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.cli.impl.bootstrap;
021    
022    import org.crsh.cli.impl.descriptor.CommandDescriptorImpl;
023    import org.crsh.cli.impl.Delimiter;
024    import org.crsh.cli.impl.descriptor.HelpDescriptor;
025    import org.crsh.cli.impl.lang.CommandFactory;
026    import org.crsh.cli.impl.invocation.InvocationMatch;
027    import org.crsh.cli.impl.invocation.InvocationMatcher;
028    
029    import java.util.Iterator;
030    import java.util.ServiceLoader;
031    
032    /** @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a> */
033    public 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    }