1 /*
2 * Copyright 2004-2008 the Seasar Foundation and the Others.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
13 * either express or implied. See the License for the specific language
14 * governing permissions and limitations under the License.
15 */
16 package org.seasar.cubby.converter.impl;
17
18 import org.seasar.cubby.converter.ConversionHelper;
19
20 /**
21 * 任意のオブジェクトから{@link Character}への変換を行うコンバータです。
22 * <p>
23 * 変換元のオブジェクトの文字列表現の先頭の文字を表す{@link Character}へ変換します。 そうでない場合は
24 * <code>null</code> とします。
25 * </p>
26 *
27 * @author baba
28 * @since 1.1.0
29 */
30 public class CharacterConverter extends AbstractConverter {
31
32 /**
33 * {@inheritDoc}
34 */
35 public Class<?> getObjectType() {
36 return Character.class;
37 }
38
39 /**
40 * {@inheritDoc}
41 */
42 public Object convertToObject(final Object value, final Class<?> objectType, ConversionHelper helper) {
43 if (value == null) {
44 return null;
45 }
46 return toCharacter(value.toString());
47 }
48
49 /**
50 * 文字列を{@link Character}に変換します。
51 *
52 * @param value
53 * 文字列
54 * @return 文字列を変換した{@link Character}
55 */
56 protected Object toCharacter(final String value) {
57 if (value == null || value.length() == 0) {
58 return 0;
59 }
60 return value.charAt(0);
61 }
62
63 /**
64 * {@inheritDoc}
65 */
66 public String convertToString(final Object value, ConversionHelper helper) {
67 if (value == null) {
68 return null;
69 }
70 return new String(new char[] { (Character) value });
71 }
72
73 }