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 * @since 1.0.0
35 */
36 public class RequiredValidator implements ScalarFieldValidator {
37
38 /**
39 * メッセージヘルパ。
40 */
41 private final MessageHelper messageHelper;
42
43 /**
44 * コンストラクタ
45 */
46 public RequiredValidator() {
47 this("valid.required");
48 }
49
50 /**
51 * エラーメッセージキーを指定するコンストラクタ
52 *
53 * @param messageKey
54 * エラーメッセージキー
55 */
56 public RequiredValidator(final String messageKey) {
57 this.messageHelper = new MessageHelper(messageKey);
58 }
59
60 /**
61 * {@inheritDoc}
62 */
63 public void validate(final ValidationContext context, final Object value) {
64 if (value instanceof String) {
65 final String str = (String) value;
66 if (!StringUtil.isEmpty(str)) {
67 return;
68 }
69 } else if (value != null) {
70 return;
71 }
72 context.addMessageInfo(this.messageHelper.createMessageInfo());
73 }
74
75 }