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
020package org.crsh.cli.impl.bootstrap;
021
022import org.crsh.cli.impl.Delimiter;
023import org.crsh.cli.impl.descriptor.HelpDescriptor;
024import org.crsh.cli.impl.lang.CommandFactory;
025import org.crsh.cli.impl.invocation.InvocationMatch;
026import org.crsh.cli.impl.invocation.InvocationMatcher;
027import org.crsh.cli.impl.lang.Instance;
028import org.crsh.cli.impl.lang.ObjectCommandDescriptor;
029import org.crsh.cli.impl.lang.Util;
030
031import java.util.Iterator;
032import java.util.ServiceLoader;
033
034/** @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a> */
035public class Main {
036
037  public static void main(String[] args) throws Exception {
038    ServiceLoader<CommandProvider> loader = ServiceLoader.load(CommandProvider.class);
039    Iterator<CommandProvider> iterator = loader.iterator();
040    if (iterator.hasNext()) {
041
042      //
043      StringBuilder line = new StringBuilder();
044      for (int i = 0;i < args.length;i++) {
045        if (i  > 0) {
046          line.append(' ');
047        }
048        Delimiter.EMPTY.escape(args[i], line);
049      }
050
051      //
052      CommandProvider commandProvider = iterator.next();
053      Class<?> commandClass = commandProvider.getCommandClass();
054      handle(commandClass, line.toString());
055    }
056  }
057
058  private static <T> void handle(Class<T> commandClass, String line) throws Exception {
059    ObjectCommandDescriptor<T> descriptor = CommandFactory.DEFAULT.create(commandClass);
060    HelpDescriptor<Instance<T>> helpDescriptor = HelpDescriptor.create(descriptor);
061    InvocationMatcher<Instance<T>> matcher = helpDescriptor.matcher();
062    InvocationMatch<Instance<T>> match = matcher.parse(line);
063    final T instance = commandClass.newInstance();
064    Object o = match.invoke(Util.wrap(instance));
065    if (o != null) {
066      System.out.println(o);
067    }
068  }
069}