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 }