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    
020    package org.crsh.shell.impl.command;
021    
022    import org.crsh.command.GroovyScript;
023    import org.crsh.command.GroovyScriptCommand;
024    import org.crsh.command.NoSuchCommandException;
025    import org.crsh.command.ShellCommand;
026    import org.crsh.plugin.PluginContext;
027    import org.crsh.plugin.ResourceKind;
028    
029    import java.security.Principal;
030    
031    public class CRaSH {
032    
033    
034      /** . */
035      final AbstractClassManager<? extends ShellCommand> commandManager;
036    
037      /** . */
038      final AbstractClassManager<? extends GroovyScript> scriptManager;
039    
040      /** . */
041      final PluginContext context;
042    
043      /**
044       * Create a new CRaSH.
045       *
046       * @param context the plugin context
047       * @throws NullPointerException if the context argument is null
048       */
049      public CRaSH(PluginContext context) throws NullPointerException {
050        this(
051          context,
052          new ClassManager<ShellCommand>(context, ResourceKind.COMMAND, ShellCommand.class, GroovyScriptCommand.class),
053          new ClassManager<GroovyScript>(context, ResourceKind.LIFECYCLE, GroovyScript.class, GroovyScript.class)
054        );
055      }
056    
057      public CRaSH(PluginContext context, AbstractClassManager<ShellCommand> commandManager, AbstractClassManager<? extends GroovyScript> scriptManager) {
058        this.context = context;
059        this.commandManager = commandManager;
060        this.scriptManager = scriptManager;
061      }
062    
063      public CRaSHSession createSession(Principal user) {
064        return new CRaSHSession(this, user);
065      }
066    
067      /**
068       * Returns the plugin context.
069       *
070       * @return the plugin context
071       */
072      public PluginContext getContext() {
073        return context;
074      }
075    
076      /**
077       * Attempt to obtain a command instance. Null is returned when such command does not exist.
078       *
079       * @param name the command name
080       * @return a command instance
081       * @throws org.crsh.command.NoSuchCommandException if an error occured preventing the command creation
082       * @throws NullPointerException if the name argument is null
083       */
084      public ShellCommand getCommand(String name) throws NoSuchCommandException, NullPointerException {
085        return commandManager.getInstance(name);
086      }
087    }