filepanel.java

用java写的ftp服务器程序

// $Id: FilePanel.java 306759 2005-10-06 11:39:53 +0530 (Thu, 06 Oct 2005) rana_b $
/*
 * Copyright 2004 The Apache Software Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.ftpserver.gui;

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import org.apache.ftpserver.ftplet.FileObject;
import org.apache.ftpserver.ftplet.User;
import org.apache.ftpserver.interfaces.IConnection;
import org.apache.ftpserver.interfaces.IFtpConfig;

import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTabbedPane;
import javax.swing.JTable;

/**
 * This panel displays all user file upload, download and remove activities.
 *
 * @author <a href="mailto:[e-mail]">Rana Bhattacharyya</a>.
 */
public 
class FilePanel extends PluginPanel {
        
    private static final long serialVersionUID = 3172324853152800934L;

    private final static String HEADERS[] = {
            "Uploaded",
            "Downloaded",
            "Deleted"
    };
    
    private IFtpConfig        m_fconfig;
    private FtpFileTableModel[] m_models;
    
    
    /**
     * Instantiate file panel.
     */
    public FilePanel(PluginPanelContainer container) {
        super(container);
        initComponents();
    }
     
    /**
     * Initialize UI components
     */
    private void initComponents() {
        
        setLayout(new BorderLayout());
        
        
        JTabbedPane tabPane = new JTabbedPane();
        add(tabPane, BorderLayout.CENTER);
        
        m_models = new FtpFileTableModel[3];
        for(int i=0; i<m_models.length; ++i) {
            m_models[i] = new FtpFileTableModel();
            tabPane.addTab(HEADERS[i], createTabComponent(i));
        }
    }
     
    /**
     * Create tab component.
     */
    private JComponent createTabComponent(final int index) {        
        
        JPanel panel = new JPanel(new BorderLayout()); 
        
        JTable fileTable = new JTable(m_models[index]);
        fileTable.setPreferredScrollableViewportSize(new Dimension(470, 300));
        fileTable.setColumnSelectionAllowed(false);
        JScrollPane scrollPane = new JScrollPane(fileTable, 
                                     JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
                                     JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);                          
        panel.add(scrollPane, BorderLayout.CENTER);
        
        
        // button
        JPanel bottomPanel = new JPanel();
        JButton jResetBtn = new JButton("Clear");
        bottomPanel.add(jResetBtn);
        panel.add(bottomPanel, BorderLayout.SOUTH);
        
        // event handler
        jResetBtn.addActionListener(new ActionListener() {
             public void actionPerformed(ActionEvent evt) {
                m_models[index].clear();
             }
        });
        return panel;
    }
    
    /**
     * File upload notification.
     */
    public void notifyUpload(IConnection con, FileObject file, long sz) {
        User user = con.getRequest().getUser();
        m_models[0].newEntry(file.getFullName(), user);
    }
    
    /**
     * File download notification.
     */
    public void notifyDownload(IConnection con, FileObject file, long sz) {
        User user = con.getRequest().getUser();
        m_models[1].newEntry(file.getFullName(), user);
    }
    
    /**
     * File delete notification.
     */
    public void notifyDelete(IConnection con, FileObject file) {
        User user = con.getRequest().getUser();
        m_models[2].newEntry(file.getFullName(), user);
    }
    
    
    /**
     * Refresh the panel - set the ftp config.
     */
    public void refresh(IFtpConfig config) {
        m_fconfig = config;
    }
    
    
    /**
     * Can this panel be displayed.
     */
    public boolean canBeDisplayed() {
        return (m_fconfig != null);
    }
 
    
    /**
     * String representation.
     */
    public String toString() {
        return "File";
    }
}