quadcap Free Software License.
 * This software may be used or modified for any purpose, personal or
 * commercial.  Open Source redistributions are permitted.  Commercial
 * redistribution of larger works derived from, or works which bundle
 * this software requires a "Commercial Redistribution License"; see
 * http://www.quadcap.com/purchase.
 *
 * Redistributions qualify as "Open Source" under  one of the following terms:
 *   
 *    Redistributions are made at no charge beyond the reasonable cost of
 *    materials and delivery.
 *
 *    Redistributions are accompanied by a copy of the Source Code or by an
 *    irrevocable offer to provide a copy of the Source Code for up to three
 *    years at the cost of materials and delivery.  Such redistributions
 *    must allow further use, modification, and redistribution of the Source
 *    Code under substantially the same terms as this license.
 *
 * Redistributions of source code must retain the copyright notices as they
 * appear in each source code file, these license terms, and the
 * disclaimer/limitation of liability set forth as paragraph 6 below.
 *
 * Redistributions in binary form must reproduce this Copyright Notice,
 * these license terms, and the disclaimer/limitation of liability set
 * forth as paragraph 6 below, in the documentation and/or other materials
 * provided with the distribution.
 *
 * The Software is provided on an "AS IS" basis.  No warranty is
 * provided that the Software is free of defects, or fit for a
 * particular purpose.  
 *
 * Limitation of Liability. Quadcap Software shall not be liable
 * for any damages suffered by the Licensee or any third party resulting
 * from use of the Software.
 */

import java.io.Externalizable;
import java.io.IOException;
import java.io.ObjectOutput;
import java.io.OutputStream;

import java.util.Vector;

import com.quadcap.util.Debug;

/**
 * ObjectOutputStream based on this package's serialization format.
 *
 * @author Stan Bailes
 */
public class ObjectOutputStream
extends DataOutputStream
implements ObjectOutput
{
    
    public ObjectOutputStream() {
        super(null);
    }
    
    public ObjectOutputStream(OutputStream os) {
        super(os);
    }
    
    final void writeObject(Externable ext) throws IOException {
        Extern extern = ext.getExtern();
        extern.writeObject(this, ext);
    }

    public void writeObject(Object obj) throws IOException {
        if (obj == null) {
            write(0);
        } else if (obj instanceof Externable) {
            Extern extern = ((Externable)obj).getExtern();
            extern.writeObject(this, obj);
        } else {
            String className = obj.getClass().getName();
            Extern extern = Extern.get(className);
            if (extern == null) {
                throw new IOException("Not externalizable: " + className);
            }
            extern.writeObject(this, obj);
        }
    }
}