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