pluginresurlconnection.java

java写的多功能文件编辑器

/*
 * PluginResURLConnection.java - Jext plugin resource URL connection
 * Copyright (C) 1999, 2000 Slava Pestov
 *
 * 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 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 org.jext.protocol.jextresource;

import java.io.*;
import java.net.*;
import java.text.MessageFormat;
import org.jext.*;

public class PluginResURLConnection extends URLConnection
{
  // private members
  private InputStream in;

  public PluginResURLConnection(URL url) throws IOException
  {
    super(url);

    String file = url.getFile();
    int index = file.indexOf('/', 1);
    if (index == -1)
      throw new IOException("Invalid plugin resource URL");

    int start;
    if (file.charAt(0) == '/')
      start = 1;
    else
      start = 0;

    int pluginIndex = Integer.parseInt(file.substring(start, index));
    in = JARClassLoader.getClassLoader(pluginIndex).getResourceAsStream(file.substring(index + 1));
  }

  public void connect() { }

  public InputStream getInputStream() throws IOException
  {
    return in;
  }

  public String getHeaderField(String name)
  {
    if (name.equals("content-type"))
    {
      String filename = getURL().getFile().toLowerCase();
      if (filename.endsWith(".html"))
        return "text/html";
      else if (filename.endsWith(".txt"))
        return "text/plain";
      else if (filename.endsWith(".rtf"))
        return "text/rtf";
      else if (filename.endsWith(".gif"))
        return "image/gif";
      else if (filename.endsWith(".jpg") || filename.endsWith(".jpeg"))
        return "image/jpeg";
      else
        return null;
    } else
      return null;
  }
}

// End of PluginResURLConnection.java