| /* |
| * Copyright 2007 Google Inc. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.tonicsystems.jarjar; |
| |
| import java.io.File; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| class MainUtil { |
| public static void runMain(Object main, String[] args, String defCommand) throws Exception { |
| if (args.length > 0) { |
| String command = args[0]; |
| Method[] methods = main.getClass().getMethods(); |
| for (int i = 0; i < methods.length; i++) { |
| Method method = methods[i]; |
| if (method.getName().equals(command)) { |
| String[] remaining = new String[args.length - 1]; |
| System.arraycopy(args, 1, remaining, 0, remaining.length); |
| try { |
| method.invoke(main, bindParameters(method, remaining)); |
| } catch (InvocationTargetException e) { |
| Throwable cause = e.getCause(); |
| if (cause instanceof IllegalArgumentException) { |
| System.err.println("Syntax error: " + cause.getMessage()); |
| } else if (cause instanceof Exception) { |
| throw (Exception) cause; |
| } else { |
| throw e; |
| } |
| } |
| return; |
| } |
| } |
| } |
| if (defCommand != null) { |
| runMain(main, new String[] {defCommand}, null); |
| } |
| } |
| |
| private static Object[] bindParameters(Method method, String[] args) { |
| List<Object> parameters = new ArrayList<Object>(); |
| Class[] parameterTypes = method.getParameterTypes(); |
| for (int i = 0, len = parameterTypes.length; i < len; i++) { |
| Class type = parameterTypes[i]; |
| int remaining = Math.max(0, args.length - i); |
| if (type.equals(String[].class)) { |
| String[] rest = new String[remaining]; |
| System.arraycopy(args, 1, rest, 0, remaining); |
| parameters.add(rest); |
| } else if (remaining > 0) { |
| parameters.add(convertParameter(args[i], parameterTypes[i])); |
| } else { |
| parameters.add(null); |
| } |
| } |
| return parameters.toArray(); |
| } |
| |
| private static Object convertParameter(String arg, Class type) { |
| if (type.equals(String.class)) { |
| return arg; |
| } else if (type.equals(Integer.class)) { |
| return Integer.valueOf(arg, 10); |
| } else if (type.equals(File.class)) { |
| return new File(arg); |
| } else { |
| throw new UnsupportedOperationException("Unknown type " + type); |
| } |
| } |
| } |