001 /* 002 * Copyright (C) 2010 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.plugin; 020 021 import java.util.Collections; 022 import java.util.LinkedHashSet; 023 024 /** 025 * A simple implemention of {@link PluginDiscovery} where the plugins are explictly provided. 026 * 027 * @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a> 028 */ 029 public class SimplePluginDiscovery implements PluginDiscovery { 030 031 /** . */ 032 private final LinkedHashSet<CRaSHPlugin<?>> plugins; 033 034 public SimplePluginDiscovery() { 035 this.plugins = new LinkedHashSet<CRaSHPlugin<?>>(); 036 } 037 038 public SimplePluginDiscovery(CRaSHPlugin<?>... plugins) { 039 this(); 040 for (CRaSHPlugin<?> plugin : plugins) { 041 add(plugin); 042 } 043 } 044 /** 045 * Add a plugin. 046 * 047 * @param plugin the plugin 048 * @return this object 049 * @throws NullPointerException if the plugin is null 050 */ 051 public SimplePluginDiscovery add(CRaSHPlugin<?> plugin) throws NullPointerException { 052 if (plugin == null) { 053 throw new NullPointerException(); 054 } 055 plugins.add(plugin); 056 return this; 057 } 058 059 public Iterable<CRaSHPlugin<?>> getPlugins() { 060 return Collections.unmodifiableSet(plugins); 061 } 062 }