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.validator.validators;
18
19 import java.util.regex.Pattern;
20
21 import org.seasar.cubby.action.MessageInfo;
22 import org.seasar.cubby.internal.util.StringUtils;
23 import org.seasar.cubby.validator.ScalarFieldValidator;
24 import org.seasar.cubby.validator.ValidationContext;
25
26 /**
27 * 数値であるかを検証します。
28 * <p>
29 * <table>
30 * <caption>検証エラー時に設定するエラーメッセージ</caption> <tbody>
31 * <tr>
32 * <th scope="row">デフォルトのキー</th>
33 * <td>valid.number</td>
34 * </tr>
35 * <tr>
36 * <th scope="row">置換文字列</th>
37 * <td>
38 * <ol start="0">
39 * <li>フィールド名</li>
40 * </ol></td>
41 * </tr>
42 * </tbody>
43 * </table>
44 * </p>
45 *
46 * @author agata
47 * @author baba
48 */
49 public class NumberValidator implements ScalarFieldValidator {
50
51 private static final Pattern NUMBER_PATTERN = Pattern
52 .compile("^[-+]?[0-9]+[.]?[0-9]*$");
53
54 /**
55 * メッセージキー。
56 */
57 private final String messageKey;
58
59 /**
60 * コンストラクタ
61 */
62 public NumberValidator() {
63 this("valid.number");
64 }
65
66 /**
67 * エラーメッセージキーを指定するコンストラクタ
68 *
69 * @param messageKey
70 * エラーメッセージキー
71 */
72 public NumberValidator(final String messageKey) {
73 this.messageKey = messageKey;
74 }
75
76 /**
77 * {@inheritDoc}
78 */
79 public void validate(final ValidationContext context, final Object value) {
80 if (value instanceof String) {
81 final String str = (String) value;
82 if (StringUtils.isEmpty(str)) {
83 return;
84 }
85 if (NUMBER_PATTERN.matcher(str).find()) {
86 return;
87 }
88 } else if (value == null) {
89 return;
90 }
91
92 final MessageInfo messageInfo = new MessageInfo();
93 messageInfo.setKey(this.messageKey);
94 context.addMessageInfo(messageInfo);
95 }
96
97 }