classmanager.java

来自「用Java写的面相对象的数据库管理系统」· Java 代码 · 共 90 行

// 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) 1997-2000 by SMB GmbH. All rights reserved.
//
// $Id: ClassManager.java,v 1.23 2000/10/28 16:55:16 daniela Exp $

package org.ozoneDB.core;

import java.io.*;
import org.ozoneDB.*;
import org.ozoneDB.DxLib.*;
import org.ozoneDB.util.*;


/**
 * @author <a href="http://www.softwarebuero.de/">SMB</a>
 * @version $Revision: 1.23 $Date: 2000/10/28 16:55:16 $
 */
public final class ClassManager {
    
    protected transient Env env;
    
    protected ClassLoader classLoader;
    
    
    public ClassManager( Env _env ) {
        env = _env;
    }
    
    
    public void startup() throws Exception {
        env.logWriter.newEntry( this, "startup...", LogWriter.INFO );
        flushCache();
    } 
    
    
    public void shutdown() throws Exception {
        env.logWriter.newEntry( this, "shutdown...", LogWriter.INFO );
    } 
    
    
    public Class classForName( String name ) throws ClassNotFoundExc {
        if (env.logWriter.hasTarget( LogWriter.DEBUG3 )) {
            env.logWriter.newEntry( this, "classForName(): " + name, LogWriter.DEBUG3 );
        } 
        
        try {
            Class cl = classLoader.loadClass( name );
            
            if (env.logWriter.hasTarget( LogWriter.DEBUG3 )) {
                env.logWriter.newEntry( this, "    class: " + cl.getName() + ", " + cl.hashCode(), LogWriter.DEBUG3 );
            } 
            
            return cl;
        } catch (ClassNotFoundException e) {
            throw new ClassNotFoundExc( e.getMessage() );
        } 
    } 
    
    
    public void registerClass( String fileName ) {
    } 
    
    
    public void flushCache() throws Exception {
        env.logWriter.newEntry( this, "dropClasses()", LogWriter.DEBUG3 );
        classLoader = new OzoneClassLoader11();
    } 
}


/**
 * @author <a href="http://www.softwarebuero.de/">SMB</a>
 * @version $Revision: 1.23 $Date: 2000/10/28 16:55:16 $
 */
class OzoneClass extends DxObject {
    
    protected Class cl;
    
    protected String name;
    
    
    OzoneClass( String _name, Class _cl ) {
        name = _name;
        cl = _cl;
    }
}