dxclassloader.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 Library 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: DxClassLoader.java,v 1.2 2003/01/23 18:07:00 per_nyfelt Exp $

package org.ozoneDB.DxLib;


/**
 */
class DxClass extends DxObject {
    final static long serialVersionUID = 1L;

    Class clazz;
    DxString name;


    DxClass( DxString clazzName ) throws ClassNotFoundException{
        name = clazzName;
        // todo: uncommented until verified that it works
        // todo: maybe we should use ClassManager here instead ot Thread.currentThread...?
        // clazz = Class.forName( clazzName.toString() );
        clazz = Thread.currentThread().getContextClassLoader().loadClass( clazzName.toString() );
    }


    Class clazz() {
        return clazz;
    }


    DxString name() {
        return name;
    }
}


/**
 *
 *
 * @author <a href="http://www.softwarebuero.de/">SMB</a>
 * @version $Revision: 1.2 $Date: 2003/01/23 18:07:00 $
 */
public class DxClassLoader extends Object {
    static DxMap clazzes = new DxHashMap();


    public DxClassLoader() {
    }


    public static Class classForName( String name ) throws ClassNotFoundException {
        return classForName( new DxString( name ) );
    }


    public static Class classForName( DxString name ) throws ClassNotFoundException {
        DxClass c = (DxClass)clazzes.elementForKey( name );
        if (c == null) {
            c = new DxClass( name );
            clazzes.addForKey( c, c.name() );
        }

        return c.clazz();
    }


    public static void registerClass( DxString fileName ) {
        // not implemented yet
    }
}