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Java > Open Source Codes > org > apache > tapestry > util > text > AsciiCharacterMatcher


1 // Copyright 2004, 2005 The Apache Software Foundation
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 package org.apache.tapestry.util.text;
16
17 /**
18  * An object for matching a set of provided ASCII characters.
19  *
20  * @author mb
21  * @since 4.0
22  */
23 public class AsciiCharacterMatcher implements ICharacterMatcher
24 {
25     private boolean[] _charMap;
26     
27     /**
28      * Create a new ASCII character matcher for identifying the set of provided ASCII characters
29      *
30      * @param chars the character that this matcher should identify
31      */
32     public AsciiCharacterMatcher(String JavaDoc chars) {
33         _charMap = new boolean[128];
34         for (int i = 0; i < chars.length(); i++) {
35             char ch = chars.charAt(i);
36             if (ch > 127)
37                 continue;
38             _charMap[ch] = true;
39         }
40     }
41     
42     /**
43      * Match the characters provided in the constructor
44      *
45      * @see org.apache.tapestry.util.text.ICharacterMatcher#matches(char)
46      */
47     public boolean matches(char ch)
48     {
49         if (ch > 127)
50             return false;
51         return _charMap[ch];
52     }
53 }
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