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
|
/*
* ProGuard -- shrinking, optimization, obfuscation, and preverification
* of Java bytecode.
*
* Copyright (c) 2002-2013 Eric Lafortune (eric@graphics.cornell.edu)
*
* 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.util;
import proguard.classfile.ClassConstants;
/**
* This StringParser can create StringMatcher instances for regular expressions
* matching internal class names (or descriptors containing class names).
* The regular expressions can contain the following wildcards:
* '%' for a single internal primitive type character (V, Z, B, C, S, I, F,
* J, or D),
* '?' for a single regular class name character,
* '*' for any number of regular class name characters,
* '**' for any number of regular class name characters or package separator
* characters ('/'),
* 'L***;' for a single internal type (class name or primitive type,
* array or non-array), and
* 'L///;' for any number of internal types (class names and primitive
* types).
*
* @author Eric Lafortune
*/
public class ClassNameParser implements StringParser
{
private static final char[] INTERNAL_PRIMITIVE_TYPES = new char[]
{
ClassConstants.INTERNAL_TYPE_VOID,
ClassConstants.INTERNAL_TYPE_BOOLEAN,
ClassConstants.INTERNAL_TYPE_BYTE,
ClassConstants.INTERNAL_TYPE_CHAR,
ClassConstants.INTERNAL_TYPE_SHORT,
ClassConstants.INTERNAL_TYPE_INT,
ClassConstants.INTERNAL_TYPE_LONG,
ClassConstants.INTERNAL_TYPE_FLOAT,
ClassConstants.INTERNAL_TYPE_DOUBLE,
};
// Implementations for StringParser.
public StringMatcher parse(String regularExpression)
{
int index;
StringMatcher nextMatcher = new EmptyStringMatcher();
// Look for wildcards.
for (index = 0; index < regularExpression.length(); index++)
{
// Is there an 'L///;' wildcard?
if (regularExpression.regionMatches(index, "L///;", 0, 5))
{
SettableMatcher settableMatcher = new SettableMatcher();
// Create a matcher, recursively, for the remainder of the
// string, optionally preceded by any type.
nextMatcher =
new OrMatcher(parse(regularExpression.substring(index + 5)),
createAnyTypeMatcher(settableMatcher));
settableMatcher.setMatcher(nextMatcher);
break;
}
// Is there an 'L***;' wildcard?
if (regularExpression.regionMatches(index, "L***;", 0, 5))
{
// Create a matcher for the wildcard and, recursively, for the
// remainder of the string.
nextMatcher =
createAnyTypeMatcher(parse(regularExpression.substring(index + 5)));
break;
}
// Is there a '**' wildcard?
if (regularExpression.regionMatches(index, "**", 0, 2))
{
// Create a matcher for the wildcard and, recursively, for the
// remainder of the string.
nextMatcher =
new VariableStringMatcher(null,
new char[] { ClassConstants.INTERNAL_TYPE_CLASS_END },
0,
Integer.MAX_VALUE,
parse(regularExpression.substring(index + 2)));
break;
}
// Is there a '*' wildcard?
else if (regularExpression.charAt(index) == '*')
{
// Create a matcher for the wildcard and, recursively, for the
// remainder of the string.
nextMatcher =
new VariableStringMatcher(null,
new char[] { ClassConstants.INTERNAL_TYPE_CLASS_END, ClassConstants.INTERNAL_PACKAGE_SEPARATOR },
0,
Integer.MAX_VALUE,
parse(regularExpression.substring(index + 1)));
break;
}
// Is there a '?' wildcard?
else if (regularExpression.charAt(index) == '?')
{
// Create a matcher for the wildcard and, recursively, for the
// remainder of the string.
nextMatcher =
new VariableStringMatcher(null,
new char[] { ClassConstants.INTERNAL_TYPE_CLASS_END, ClassConstants.INTERNAL_PACKAGE_SEPARATOR },
1,
1,
parse(regularExpression.substring(index + 1)));
break;
}
// Is there a '%' wildcard?
else if (regularExpression.charAt(index) == '%')
{
// Create a matcher for the wildcard and, recursively, for the
// remainder of the string.
nextMatcher =
new VariableStringMatcher(INTERNAL_PRIMITIVE_TYPES,
null,
1,
1,
parse(regularExpression.substring(index + 1)));
break;
}
}
// Return a matcher for the fixed first part of the regular expression,
// if any, and the remainder.
return index != 0 ?
(StringMatcher)new FixedStringMatcher(regularExpression.substring(0, index), nextMatcher) :
(StringMatcher)nextMatcher;
}
// Small utility methods.
/**
* Creates a StringMatcher that matches any type (class or primitive type,
* array or non-array) and then the given matcher.
*/
private VariableStringMatcher createAnyTypeMatcher(StringMatcher nextMatcher)
{
return new VariableStringMatcher(new char[] { ClassConstants.INTERNAL_TYPE_ARRAY },
null,
0,
255,
new OrMatcher(
new VariableStringMatcher(INTERNAL_PRIMITIVE_TYPES,
null,
1,
1,
nextMatcher),
new VariableStringMatcher(new char[] { ClassConstants.INTERNAL_TYPE_CLASS_START },
null,
1,
1,
new VariableStringMatcher(null,
new char[] { ClassConstants.INTERNAL_TYPE_CLASS_END },
0,
Integer.MAX_VALUE,
new VariableStringMatcher(new char[] { ClassConstants.INTERNAL_TYPE_CLASS_END },
null,
1,
1,
nextMatcher)))));
}
/**
* A main method for testing class name matching.
*/
public static void main(String[] args)
{
try
{
System.out.println("Regular expression ["+args[0]+"]");
ClassNameParser parser = new ClassNameParser();
StringMatcher matcher = parser.parse(args[0]);
for (int index = 1; index < args.length; index++)
{
String string = args[index];
System.out.print("String ["+string+"]");
System.out.println(" -> match = "+matcher.matches(args[index]));
}
}
catch (Exception ex)
{
ex.printStackTrace();
}
}
}
|
