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
|
//
// ========================================================================
// Copyright (c) 1995-2015 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.webapp;
import java.util.ArrayList;
import java.util.List;
import java.util.StringTokenizer;
/* ------------------------------------------------------------ */
/**
* ClasspathPattern performs sequential pattern matching of a class name
* against an internal array of classpath pattern entries.
*
* When an entry starts with '-' (minus), reverse matching is performed.
* When an entry ends with '.' (period), prefix matching is performed.
*
* When class is initialized from a classpath pattern string, entries
* in this string should be separated by ':' (semicolon) or ',' (comma).
*/
public class ClasspathPattern
{
private static class Entry
{
public String classpath = null;
public boolean result = false;
public boolean partial = false;
}
final private List<String> _patterns = new ArrayList<String>();
final private List<Entry> _entries = new ArrayList<Entry>();
/* ------------------------------------------------------------ */
public ClasspathPattern()
{
}
/* ------------------------------------------------------------ */
public ClasspathPattern(String[] patterns)
{
setPatterns(patterns);
}
/* ------------------------------------------------------------ */
public ClasspathPattern(String pattern)
{
setPattern(pattern);
}
/* ------------------------------------------------------------ */
/**
* Initialize the matcher by parsing each classpath pattern in an array
*
* @param patterns array of classpath patterns
*/
private void setPatterns(String[] patterns)
{
_patterns.clear();
_entries.clear();
addPatterns(patterns);
}
/* ------------------------------------------------------------ */
/**
* @param patterns array of classpath patterns
*/
private void addPatterns(String[] patterns)
{
if (patterns != null)
{
Entry entry = null;
for (String pattern : patterns)
{
entry = createEntry(pattern);
if (entry != null)
{
_patterns.add(pattern);
_entries.add(entry);
}
}
}
}
/* ------------------------------------------------------------ */
/**
* @param patterns array of classpath patterns
*/
private void prependPatterns(String[] patterns)
{
if (patterns != null)
{
Entry entry = null;
int i=0;
for (String pattern : patterns)
{
entry = createEntry(pattern);
if (entry != null)
{
_patterns.add(i,pattern);
_entries.add(i,entry);
i++;
}
}
}
}
/* ------------------------------------------------------------ */
/**
* Create an entry object containing information about
* a single classpath pattern
*
* @param pattern single classpath pattern
* @return corresponding Entry object
*/
private Entry createEntry(String pattern)
{
Entry entry = null;
if (pattern != null)
{
String item = pattern.trim();
if (item.length() > 0)
{
entry = new Entry();
entry.result = !item.startsWith("-");
entry.partial = item.endsWith(".");
entry.classpath = entry.result ? item : item.substring(1).trim();
}
}
return entry;
}
/* ------------------------------------------------------------ */
/**
* Initialize the matcher by parsing a classpath pattern string
*
* @param pattern classpath pattern string
*/
public void setPattern(String pattern)
{
_patterns.clear();
_entries.clear();
addPattern(pattern);
}
/* ------------------------------------------------------------ */
/**
* Parse a classpath pattern string and appending the result
* to the existing configuration.
*
* @param pattern classpath pattern string
*/
public void addPattern(String pattern)
{
ArrayList<String> patterns = new ArrayList<String>();
StringTokenizer entries = new StringTokenizer(pattern, ":,");
while (entries.hasMoreTokens())
{
patterns.add(entries.nextToken());
}
addPatterns(patterns.toArray(new String[patterns.size()]));
}
/* ------------------------------------------------------------ */
public void prependPattern(String classOrPackage)
{
ArrayList<String> patterns = new ArrayList<String>();
StringTokenizer entries = new StringTokenizer(classOrPackage, ":,");
while (entries.hasMoreTokens())
{
patterns.add(entries.nextToken());
}
prependPatterns(patterns.toArray(new String[patterns.size()]));
}
/* ------------------------------------------------------------ */
/**
* @return array of classpath patterns
*/
public String[] getPatterns()
{
String[] patterns = null;
if (_patterns!=null && _patterns.size() > 0)
{
patterns = _patterns.toArray(new String[_patterns.size()]);
}
return patterns;
}
/* ------------------------------------------------------------ */
/**
* Match the class name against the pattern
*
* @param name name of the class to match
* @return true if class matches the pattern
*/
public boolean match(String name)
{
boolean result=false;
if (_entries != null)
{
name = name.replace('/','.');
int startIndex = 0;
while(startIndex < name.length() && name.charAt(startIndex) == '.') {
startIndex++;
}
int dollar = name.indexOf("$");
int endIndex = dollar != -1 ? dollar : name.length();
for (Entry entry : _entries)
{
if (entry != null)
{
if (entry.partial)
{
if (name.regionMatches(startIndex, entry.classpath, 0, entry.classpath.length()))
{
result = entry.result;
break;
}
}
else
{
int regionLength = endIndex-startIndex;
if (regionLength == entry.classpath.length()
&& name.regionMatches(startIndex, entry.classpath, 0, regionLength))
{
result = entry.result;
break;
}
}
}
}
}
return result;
}
}
|
