Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
FileUtils |
|
| 3.0;3 |
1 | /* | |
2 | * $Source$ | |
3 | * $Revision$ | |
4 | * | |
5 | * Copyright (C) 2000 Myles Chippendale | |
6 | * | |
7 | * Part of Melati (http://melati.org), a framework for the rapid | |
8 | * development of clean, maintainable web applications. | |
9 | * | |
10 | * Melati is free software; Permission is granted to copy, distribute | |
11 | * and/or modify this software under the terms either: | |
12 | * | |
13 | * a) the GNU General Public License as published by the Free Software | |
14 | * Foundation; either version 2 of the License, or (at your option) | |
15 | * any later version, | |
16 | * | |
17 | * or | |
18 | * | |
19 | * b) any version of the Melati Software License, as published | |
20 | * at http://melati.org | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License and | |
23 | * the Melati Software License along with this program; | |
24 | * if not, write to the Free Software Foundation, Inc., | |
25 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA to obtain the | |
26 | * GNU General Public License and visit http://melati.org to obtain the | |
27 | * Melati Software License. | |
28 | * | |
29 | * Feel free to contact the Developers of Melati (http://melati.org), | |
30 | * if you would like to work out a different arrangement than the options | |
31 | * outlined here. It is our intention to allow Melati to be used by as | |
32 | * wide an audience as possible. | |
33 | * | |
34 | * This program is distributed in the hope that it will be useful, | |
35 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
36 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
37 | * GNU General Public License for more details. | |
38 | * | |
39 | * Contact details for copyright holder: | |
40 | * | |
41 | * Myles Chippendale <mylesc At paneris.org> | |
42 | * http://paneris.org/ | |
43 | * 29 Stanley Road, Oxford, OX4 1QY, UK | |
44 | */ | |
45 | ||
46 | package org.melati.util; | |
47 | ||
48 | import java.io.IOException; | |
49 | import java.io.File; | |
50 | import java.io.FileOutputStream; | |
51 | ||
52 | /** | |
53 | * An assortment of useful operations on <code>File</code>s. | |
54 | */ | |
55 | public final class FileUtils { | |
56 | ||
57 | 0 | private FileUtils() {} |
58 | ||
59 | /** | |
60 | * Returns a File in the given <code>directory</code> which does | |
61 | * not already exist. | |
62 | * | |
63 | * This file is found by starting with the given | |
64 | * <code>filename</code>. If a file of this name already exists we | |
65 | * put 0 then 1,2,... before the extension until we find one that | |
66 | * does not exists. | |
67 | * <p> | |
68 | * For instance, if <code>newfile.txt</code> exists then we | |
69 | * check <code>newfile0.txt</code>, <code>newfile1.txt</code>, ... | |
70 | * until we find a new filename. | |
71 | * | |
72 | * @return a new File whose name has been made unique | |
73 | */ | |
74 | ||
75 | public static File withUniqueName(File file) { | |
76 | 7 | String directory = file.getParent(); |
77 | 7 | String filename = file.getName(); |
78 | 7 | int dot = filename.lastIndexOf("."); |
79 | 7 | String start = (dot != -1) ? filename.substring(0,dot) : filename; |
80 | 7 | String extension = |
81 | 7 | (dot != -1) ? filename.substring(dot,filename.length()) : ""; |
82 | ||
83 | 7 | int count = 0; |
84 | 496 | while (file.exists()) { |
85 | 489 | filename = start + (count++) + extension; |
86 | 489 | file = new File(directory, filename); |
87 | } | |
88 | 7 | return file; |
89 | } | |
90 | ||
91 | /** | |
92 | * Write a byte array to a given file. | |
93 | * @param file file to write to | |
94 | * @param data to write to file | |
95 | * @return File with data written to it | |
96 | */ | |
97 | public static File writeFile(File file, byte[] data) throws IOException { | |
98 | 0 | FileOutputStream os=new FileOutputStream(file); |
99 | 0 | os.write(data); |
100 | 0 | os.close(); |
101 | 0 | return file; |
102 | } | |
103 | ||
104 | /** | |
105 | * Mark a file as executable. Does <TT>chmod +x <I>file</I></TT> on | |
106 | * Unix, else does nothing. | |
107 | */ | |
108 | public static void makeExecutable(File file) throws IOException { | |
109 | 0 | if (File.separatorChar == '/') |
110 | // we're unix | |
111 | try { | |
112 | 0 | if (Runtime.getRuntime().exec( |
113 | 0 | new String[] { "chmod", "+x", file.getPath() }).waitFor() != 0) |
114 | 0 | throw new IOException("chmod +x " + file + " failed"); |
115 | } | |
116 | 0 | catch (InterruptedException e) { |
117 | 0 | throw new IOException("Interrupted waiting for chmod +x " + file); |
118 | 0 | } |
119 | 0 | } |
120 | } |