Coverage Report - org.melati.util.FileUtils
 
Classes in this File Line Coverage Branch Coverage Complexity
FileUtils
45%
11/24
40%
4/10
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  
 }