##### Coverage Report - org.melati.util.FileUtils

Classes in this File | Line Coverage | Branch Coverage | Complexity
FileUtils |
45% | 10/22
40% | 4/10
| 3.0;3

1 |  |
     /*
2 |  |
      * $Source: /usr/cvsroot/melati/melati/src/site/resources/withWebmacro/org.melati.util.FileUtils.html,v $
3 |  |
      * $Revision: 1.1 $
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 |  |
      *
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      * 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 |  |
      *
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      * 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 |  |
      *
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      * Contact details for copyright holder:
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      *
41 |  |
      *     Myles Chippendale <mylesc At paneris.org>
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      *     http://paneris.org/
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      *     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 |  |
       /**
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        * 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 | 14 |
         String directory = file.getParent();
77 | 14 |
         String filename = file.getName();
78 | 14 |
         int dot = filename.lastIndexOf(".");
79 | 14 |
         String start = (dot != -1) ? filename.substring(0,dot) : filename;
80 | 14 |
         String extension =
81 |  |
             (dot != -1) ? filename.substring(dot,filename.length()) : "";
82 |  |
83 | 14 |
         int count = 0;
84 | 6805 |
         while (file.exists()) {
85 | 6791 |
           filename = start + (count++) + extension;
86 | 6791 |
           file = new File(directory, filename);
87 |  |
         }
88 | 14 |
         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 |  |
                     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 |  |
     }