dbclient.java

Java的面向对象数据库系统的源代码

// You can redistribute this software and/or modify it under the terms of
// the Ozone Core License version 1 published by ozone-db.org.
//
// The original code and portions created by SMB are
// Copyright (C) 1997-@year@ by SMB GmbH. All rights reserved.
//
// $Id: DbClient.java,v 1.4 2002/09/18 06:54:15 per_nyfelt Exp $

package org.ozoneDB.core.DbRemote;

import org.ozoneDB.DxLib.net.DxClient;
import org.ozoneDB.ExternalDatabase;
import org.ozoneDB.core.Env;

import java.io.IOException;


/**
 * @author <a href="http://www.softwarebuero.de/">SMB</a>
 * @version $Revision: 1.4 $Date: 2002/09/18 06:54:15 $
 */
public abstract class DbClient extends DxClient {
    
    protected ExternalDatabase db;
    
    protected String user = "";
    
    
    public DbClient(ExternalDatabase _db,String _user) /*throws IOException*/ {
        db = _db;
        user = _user;
    }
    
    
    public DbClient( ExternalDatabase _db, String _host, int _port, String _user ) throws IOException {
        super( _host, _port );
        db = _db;
        user = _user;
    }
    
    
    public String user() {
        return user;
    } 

    public Object receive() throws IOException, ClassNotFoundException {
        Object result = super.receive();

        if (Env.selfCheck) {
            if (result==null) {
                /*
                System.err.print("DbClient.receive(): result="+result+", here = ");
                new Exception().printStackTrace(System.err);
                */
            }
        }

        return result;
    } 
}