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 org.seasar.cubby.validator.MessageHelper;
19 import org.seasar.cubby.validator.ScalarFieldValidator;
20 import org.seasar.cubby.validator.ValidationContext;
21 import org.seasar.framework.util.StringUtil;
22
23 /**
24 * 必須検証します。
25 * <p>
26 * 文字列の長さが0の場合、検証エラーとなります。
27 * </p>
28 * <p>
29 * デフォルトエラーメッセージキー:valid.required
30 * </p>
31 *
32 * @author agata
33 * @author baba
34 */
35 public class RequiredValidator implements ScalarFieldValidator {
36
37 /**
38 * メッセージヘルパ。
39 */
40 private final MessageHelper messageHelper;
41
42 /**
43 * コンストラクタ
44 */
45 public RequiredValidator() {
46 this("valid.required");
47 }
48
49 /**
50 * エラーメッセージキーを指定するコンストラクタ
51 *
52 * @param messageKey
53 * エラーメッセージキー
54 */
55 public RequiredValidator(final String messageKey) {
56 this.messageHelper = new MessageHelper(messageKey);
57 }
58
59 public void validate(final ValidationContext context, final Object value) {
60 if (value instanceof String) {
61 final String str = (String) value;
62 if (!StringUtil.isEmpty(str)) {
63 return;
64 }
65 } else if (value != null) {
66 return;
67 }
68 context.addMessageInfo(this.messageHelper.createMessageInfo());
69 }
70
71 }