1 package org.apache.maven.simian;
2
3 /* ====================================================================
4 * Copyright 2001-2004 The Apache Software Foundation.
5 *
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 * ====================================================================
18 */
19
20 import java.io.File;
21
22 import java.net.URL;
23
24 import java.util.StringTokenizer;
25
26 /**
27 *
28 * @author Aslak Hellesoy
29 * @version $Revision: 371231 $
30 */
31 public class FileUtils
32 {
33 /**
34 * Returns the root directory of the package hierarchy where this class is
35 * located. This will either be a directory or a jar file.
36 *
37 * @return the root directory or jar file where the class is located.
38 */
39 public static File getRoot( Class clazz )
40 {
41 File dir;
42 URL classURL =
43 clazz.getResource( "/" + clazz.getName().replace( '.', '/' )
44 + ".class" );
45 String classFile = classURL.getFile();
46
47 if ( classFile.indexOf( '!' ) != -1 )
48 {
49 // Sometimes (at least on windows) we get file:F:\bla. Convert to file:/F:/bla
50 if ( classFile.charAt( 5 ) != '/' )
51 {
52 classFile = "file:/" + classFile.substring( 5 );
53 }
54
55 classFile = classFile.replace( '\\', '/' );
56
57 String uriSpec = classFile.substring( 0, classFile.indexOf( '!' ) );
58
59 dir = new File( uriSpec );
60
61 // NOTE: This used to be here, but I've replaced it with the above single
62 // line without understanding the ramifications. The code below needs JDK1.4
63 //try {
64 // dir = new File( new URL( uriSpec ) );
65 //} catch (URISyntaxException e) {
66 // System.err.println("Couldn't create URI for " + uriSpec);
67 // throw new IllegalStateException(e.getMessage());
68 //}
69 }
70 else
71 {
72 dir = new File( classFile ).getParentFile();
73
74 StringTokenizer st = new StringTokenizer( clazz.getName(), "." );
75
76 for ( int i = 0; i < ( st.countTokens() - 1 ); i++ )
77 {
78 dir = dir.getParentFile();
79 }
80 }
81
82 return dir;
83 }
84 }