| /* |
| * Copyright 2003-2007 the original author or authors. |
| * |
| * 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 org.codehaus.groovy.tools; |
| |
| import java.lang.reflect .*; |
| import java.io.FileInputStream; |
| |
| |
| |
| /** |
| * Helper class to help classworlds to load classes. |
| */ |
| public class GroovyStarter { |
| |
| static void printUsage() { |
| System.out.println("possible programs are 'groovyc','groovy','console', and 'groovysh'"); |
| System.exit(1); |
| } |
| |
| |
| public static void rootLoader(String args[]) { |
| String conf = System.getProperty("groovy.starter.conf",null); |
| LoaderConfiguration lc = new LoaderConfiguration(); |
| |
| // evaluate parameters |
| boolean hadMain=false, hadConf=false, hadCP=false; |
| int argsOffset = 0; |
| while (args.length-argsOffset>0 && !(hadMain && hadConf && hadCP)) { |
| if (args[argsOffset].equals("--classpath")) { |
| if (hadCP) break; |
| if (args.length==argsOffset+1) { |
| exit("classpath parameter needs argument"); |
| } |
| lc.addClassPath(args[argsOffset+1]); |
| argsOffset+=2; |
| hadCP=true; |
| } else if (args[argsOffset].equals("--main")) { |
| if (hadMain) break; |
| if (args.length==argsOffset+1) { |
| exit("main parameter needs argument"); |
| } |
| lc.setMainClass(args[argsOffset+1]); |
| argsOffset+=2; |
| hadMain=true; |
| } else if (args[argsOffset].equals("--conf")) { |
| if (hadConf) break; |
| if (args.length==argsOffset+1) { |
| exit("conf parameter needs argument"); |
| } |
| conf=args[argsOffset+1]; |
| argsOffset+=2; |
| hadConf=true; |
| } else { |
| break; |
| } |
| } |
| |
| // this allows to override the commandline conf |
| String confOverride = System.getProperty("groovy.starter.conf.override",null); |
| if (confOverride!=null) conf = confOverride; |
| |
| // we need to know the class we want to start |
| if (lc.getMainClass()==null && conf==null) { |
| exit("no configuration file or main class specified"); |
| } |
| |
| // copy arguments for main class |
| String[] newArgs = new String[args.length-argsOffset]; |
| for (int i=0; i<newArgs.length; i++) { |
| newArgs[i] = args[i+argsOffset]; |
| } |
| // load configuration file |
| if (conf!=null) { |
| try { |
| lc.configure(new FileInputStream(conf)); |
| } catch (Exception e) { |
| System.err.println("exception while configuring main class loader:"); |
| exit(e); |
| } |
| } |
| // create loader and execute main class |
| ClassLoader loader = new RootLoader(lc); |
| Method m=null; |
| try { |
| Class c = loader.loadClass(lc.getMainClass()); |
| m = c.getMethod("main", new Class[]{String[].class}); |
| } catch (ClassNotFoundException e1) { |
| exit(e1); |
| } catch (SecurityException e2) { |
| exit(e2); |
| } catch (NoSuchMethodException e2) { |
| exit(e2); |
| } |
| try { |
| m.invoke(null, new Object[]{newArgs}); |
| } catch (IllegalArgumentException e3) { |
| exit(e3); |
| } catch (IllegalAccessException e3) { |
| exit(e3); |
| } catch (InvocationTargetException e3) { |
| exit(e3); |
| } |
| } |
| |
| private static void exit(Exception e) { |
| e.printStackTrace(); |
| System.exit(1); |
| } |
| |
| private static void exit(String msg) { |
| System.err.println(msg); |
| System.exit(1); |
| } |
| |
| public static void main(String args[]) { |
| try { |
| rootLoader(args); |
| } catch (Throwable t) { |
| t.printStackTrace(); |
| } |
| } |
| } |