1 /*
2 * $HeadURL$
3 * $Revision: 1470921 $
4 * $Date: 2013-04-23 12:42:29 +0000 (Tue, 23 Apr 2013) $
5 *
6 * ====================================================================
7 *
8 * Licensed to the Apache Software Foundation (ASF) under one or more
9 * contributor license agreements. See the NOTICE file distributed with
10 * this work for additional information regarding copyright ownership.
11 * The ASF licenses this file to You under the Apache License, Version 2.0
12 * (the "License"); you may not use this file except in compliance with
13 * the License. You may obtain a copy of the License at
14 *
15 * http://www.apache.org/licenses/LICENSE-2.0
16 *
17 * Unless required by applicable law or agreed to in writing, software
18 * distributed under the License is distributed on an "AS IS" BASIS,
19 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
20 * See the License for the specific language governing permissions and
21 * limitations under the License.
22 * ====================================================================
23 *
24 * This software consists of voluntary contributions made by many
25 * individuals on behalf of the Apache Software Foundation. For more
26 * information on the Apache Software Foundation, please see
27 * <http://www.apache.org/>.
28 *
29 */
30
31 package org.apache.http.client.utils;
32
33 import java.lang.reflect.InvocationTargetException;
34 import java.lang.reflect.Method;
35
36 import org.apache.http.annotation.Immutable;
37
38 /**
39 * Uses the java.net.IDN class through reflection.
40 *
41 * @since 4.0
42 */
43 @Immutable
44 public class JdkIdn implements Idn {
45 private final Method toUnicode;
46
47 /**
48 *
49 * @throws ClassNotFoundException if java.net.IDN is not available
50 */
51 public JdkIdn() throws ClassNotFoundException {
52 Class<?> clazz = Class.forName("java.net.IDN");
53 try {
54 toUnicode = clazz.getMethod("toUnicode", String.class);
55 } catch (SecurityException e) {
56 // doesn't happen
57 throw new IllegalStateException(e.getMessage(), e);
58 } catch (NoSuchMethodException e) {
59 // doesn't happen
60 throw new IllegalStateException(e.getMessage(), e);
61 }
62 }
63
64 public String toUnicode(String punycode) {
65 try {
66 return (String) toUnicode.invoke(null, punycode);
67 } catch (IllegalAccessException e) {
68 throw new IllegalStateException(e.getMessage(), e);
69 } catch (InvocationTargetException e) {
70 Throwable t = e.getCause();
71 throw new RuntimeException(t.getMessage(), t);
72 }
73 }
74
75 }