forked from docker-java/docker-java
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathGoLangFileMatch.java
More file actions
276 lines (257 loc) · 10.3 KB
/
Copy pathGoLangFileMatch.java
File metadata and controls
276 lines (257 loc) · 10.3 KB
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
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
/**
* Copyright (C) 2014 SignalFuse, Inc.
*/
package com.github.dockerjava.core;
import java.io.File;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.regex.Pattern;
import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import com.google.common.util.concurrent.UncheckedExecutionException;
import org.apache.commons.lang.StringUtils;
import com.github.dockerjava.core.exception.GoLangFileMatchException;
/**
* Implementation of golang's file.Match
*
* Match returns true if name matches the shell file name pattern. The pattern syntax is:
*
* <pre>
* pattern:
* { term }
* term:
* '*' matches any sequence of non-Separator characters
* '?' matches any single non-Separator character
* '[' [ '^' ] { character-range } ']'
* character class (must be non-empty)
* c matches character c (c != '*', '?', '\\', '[')
* '\\' c matches character c
*
* character-range:
* c matches character c (c != '\\', '-', ']')
* '\\' c matches character c
* lo '-' hi matches character c for lo <= c <= hi
*
* Match requires pattern to match all of name, not just a substring.
* The only possible returned error is ErrBadPattern, when pattern
* is malformed.
*
* On Windows, escaping is disabled. Instead, '\\' is treated as
AuthConfigTest * path separator.
* </pre>
*
* @author tedo
*
*/
public class GoLangFileMatch {
private GoLangFileMatch() {
}
public static final boolean IS_WINDOWS = File.separatorChar == '\\';
private static final String PATTERN_CHARS_TO_ESCAPE = "\\.[]{}()*+-?^$|";
private static final LoadingCache<String, Pattern> PATTERN_CACHE = CacheBuilder.newBuilder()
.expireAfterAccess(1, TimeUnit.HOURS)
.maximumSize(10_000)
.build(CacheLoader.from(GoLangFileMatch::buildPattern));
public static boolean match(List<String> patterns, File file) {
return !match(patterns, file.getPath()).isEmpty();
}
public static boolean match(String pattern, File file) {
return match(pattern, file.getPath());
}
/**
* Returns the matching patterns for the given string
*/
public static List<String> match(List<String> patterns, String name) {
List<String> matches = new ArrayList<>();
for (String pattern : patterns) {
if (match(pattern, name)) {
matches.add(pattern);
}
}
return matches;
}
public static boolean match(String pattern, String name) {
try {
return PATTERN_CACHE.get(pattern).matcher(name).matches();
} catch (ExecutionException | UncheckedExecutionException e) {
throw new GoLangFileMatchException(e.getCause().getMessage());
}
}
private static Pattern buildPattern(String pattern) {
StringBuilder patternStringBuilder = new StringBuilder("^");
while (!pattern.isEmpty()) {
pattern = appendChunkPattern(patternStringBuilder, pattern);
if (!pattern.isEmpty()) {
patternStringBuilder.append(quote(File.separatorChar));
}
}
patternStringBuilder.append("(").append(quote(File.separatorChar)).append(".*").append(")?");
return Pattern.compile(patternStringBuilder.toString());
}
private static String quote(char separatorChar) {
if (StringUtils.contains(PATTERN_CHARS_TO_ESCAPE, separatorChar)) {
return "\\" + separatorChar;
} else {
return String.valueOf(separatorChar);
}
}
private static String appendChunkPattern(StringBuilder patternStringBuilder, String pattern) {
