1 /*
2 * Copyright 2004-2010 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
17 package org.seasar.cubby.converter.impl;
18
19 import org.seasar.cubby.converter.ConversionHelper;
20
21 /**
22 * 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。
23 * <p>
24 * 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 <code>null</code>
25 * とします。
26 * </p>
27 *
28 * @author baba
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,
43 final Class<?> objectType, final ConversionHelper helper) {
44 if (value == null) {
45 return null;
46 }
47 return toCharacter(value.toString());
48 }
49
50 /**
51 * 文字列を{@link Character}に変換します。
52 *
53 * @param value
54 * 文字列
55 * @return 文字列を変換した{@link Character}
56 */
57 protected Object toCharacter(final String value) {
58 if (value == null || value.length() == 0) {
59 return 0;
60 }
61 return value.charAt(0);
62 }
63
64 /**
65 * {@inheritDoc}
66 */
67 public String convertToString(final Object value,
68 final ConversionHelper helper) {
69 if (value == null) {
70 return null;
71 }
72 return new String(new char[] { (Character) value });
73 }
74
75 }