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.lang.groovy;
020    
021    import org.crsh.cli.impl.completion.CompletionMatch;
022    import org.crsh.plugin.CRaSHPlugin;
023    import org.crsh.repl.EvalResponse;
024    import org.crsh.repl.Repl;
025    import org.crsh.repl.ReplSession;
026    
027    import java.util.logging.Logger;
028    
029    /**
030     * @author Julien Viet
031     */
032    public class GroovyRepl extends CRaSHPlugin<Repl> implements Repl {
033    
034      /** . */
035      static final Logger log = Logger.getLogger(GroovyRepl.class.getName());
036    
037      /** . */
038      private static final Repl groovyRepl = getREPL();
039    
040      public static Repl getREPL() {
041        try {
042          Class<Repl> groovyReplClass = (Class<Repl>)GroovyRepl.class.getClassLoader().loadClass("org.crsh.lang.groovy.GroovyReplImpl");
043          return groovyReplClass.newInstance();
044        }
045        catch (Exception e) {
046          log.info("Plugin is inactive");
047          return null;
048        }
049        catch (NoClassDefFoundError e) {
050          log.info("Plugin is inactive");
051          return null;
052        }
053      }
054    
055      @Override
056      public Repl getImplementation() {
057        return this;
058      }
059    
060      @Override
061      public boolean isActive() {
062        return groovyRepl != null;
063      }
064    
065      @Override
066      public String getName() {
067        return "groovy";
068      }
069    
070      @Override
071      public String getDescription() {
072        return "The Groovy REPL provides a Groovy interpreter able to interact with shell commands";
073      }
074    
075      @Override
076      public EvalResponse eval(ReplSession session, String request) {
077        if (groovyRepl != null) {
078          return groovyRepl.eval(session, request);
079        } else {
080          throw new IllegalStateException("Groovy REPL is not available");
081        }
082      }
083    
084      @Override
085      public CompletionMatch complete(ReplSession session, String prefix) {
086        if (groovyRepl != null) {
087          return groovyRepl.complete(session, prefix);
088        } else {
089          throw new IllegalStateException("Groovy REPL is not available");
090        }
091      }
092    }