if (pattern.equals("**") || pattern.startsWith("**" + File.separator)) {
patternStringBuilder.append("(")
.append("[^").append(quote(File.separatorChar)).append("]*")
.append("(")
.append(quote(File.separatorChar)).append("[^").append(quote(File.separatorChar)).append("]*")
.append(")*").append(")?");
return pattern.substring(pattern.length() == 2 ? 2 : 3);
}
boolean inRange = false;
int rangeFrom = 0;
RangeParseState rangeParseState = RangeParseState.CHAR_EXPECTED;
boolean isEsc = false;
int i;
for (i = 0; i < pattern.length(); i++) {
char c = pattern.charAt(i);
switch (c) {
case '/':
if (!inRange) {
if (!IS_WINDOWS && !isEsc) {
// end of chunk
return pattern.substring(i + 1);
} else {
patternStringBuilder.append(quote(c));
}
} else {
rangeParseState = nextStateAfterChar(rangeParseState);
}
isEsc = false;
break;
case '\\':
if (!inRange) {
if (!IS_WINDOWS) {
if (isEsc) {
patternStringBuilder.append(quote(c));
isEsc = false;
} else {
isEsc = true;
}
} else {
// end of chunk
return pattern.substring(i + 1);
}
} else {
if (IS_WINDOWS || isEsc) {
rangeParseState = nextStateAfterChar(rangeParseState);
isEsc = false;
} else {
isEsc = true;
}
}
break;
case '[':
if (!isEsc) {
if (inRange) {
throw new GoLangFileMatchException("[ not expected, closing bracket ] not yet reached");
}
rangeFrom = i;
rangeParseState = RangeParseState.CHAR_EXPECTED;
inRange = true;
} else {
if (!inRange) {
patternStringBuilder.append(c);
} else {
rangeParseState = nextStateAfterChar(rangeParseState);
}
}
isEsc = false;
break;
case ']':
if (!isEsc) {
if (!inRange) {
throw new GoLangFileMatchException("] is not expected, [ was not met");
}
if (rangeParseState == RangeParseState.CHAR_EXPECTED_AFTER_DASH) {
throw new GoLangFileMatchException("Character range not finished");
}
patternStringBuilder.append(pattern.substring(rangeFrom, i + 1));
inRange = false;
} else {
if (!inRange) {
patternStringBuilder.append(c);
} else {
rangeParseState = nextStateAfterChar(rangeParseState);
}
}
isEsc = false;
break;
case '*':
if (!inRange) {
if (!isEsc) {
patternStringBuilder.append("[^").append(quote(File.separatorChar)).append("]*");
} else {
patternStringBuilder.append(quote(c));
}
} else {
rangeParseState = nextStateAfterChar(rangeParseState);
}
isEsc = false;
break;
case '?':
if (!inRange) {
if (!isEsc) {
patternStringBuilder.append("[^").append(quote(File.separatorChar)).append("]");
} else {
patternStringBuilder.append(quote(c));
}
} else {
rangeParseState = nextStateAfterChar(rangeParseState);
}
isEsc = false;
break;
case '-':
if (!inRange) {
patternStringBuilder.append(quote(c));
} else {
if (!isEsc) {
if (rangeParseState != RangeParseState.CHAR_OR_DASH_EXPECTED) {
throw new GoLangFileMatchException("- character not expected");
}
rangeParseState = RangeParseState.CHAR_EXPECTED_AFTER_DASH;
} else {
rangeParseState = nextStateAfterChar(rangeParseState);
}
}
isEsc = false;
break;
default:
if (!inRange) {
patternStringBuilder.append(quote(c));
} else {
rangeParseState = nextStateAfterChar(rangeParseState);
}
isEsc = false;
}
}
if (isEsc) {
throw new GoLangFileMatchException("Escaped character missing");
}
if (inRange) {
throw new GoLangFileMatchException("Character range not finished");
}
return "";
}
private static RangeParseState nextStateAfterChar(RangeParseState currentState) {
if (currentState == RangeParseState.CHAR_EXPECTED_AFTER_DASH) {
return RangeParseState.CHAR_EXPECTED;
} else {
return RangeParseState.CHAR_OR_DASH_EXPECTED;
}
}
private enum RangeParseState {
CHAR_EXPECTED,
CHAR_OR_DASH_EXPECTED,
CHAR_EXPECTED_AFTER_DASH
}
}