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.Delimiter; 023 import org.crsh.cli.impl.descriptor.HelpDescriptor; 024 import org.crsh.cli.impl.lang.CommandFactory; 025 import org.crsh.cli.impl.invocation.InvocationMatch; 026 import org.crsh.cli.impl.invocation.InvocationMatcher; 027 import org.crsh.cli.impl.lang.Instance; 028 import org.crsh.cli.impl.lang.ObjectCommandDescriptor; 029 import org.crsh.cli.impl.lang.Util; 030 031 import java.util.Iterator; 032 import java.util.ServiceLoader; 033 034 /** @author <a href="mailto:julien.viet@exoplatform.com">Julien Viet</a> */ 035 public 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 }