Util


1   /**
2    * <copyright>
3    *
4    * Copyright (c) 2004-2005 IBM Corporation and others.
5    * All rights reserved.   This program and the accompanying materials
6    * are made available under the terms of the Eclipse Public License v1.0
7    * which accompanies this distribution, and is available at
8    * http://www.eclipse.org/legal/epl-v10.html
9    * 
10   * Contributors: 
11   *   IBM - Initial API and implementation
12   *
13   * </copyright>
14   *
15   * $Id: Util.java,v 1.4 2005/06/08 06:17:17 nickb Exp $
16   */
17  package org.eclipse.emf.ant.util;
18  
19  import java.io.BufferedWriter  ;
20  import java.io.File  ;
21  import java.io.FileWriter  ;
22  import java.io.IOException  ;
23  
24  
25  /**
26   * Utility classes with generic methods that may be used by more than one task.
27   * @since 2.1.0
28   */
29  public class Util
30  {
31    /**
32     * Removes the version number of all the subdirectories of a given directory.
33     * The expected format of the directories name is <dirName>_<version> where version 
34     * has at least 2 groups (2.1 for example).
35     *  
36     * @param parentDir the parent of the directories that will have the version removed
37     * @return the number of changed directories
38     */
39    public static int removeVersion(File   parentDir)
40    {
41      if (parentDir == null || !parentDir.isDirectory())
42      {
43        return 0;
44      }
45  
46      int counter = 0;
47      File  [] dirs = parentDir.listFiles();
48      for (int i = 0; i < dirs.length; i++)
49      {
50        if (dirs[i].isDirectory())
51        {
52          String   name = dirs[i].getName().replaceAll("_(\\d+\\.)+\\d$", "");
53          if (!name.equals(dirs[i].getName()) && dirs[i].renameTo(new File  (parentDir, name)))
54          {
55            counter++;
56          }
57        }
58      }
59      return counter;
60    }
61  
62    /**
63     * Writes the given content to the specifed file. 
64     * @param file The file to be written or overwritten.
65     * @param content
66     * @throws IOException
67     */
68    public static void writeFile(File   file, String   content) throws IOException  
69    {
70      if (!file.getParentFile().isDirectory())
71      {
72        file.getParentFile().mkdirs();
73      }
74      
75      BufferedWriter   out = null;
76      try
77      {
78        out = new BufferedWriter  (new FileWriter  (file));
79        out.write(content);
80      }
81      finally
82      {
83        if (out != null)
84        {
85          out.close();
86        }
87      }
88    }
89  }
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