1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    *
5    *
6    *
7    * The contents of this file are subject to the terms of the Liferay Enterprise
8    * Subscription License ("License"). You may not use this file except in
9    * compliance with the License. You can obtain a copy of the License by
10   * contacting Liferay, Inc. See the License for the specific language governing
11   * permissions and limitations under the License, including but not limited to
12   * distribution rights 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  public class UnicodeFormatter {
34  
35      public static char HEX_DIGIT[] = {
36          '0', '1', '2', '3', '4', '5', '6', '7',
37          '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'
38      };
39  
40      public static String byteToHex(byte b) {
41          char[] array = {HEX_DIGIT[(b >> 4) & 0x0f], HEX_DIGIT[b & 0x0f]};
42  
43          return new String(array);
44      }
45  
46      public static String charToHex(char c) {
47          byte hi = (byte)(c >>> 8);
48          byte lo = (byte)(c & 0xff);
49  
50          char[] array = {
51              HEX_DIGIT[(hi >> 4) & 0x0f], HEX_DIGIT[hi & 0x0f],
52              HEX_DIGIT[(lo >> 4) & 0x0f], HEX_DIGIT[lo & 0x0f]
53          };
54  
55          return new String(array);
56      }
57  
58      public static String parseString(String hexString) {
59          StringBuilder sb = new StringBuilder();
60  
61          char[] array = hexString.toCharArray();
62  
63          if ((array.length % 6) != 0) {
64              _log.error("String is not in hex format");
65  
66              return hexString;
67          }
68  
69          for (int i = 2; i < hexString.length(); i = i + 6) {
70              String s = hexString.substring(i, i + 4);
71  
72              try {
73                  char c = (char)Integer.parseInt(s, 16);
74  
75                  sb.append(c);
76              }
77              catch (Exception e) {
78                  _log.error(e, e);
79  
80                  return hexString;
81              }
82          }
83  
84          return sb.toString();
85      }
86  
87      public static String toString(char[] array) {
88          StringBuilder sb = new StringBuilder();
89  
90          for (int i = 0; i < array.length; i++) {
91              sb.append("\\u");
92              sb.append(charToHex(array[i]));
93          }
94  
95          return sb.toString();
96      }
97  
98      public static String toString(String s) {
99          if (s == null) {
100             return null;
101         }
102 
103         return toString(s.toCharArray());
104     }
105 
106     private static Log _log = LogFactoryUtil.getLog(UnicodeFormatter.class);
107 
108 }