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Java > Open Source Codes > net > sf > retrotranslator > transformer > SourceMask


1 /***
2  * Retrotranslator: a Java bytecode transformer that translates Java classes
3  * compiled with JDK 5.0 into classes that can be run on JVM 1.4.
4  *
5  * Copyright (c) 2005 - 2007 Taras Puchko
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  * notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  * notice, this list of conditions and the following disclaimer in the
15  * documentation and/or other materials provided with the distribution.
16  * 3. Neither the name of the copyright holders nor the names of its
17  * contributors may be used to endorse or promote products derived from
18  * this software without specific prior written permission.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
24  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
30  * THE POSSIBILITY OF SUCH DAMAGE.
31  */

32 package net.sf.retrotranslator.transformer;
33
34 import java.util.StringTokenizer JavaDoc;
35 import java.util.regex.Pattern JavaDoc;
36 import net.sf.retrotranslator.runtime.impl.RuntimeTools;
37
38 /**
39  * @author Taras Puchko
40  */

41 class SourceMask {
42
43     private Pattern JavaDoc pattern;
44
45     public SourceMask(String JavaDoc srcmask) {
46         if (srcmask == null) {
47             pattern = null;
48             return;
49         }
50         StringBuilder JavaDoc builder = new StringBuilder JavaDoc();
51         for (String JavaDoc s : srcmask.split(";")) {
52             if (builder.length() > 0) builder.append('|');
53             builder.append("((./)?");
54             StringTokenizer JavaDoc tokenizer = new StringTokenizer JavaDoc(s, "*?", true);
55             while (tokenizer.hasMoreTokens()) {
56                 builder.append(wildcardToRegex(tokenizer.nextToken()));
57             }
58             builder.append(")");
59         }
60         pattern = Pattern.compile(builder.toString());
61     }
62
63     private static String JavaDoc wildcardToRegex(String JavaDoc s) {
64         if (s.equals("*")) return ".*";
65         if (s.equals("?")) return ".";
66         return Pattern.quote(s);
67     }
68
69     public boolean matches(String JavaDoc name) {
70         return pattern != null ? pattern.matcher(name).matches() : name.endsWith(RuntimeTools.CLASS_EXTENSION);
71     }
72
73 }
74
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