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.validator.validators;
17
18 import java.math.BigDecimal;
19
20 import org.seasar.cubby.validator.MessageHelper;
21 import org.seasar.cubby.validator.ScalarFieldValidator;
22 import org.seasar.cubby.validator.ValidationContext;
23 import org.seasar.framework.util.StringUtil;
24
25 /**
26 * 数値かどうかを検証します。
27 * <p>
28 * 数値かどうかの検証は {@link BigDecimal#BigDecimal(String)} で行っています。
29 * <p>
30 * デフォルトエラーメッセージキー:valid.number
31 * </p>
32 *
33 * @author agata
34 * @author baba
35 * @see BigDecimal#BigDecimal(String)
36 * @since 1.0.0
37 */
38 public class NumberValidator implements ScalarFieldValidator {
39
40 /**
41 * メッセージヘルパ。
42 */
43 private final MessageHelper messageHelper;
44
45 /**
46 * コンストラクタ
47 */
48 public NumberValidator() {
49 this("valid.number");
50 }
51
52 /**
53 * エラーメッセージキーを指定するコンストラクタ
54 *
55 * @param messageKey
56 * エラーメッセージキー
57 */
58 public NumberValidator(final String messageKey) {
59 this.messageHelper = new MessageHelper(messageKey);
60 }
61
62 /**
63 * {@inheritDoc}
64 */
65 public void validate(final ValidationContext context, final Object value) {
66 if (value instanceof String) {
67 final String str = (String) value;
68 if (StringUtil.isEmpty(str)) {
69 return;
70 }
71 try {
72 new BigDecimal(str);
73 return;
74 } catch (final NumberFormatException e) {
75 }
76 } else if (value == null) {
77 return;
78 }
79 context.addMessageInfo(this.messageHelper.createMessageInfo());
80 }
81
82 }