1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.myfaces.shared_orchestra.renderkit.html.util;
20
21
22
23
24 /**
25 * Converts characters outside of latin-1 set in a string to numeric character references.
26 *
27 */
28 public abstract class UnicodeEncoder
29 {
30 /**
31 * Encodes the given string, so that it can be used within a html page.
32 * @param string the string to convert
33 */
34 public static String encode (String string)
35 {
36 if (string == null)
37 {
38 return "";
39 }
40
41 StringBuffer sb = null;
42 char c;
43 for (int i = 0; i < string.length (); ++i)
44 {
45 c = string.charAt(i);
46 if (((int)c) >= 0x80)
47 {
48 if( sb == null ){
49 sb = new StringBuffer( string.length()+4 );
50 sb.append( string.substring(0,i) );
51 }
52 //encode all non basic latin characters
53 sb.append("&#" + ((int)c) + ";");
54 }
55 else if( sb != null )
56 {
57 sb.append(c);
58 }
59 }
60
61 return sb != null ? sb.toString() : string;
62 }
63
64
65 }