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 */ 019 package org.crsh.telnet.term; 020 021 import org.crsh.plugin.PluginContext; 022 import org.crsh.telnet.term.spi.TermIOHandler; 023 024 import java.util.Iterator; 025 026 public 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 }