| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| FileUtils |
|
| 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 | * | |
| 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 | 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 | } |