plugin.java

java 平台 telnet 繁体中文版

/*
 * This file is part of "The Java Telnet Application".
 *
 * This 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, or (at your option)
 * any later version.
 *
 * "The Java Telnet Application" 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 software; see the file COPYING.  If not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */
package de.mud.jta;

import java.io.IOException;

/**
 * Plugin base class for the Java Telnet Application. A plugin is a component
 * for the PluginBus and may occur several times. If we have more than one
 * plugin of the same type the protected value id contains the unique plugin
 * id as configured in the configuration.
 * <P>
 * <B>Maintainer:</B> Matthias L. Jugel
 *
 * @version $Id: Plugin.java,v 2.1 2000/01/26 15:34:05 leo Exp $
 * @author Matthias L. Jugel, Marcus Mei遪er
 */
public class Plugin {
  /** holds the plugin bus used for communication between plugins */
  protected PluginBus bus;
  /** 
   * in case we have several plugins of the same type this contains their
   * unique id
   */
  protected String id;

  /**
   * Create a new plugin and set the plugin bus used by this plugin and
   * the unique id. The unique id may be null if there is only one plugin
   * used by the system.
   * @param bus the plugin bus
   * @param id the unique plugin id
   */
  public Plugin(PluginBus bus, String id) {
    this.bus = bus;
    this.id = id;
  }

  /**
   * Print an error message to stderr prepending the plugin name. This method
   * is public due to compatibility with Java 1.1
   * @param msg the error message
   */
  public void error(String msg) {
    String name = getClass().toString();
    name = name.substring(name.lastIndexOf('.')+1);
    System.err.println(name + (id != null ? "("+id+")" : "") +": "+msg);
  }
}