01: /*
02: * Copyright (c) 1998-2008 Caucho Technology -- all rights reserved
03: *
04: * This file is part of Resin(R) Open Source
05: *
06: * Each copy or derived work must preserve the copyright notice and this
07: * notice unmodified.
08: *
09: * 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 java.util.logging.Logger;
33:
34: import com.caucho.vfs.PersistentDependency;
35:
36: /**
37: * Interface representing a resource that always changes.
38: */
39: public class AlwaysModified implements PersistentDependency {
40: private static AlwaysModified ALWAYS_MODIFIED = new AlwaysModified();
41:
42: private AlwaysModified() {
43: }
44:
45: public static AlwaysModified create() {
46: return ALWAYS_MODIFIED;
47: }
48:
49: /**
50: * Returns true if the underlying resource has changed.
51: */
52: public boolean isModified() {
53: return true;
54: }
55:
56: /**
57: * Log the reason for modification
58: */
59: public boolean logModified(Logger log) {
60: return true;
61: }
62:
63: public String getJavaCreateString() {
64: return "com.caucho.make.AlwaysModified.create()";
65: }
66:
67: public String toString() {
68: return "AlwaysModified[]";
69: }
70: }
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