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Java > Open Source Codes > com > caucho > make > AlwaysModified


1 /*
2  * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
3  *
4  * This file is part of Resin(R) Open Source
5  *
6  * Each copy or derived work must preserve the copyright notice and this
7  * notice unmodified.
8  *
9  * Resin Open Source is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * Resin Open Source is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17  * of NON-INFRINGEMENT. See the GNU General Public License for more
18  * details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with Resin Open Source; if not, write to the
22  *
23  * Free Software Foundation, Inc.
24  * 59 Temple Place, Suite 330
25  * Boston, MA 02111-1307 USA
26  *
27  * @author Scott Ferguson
28  */
29
30 package com.caucho.make;
31
32 import com.caucho.vfs.PersistentDependency;
33
34 /**
35  * Interface representing a resource that always changes.
36  */
37 public class AlwaysModified implements PersistentDependency {
38   private static AlwaysModified ALWAYS_MODIFIED = new AlwaysModified();
39
40   private AlwaysModified()
41   {
42   }
43
44   public static AlwaysModified create()
45   {
46     return ALWAYS_MODIFIED;
47   }
48   
49   /**
50    * Returns true if the underlying resource has changed.
51    */
52   public boolean isModified()
53   {
54     return true;
55   }
56
57   public String JavaDoc getJavaCreateString()
58   {
59     return "com.caucho.make.AlwaysModified.create()";
60   }
61
62   public String JavaDoc toString()
63   {
64     return "AlwaysModified[]";
65   }
66 }
67
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