1   /**
2    * Copyright (c) 2000-2008 Liferay, Inc. All rights reserved.
3    *
4    * Permission is hereby granted, free of charge, to any person obtaining a copy
5    * of this software and associated documentation files (the "Software"), to deal
6    * in the Software without restriction, including without limitation the rights
7    * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8    * copies of the Software, and to permit persons to whom the Software is
9    * furnished to do so, subject to the following conditions:
10   *
11   * The above copyright notice and this permission notice shall be included in
12   * all copies or substantial portions of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.portal.kernel.util;
24  
25  import com.liferay.portal.kernel.log.Log;
26  import com.liferay.portal.kernel.log.LogFactoryUtil;
27  
28  /**
29   * <a href="UnicodeFormatter.java.html"><b><i>View Source</i></b></a>
30   *
31   * @author Brian Wing Shun Chan
32   *
33   */
34  public class UnicodeFormatter {
35  
36      public static char HEX_DIGIT[] = {
37          '0', '1', '2', '3', '4', '5', '6', '7',
38          '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'
39      };
40  
41      public static String byteToHex(byte b) {
42          char[] array = {HEX_DIGIT[(b >> 4) & 0x0f], HEX_DIGIT[b & 0x0f]};
43  
44          return new String(array);
45      }
46  
47      public static String charToHex(char c) {
48          byte hi = (byte)(c >>> 8);
49          byte lo = (byte)(c & 0xff);
50  
51          return byteToHex(hi) + byteToHex(lo);
52      }
53  
54      public static String parseString(String hexString) {
55          StringBuilder sb = new StringBuilder();
56  
57          char[] array = hexString.toCharArray();
58  
59          if ((array.length % 6) != 0) {
60              _log.error("String is not in hex format");
61  
62              return hexString;
63          }
64  
65          for (int i = 2; i < hexString.length(); i = i + 6) {
66              String s = hexString.substring(i, i + 4);
67  
68              try {
69                  char c = (char)Integer.parseInt(s, 16);
70  
71                  sb.append(c);
72              }
73              catch (Exception e) {
74                  _log.error(e, e);
75  
76                  return hexString;
77              }
78          }
79  
80          return sb.toString();
81      }
82  
83      public static String toString(char[] array) {
84          StringBuilder sb = new StringBuilder();
85  
86          for (int i = 0; i < array.length; i++) {
87              sb.append("\\u");
88              sb.append(charToHex(array[i]));
89          }
90  
91          return sb.toString();
92      }
93  
94      public static String toString(String s) {
95          if (s == null) {
96              return null;
97          }
98  
99          return toString(s.toCharArray());
100     }
101 
102     private static Log _log = LogFactoryUtil.getLog(UnicodeFormatter.class);
103 
104 }