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 * {@link Boolean}への変換を行うコンバータです。
23 * <p>
24 * 変換元オブジェクトの文字列表現が<code>yes</code>、<code>y</code>、<code>true</code>、
25 * <code>on</code>、<code>1</code>なら<code>true</code>、 そうでなければ<code>false</code>
26 * とします。
27 * </p>
28 *
29 * @author baba
30 */
31 public class BooleanConverter extends AbstractConverter {
32
33 /** <code>true</code>に評価する文字列の配列です。 */
34 private static final String[] TRUE_STRINGS = new String[] { "yes", "y",
35 "true", "on", "1", };
36
37 /**
38 * {@inheritDoc}
39 */
40 public Class<?> getObjectType() {
41 return Boolean.class;
42 }
43
44 /**
45 * {@inheritDoc}
46 */
47 public Object convertToObject(final Object value,
48 final Class<?> objectType, final ConversionHelper helper) {
49 if (value == null) {
50 return null;
51 }
52 return toBoolean(value.toString());
53 }
54
55 /**
56 * 文字列を{@link Boolean}に変換して返します。
57 *
58 * @param value
59 * 変換元の文字列表現
60 * @return 変換した結果の{@link Boolean}
61 */
62 protected Object toBoolean(final String value) {
63 for (final String trueString : TRUE_STRINGS) {
64 if (trueString.equalsIgnoreCase(value)) {
65 return Boolean.TRUE;
66 }
67 }
68 return Boolean.FALSE;
69 }
70
71 /**
72 * {@inheritDoc}
73 */
74 public String convertToString(final Object value,
75 final ConversionHelper helper) {
76 if (value == null) {
77 return null;
78 }
79 return value.toString();
80 }
81
82 }