001/*
002 * Copyright (C) 2012 eXo Platform SAS.
003 *
004 * This is free software; you can redistribute it and/or modify it
005 * under the terms of the GNU Lesser General Public License as
006 * published by the Free Software Foundation; either version 2.1 of
007 * the License, or (at your option) any later version.
008 *
009 * This software is distributed in the hope that it will be useful,
010 * but WITHOUT ANY WARRANTY; without even the implied warranty of
011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
012 * Lesser General Public License for more details.
013 *
014 * You should have received a copy of the GNU Lesser General Public
015 * License along with this software; if not, write to the Free
016 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
017 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
018 */
019package org.crsh.telnet.term;
020
021import org.crsh.plugin.PluginContext;
022import org.crsh.telnet.term.spi.TermIOHandler;
023
024import java.util.Iterator;
025
026public abstract class TermLifeCycle {
027
028  /** . */
029  private final PluginContext context;
030
031  protected TermLifeCycle(PluginContext context) {
032    if (context == null) {
033      throw new NullPointerException();
034    }
035
036    //
037    this.context = context;
038  }
039
040  public final void init() {
041    try {
042      doInit();
043    } catch (Exception e) {
044      e.printStackTrace();
045    }
046  }
047
048  public final void destroy() {
049    doDestroy();
050  }
051
052  public final TermIOHandler getHandler() {
053    Iterator<TermIOHandler> handlers = context.getPlugins(TermIOHandler.class).iterator();
054    if (handlers.hasNext()) {
055      return handlers.next();
056    } else {
057      return null;
058    }
059  }
060
061  public final PluginContext getContext() {
062    return context;
063  }
064
065  protected abstract void doInit() throws Exception;
066
067  protected abstract void doDestroy();
068
069}