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
|
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package org.apache.tools.ant.util.regexp;
import java.util.Vector;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;
import org.apache.tools.ant.BuildException;
/**
* Implementation of RegexpMatcher for the built-in regexp matcher of
* JDK 1.4. UNIX_LINES option is enabled as a default.
*
*/
public class Jdk14RegexpMatcher implements RegexpMatcher {
private String pattern;
/** Constructor for JakartaOroRegexp */
public Jdk14RegexpMatcher() {
}
/**
* Set the regexp pattern from the String description.
* @param pattern the pattern to match
*/
public void setPattern(String pattern) {
this.pattern = pattern;
}
/**
* Get a String representation of the regexp pattern
* @return the pattern
* @throws BuildException on error
*/
public String getPattern() {
return pattern;
}
/**
* Get a compiled representation of the regexp pattern
* @param options the options
* @return the compiled pattern
* @throws BuildException on error
*/
protected Pattern getCompiledPattern(int options)
throws BuildException {
int cOptions = getCompilerOptions(options);
try {
Pattern p = Pattern.compile(this.pattern, cOptions);
return p;
} catch (PatternSyntaxException e) {
throw new BuildException(e);
}
}
/**
* Does the given argument match the pattern using default options?
* @param argument the string to match against
* @return true if the pattern matches
* @throws BuildException on error
*/
public boolean matches(String argument) throws BuildException {
return matches(argument, MATCH_DEFAULT);
}
/**
* Does the given argument match the pattern?
* @param input the string to match against
* @param options the regex options to use
* @return true if the pattern matches
* @throws BuildException on error
*/
public boolean matches(String input, int options)
throws BuildException {
try {
Pattern p = getCompiledPattern(options);
return p.matcher(input).find();
} catch (Exception e) {
throw new BuildException(e);
}
}
/**
* Returns a Vector of matched groups found in the argument
* using default options.
*
* <p>Group 0 will be the full match, the rest are the
* parenthesized subexpressions</p>.
*
* @param argument the string to match against
* @return the vector of groups
* @throws BuildException on error
*/
public Vector getGroups(String argument) throws BuildException {
return getGroups(argument, MATCH_DEFAULT);
}
/**
* Returns a Vector of matched groups found in the argument.
*
* <p>Group 0 will be the full match, the rest are the
* parenthesized subexpressions</p>.
*
* @param input the string to match against
* @param options the regex options to use
* @return the vector of groups
* @throws BuildException on error
*/
public Vector getGroups(String input, int options)
throws BuildException {
Pattern p = getCompiledPattern(options);
Matcher matcher = p.matcher(input);
if (!matcher.find()) {
return null;
}
Vector v = new Vector();
int cnt = matcher.groupCount();
for (int i = 0; i <= cnt; i++) {
String match = matcher.group(i);
// treat non-matching groups as empty matches
if (match == null) {
match = "";
}
v.addElement(match);
}
return v;
}
/**
* Convert the generic options to the regex compiler specific options.
* @param options the generic options
* @return the specific options
*/
protected int getCompilerOptions(int options) {
// be strict about line separator
int cOptions = Pattern.UNIX_LINES;
if (RegexpUtil.hasFlag(options, MATCH_CASE_INSENSITIVE)) {
cOptions |= Pattern.CASE_INSENSITIVE;
}
if (RegexpUtil.hasFlag(options, MATCH_MULTILINE)) {
cOptions |= Pattern.MULTILINE;
}
if (RegexpUtil.hasFlag(options, MATCH_SINGLELINE)) {
cOptions |= Pattern.DOTALL;
}
return cOptions;
}
}
|
