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.plugin; 020 021 import java.util.Collections; 022 import java.util.LinkedHashSet; 023 024 public class SimplePluginDiscovery implements PluginDiscovery { 025 026 /** . */ 027 private final LinkedHashSet<CRaSHPlugin<?>> plugins; 028 029 public SimplePluginDiscovery() { 030 this.plugins = new LinkedHashSet<CRaSHPlugin<?>>(); 031 } 032 033 public SimplePluginDiscovery(CRaSHPlugin<?>... plugins) { 034 this(); 035 for (CRaSHPlugin<?> plugin : plugins) { 036 add(plugin); 037 } 038 } 039 /** 040 * Add a plugin. 041 * 042 * @param plugin the plugin 043 * @return this object 044 * @throws NullPointerException if the plugin is null 045 */ 046 public SimplePluginDiscovery add(CRaSHPlugin<?> plugin) throws NullPointerException { 047 if (plugin == null) { 048 throw new NullPointerException(); 049 } 050 plugins.add(plugin); 051 return this; 052 } 053 054 public Iterable<CRaSHPlugin<?>> getPlugins() { 055 return Collections.unmodifiableSet(plugins); 056 } 057 }