1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
/*
* ProGuard -- shrinking, optimization, obfuscation, and preverification
* of Java bytecode.
*
* Copyright (c) 2002-2015 Eric Lafortune @ GuardSquare
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package proguard;
import java.io.File;
/**
* This class checks whether the output is up to date.
*
* @author Eric Lafortune
*/
public class UpToDateChecker
{
private final Configuration configuration;
/**
* Creates a new UpToDateChecker with the given configuration.
*/
public UpToDateChecker(Configuration configuration)
{
this.configuration = configuration;
}
/**
* Returns whether the output is up to date, based on the modification times
* of the input jars, output jars, and library jars (or directories).
*/
public boolean check()
{
try
{
ModificationTimeChecker checker = new ModificationTimeChecker();
checker.updateInputModificationTime(configuration.lastModified);
ClassPath programJars = configuration.programJars;
ClassPath libraryJars = configuration.libraryJars;
// Check the dates of the program jars, if any.
if (programJars != null)
{
for (int index = 0; index < programJars.size(); index++)
{
// Update the input and output modification times.
ClassPathEntry classPathEntry = programJars.get(index);
checker.updateModificationTime(classPathEntry.getFile(),
classPathEntry.isOutput());
}
}
// Check the dates of the library jars, if any.
if (libraryJars != null)
{
for (int index = 0; index < libraryJars.size(); index++)
{
// Update the input modification time.
ClassPathEntry classPathEntry = libraryJars.get(index);
checker.updateModificationTime(classPathEntry.getFile(),
false);
}
}
// Check the dates of the auxiliary input files.
checker.updateInputModificationTime(configuration.applyMapping);
checker.updateInputModificationTime(configuration.obfuscationDictionary);
checker.updateInputModificationTime(configuration.classObfuscationDictionary);
checker.updateInputModificationTime(configuration.packageObfuscationDictionary);
// Check the dates of the auxiliary output files.
checker.updateOutputModificationTime(configuration.printSeeds);
checker.updateOutputModificationTime(configuration.printUsage);
checker.updateOutputModificationTime(configuration.printMapping);
checker.updateOutputModificationTime(configuration.printConfiguration);
checker.updateOutputModificationTime(configuration.dump);
}
catch (IllegalStateException e)
{
// The output is outdated.
return false;
}
System.out.println("The output seems up to date");
return true;
}
/**
* This class maintains the modification times of input and output.
* The methods throw an IllegalStateException if the output appears
* outdated.
*/
private static class ModificationTimeChecker {
private long inputModificationTime = Long.MIN_VALUE;
private long outputModificationTime = Long.MAX_VALUE;
/**
* Updates the input modification time based on the given file or
* directory (recursively).
*/
public void updateInputModificationTime(File file)
{
if (file != null)
{
updateModificationTime(file, false);
}
}
/**
* Updates the input modification time based on the given file or
* directory (recursively).
*/
public void updateOutputModificationTime(File file)
{
if (file != null && file.getName().length() > 0)
{
updateModificationTime(file, true);
}
}
/**
* Updates the specified modification time based on the given file or
* directory (recursively).
*/
public void updateModificationTime(File file, boolean isOutput)
{
// Is it a directory?
if (file.isDirectory())
{
// Ignore the directory's modification time; just recurse on
// its files.
File[] files = file.listFiles();
// Still, an empty output directory is probably a sign that it
// is not up to date.
if (files.length == 0 && isOutput)
{
updateOutputModificationTime(Long.MIN_VALUE);
}
for (int index = 0; index < files.length; index++)
{
updateModificationTime(files[index], isOutput);
}
}
else
{
// Update with the file's modification time.
updateModificationTime(file.lastModified(), isOutput);
}
}
/**
* Updates the specified modification time.
*/
public void updateModificationTime(long time, boolean isOutput)
{
if (isOutput)
{
updateOutputModificationTime(time);
}
else
{
updateInputModificationTime(time);
}
}
/**
* Updates the input modification time.
*/
public void updateInputModificationTime(long time)
{
if (inputModificationTime < time)
{
inputModificationTime = time;
checkModificationTimes();
}
}
/**
* Updates the output modification time.
*/
public void updateOutputModificationTime(long time)
{
if (outputModificationTime > time)
{
outputModificationTime = time;
checkModificationTimes();
}
}
private void checkModificationTimes()
{
if (inputModificationTime > outputModificationTime)
{
throw new IllegalStateException("The output is outdated");
}
}
}
}
|