View Javadoc

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.integration.beans;
21  
22  import java.beans.PropertyEditor;
23  import java.util.regex.Pattern;
24  
25  /**
26   * A {@link PropertyEditor} which converts a {@link String} into
27   * a {@link Character} and vice versa.
28   *
29   * @author The Apache MINA Project (dev@mina.apache.org)
30   * @version $Revision: 606107 $, $Date: 2007-12-21 07:01:28 +0100 (ven, 21 déc 2007) $
31   */
32  public class CharacterEditor extends AbstractPropertyEditor {
33      private static final Pattern UNICODE = Pattern.compile("\\\\[uU][0-9a-fA-F]+");
34      
35      @Override
36      protected String toText(Object value) {
37          return String.valueOf(value);
38      }
39  
40      @Override
41      protected Object toValue(String text) throws IllegalArgumentException {
42          if (text.length() == 0) {
43              return Character.valueOf(Character.MIN_VALUE);
44          }
45          
46          if (UNICODE.matcher(text).matches()) {
47              return Character.valueOf((char) Integer.parseInt(text.substring(2)));
48          }
49          
50          if (text.length() != 1) {
51              throw new IllegalArgumentException("Too many characters: " + text);
52          }
53  
54          return Character.valueOf(text.charAt(0));
55      }
56  }