1 package org.codehaus.mojo.macker;
2
3 /*
4 * Licensed to the Apache Software Foundation (ASF) under one
5 * or more contributor license agreements. See the NOTICE file
6 * distributed with this work for additional information
7 * regarding copyright ownership. The ASF licenses this file
8 * to you under the Apache License, Version 2.0 (the
9 * "License"); you may not use this file except in compliance
10 * with the License. You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing,
15 * software distributed under the License is distributed on an
16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND, either express or implied. See the License for the
18 * specific language governing permissions and limitations
19 * under the License.
20 */
21
22 import java.io.FileInputStream;
23 import java.io.InputStreamReader;
24 import java.io.Reader;
25 import java.lang.reflect.InvocationTargetException;
26 import java.lang.reflect.Method;
27 import java.util.ArrayList;
28 import java.util.List;
29
30 import org.apache.commons.io.IOUtils;
31
32 /**
33 * Wrapper for calling a Java main method with a number of arguments.
34 * @author <a href="http://www.code-cop.org/">Peter Kofler</a>
35 */
36 public class CommandLineFile
37 {
38
39 public static void main( String[] args )
40 throws Exception
41 {
42 if ( args.length == 0 || args.length > 2 )
43 {
44 System.err.println( "Usage: CommandLineFile <main class> [command line arguments file]" );
45 System.exit( 1 );
46 }
47
48 String className = args[0];
49 Class clazz = Class.forName( className );
50 Method main = clazz.getMethod( "main", new Class[] { String[].class } );
51
52 List/*<String>*/lines = new ArrayList/*<String>*/();
53 if ( args.length == 2 )
54 {
55 Reader in = new InputStreamReader( new FileInputStream( args[1] ), "UTF-8" );
56 try
57 {
58 lines = IOUtils.readLines( in );
59 }
60 finally
61 {
62 in.close();
63 }
64 }
65
66 try
67 {
68 main.invoke( null, new Object[] { lines.toArray( new String[lines.size()] ) } );
69 }
70 catch ( InvocationTargetException ex )
71 {
72 Throwable cause = ex.getTargetException();
73 if ( cause instanceof Error )
74 {
75 throw (Error) cause;
76 }
77 throw (Exception) cause;
78 }
79 }
80 }