ftpeventhandler.java

JAVA FTP客户端经典

/*
 * This program 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 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
package net.sf.jftp.event;

import java.lang.reflect.*;
import java.util.ArrayList;
import java.util.Hashtable;
import java.util.StringTokenizer;
import java.util.Vector;

import net.sf.jftp.net.FtpClient;

public class FtpEventHandler implements EventHandler
{
    private FtpClient client;
    private static ArrayList commands = null;
    private Hashtable methods = new Hashtable();

    static {
        commands = new ArrayList();
        commands.add("account");
        commands.add("append");
        commands.add("ascii");
        commands.add("bell");
        commands.add("bye");
        commands.add("cd");
        commands.add("cdup");
        commands.add("chmod");
        commands.add("close");
        commands.add("cr"); // unsupported
        commands.add("delete");
        commands.add("dir");
        commands.add("disconnect");
        commands.add("form"); // unsupported
        commands.add("get");
        commands.add("glob"); // unsupported
        commands.add("hash");
        commands.add("idle");
        commands.add("image");
        commands.add("lcd");
        commands.add("mdelete");
        commands.add("mdir");
        commands.add("mget");
        commands.add("mkdir");
        commands.add("mls");
        commands.add("mode");
        commands.add("modtime");
        commands.add("mput");
        commands.add("newer");
        commands.add("nlist");
        commands.add("open");
        commands.add("passive");
        commands.add("put");
        commands.add("pwd");
        commands.add("quote");
        commands.add("recv");
        commands.add("reget");
        commands.add("rstatus");
        commands.add("rhelp");
        commands.add("rename");
        commands.add("reset");
        commands.add("restart");
        commands.add("rmdir");
        commands.add("runique");
        commands.add("send");
        commands.add("sendport");
        commands.add("site");
        commands.add("size");
        commands.add("status");
        commands.add("struct");
        commands.add("system");
        commands.add("sunique");
        commands.add("type");
        commands.add("user");
    }
    
    public FtpEventHandler()
    {
        this.client = new FtpClient();
        Method[] m = this.getClass().getDeclaredMethods();
        String methodName = null;
        for (int i = 0; i < m.length; i++) {
            methodName = m[i].getName();
            if (commands.contains(methodName))
                methods.put(methodName, m[i]);
        }
    }
    
    public void open(Vector args)
    {
        System.out.println("***open");
        client.login((String)args.elementAt(1));
    }
    
    public void disconnect(Vector args)
    {
        System.out.println("***disconnect");
        client.disconnect();
    }

    public void cd(Vector args)
    {
        System.out.println("***cd");
        client.cd((String)args.elementAt(1));
    }

    public void pwd(Vector args)
    {
        System.out.println("***pwd");
        String directory = client.pwd();
    }

    public void get(Vector args)
    {
        System.out.println("***get");
        client.get((String)args.elementAt(1));
    }

    public void put(Vector args)
    {
        System.out.println("***put");
        client.put((String)args.elementAt(1));
    }

    public void quit(Vector args)
    {
        disconnect(args);
    }

    public boolean handle(Event e)
    {
        System.out.println(e.eventCode());
        System.out.println(((FtpEvent)e).eventMsg());
        StringTokenizer st = new StringTokenizer( ((FtpEvent)e).eventMsg() );
        Vector list = new Vector();
        while (st.hasMoreTokens())
        {
            list.addElement(st.nextToken());
        }
        if (list.size() != 0)
        {
            String command = (String)list.elementAt(0);
            Method o = (Method)methods.get(command.toLowerCase());
            if (o != null)
            {
                 try {
                     o.invoke(this, new Object[] { list }); 
                 } catch (Exception ex) {}
            }
        }
        return true;
    }
}