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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   */
20  package org.apache.mina.util;
21  
22  import java.io.ByteArrayOutputStream;
23  import java.io.OutputStreamWriter;
24  import java.nio.charset.Charset;
25  
26  /**
27   * Utilities for dealing with Charsets.
28   *
29   * @author The Apache Directory Project (mina-dev@directory.apache.org)
30   * @version $Rev: 555855 $
31   */
32  public class CharsetUtil {
33      public static String getDefaultCharsetName() {
34          // Use reflection here to be able to compile mina with jdk 1.4.
35          try {
36              Class charsetClass = Class.forName("java.nio.charset.Charset");
37              Object charSet = charsetClass.getMethod("defaultCharset", null)
38                      .invoke(null, null);
39              return (String) charsetClass.getMethod("name", null).invoke(
40                      charSet, null);
41          } catch (Exception e) {
42              //ignore, not on java 5
43          }
44  
45          // Try to use OutputStreamWriter instead.
46          OutputStreamWriter writer = new OutputStreamWriter(
47                  new ByteArrayOutputStream());
48          return writer.getEncoding();
49      }
50  
51      public static Charset getDefaultCharset() {
52          return Charset.forName(getDefaultCharsetName());
53      }
54  }