View Javadoc

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.text.DateFormat;
19  import java.text.ParsePosition;
20  import java.text.SimpleDateFormat;
21  import java.util.Date;
22  
23  import org.seasar.cubby.action.FormatPattern;
24  import org.seasar.cubby.controller.CubbyConfiguration;
25  import org.seasar.cubby.controller.ThreadContext;
26  import org.seasar.cubby.validator.MessageHelper;
27  import org.seasar.cubby.validator.ScalarFieldValidator;
28  import org.seasar.cubby.validator.ValidationContext;
29  import org.seasar.framework.exception.SRuntimeException;
30  import org.seasar.framework.util.StringUtil;
31  
32  /**
33   * 日付に対する検証を行います。
34   * <p>
35   * 日付パターンを指定しない場合、「app-cubby.dicon」で指定した日付パターンが使用されます。
36   * </p>
37   * <p>
38   * デフォルトエラーメッセージキー:valid.dateFormat
39   * </p>
40   * 
41   * @author agata
42   * @author baba
43   * @see SimpleDateFormat
44   * @since 1.0.0
45   */
46  public class DateFormatValidator implements ScalarFieldValidator {
47  
48  	/**
49  	 * メッセージヘルパ。
50  	 */
51  	private final MessageHelper messageHelper;
52  
53  	/**
54  	 * 日付パターン
55  	 */
56  	private final String pattern;
57  
58  	/**
59  	 * 日付パターンを指定しないコンストラクタ
60  	 */
61  	public DateFormatValidator() {
62  		this(null);
63  	}
64  
65  	/**
66  	 * 日付パターンを指定するコンストラクタ
67  	 * 
68  	 * @param pattern
69  	 *            日付パターン（例："yyyy/MM/dd"）
70  	 */
71  	public DateFormatValidator(final String pattern) {
72  		this(pattern, "valid.dateFormat");
73  	}
74  
75  	/**
76  	 * 日付パターンとエラーメッセージキーを指定したコンストラクタ
77  	 * 
78  	 * @param pattern
79  	 *            日付パターン（例："yyyy/MM/dd"）
80  	 * @param messageKey
81  	 *            エラーメッセージキー
82  	 */
83  	public DateFormatValidator(final String pattern, final String messageKey) {
84  		this.pattern = pattern;
85  		this.messageHelper = new MessageHelper(messageKey);
86  	}
87  
88  	/**
89  	 * {@inheritDoc}
90  	 */
91  	public void validate(final ValidationContext context, final Object value) {
92  		if (value == null) {
93  			return;
94  		}
95  		if (value instanceof String) {
96  			final String stringValue = (String) value;
97  			if (StringUtil.isEmpty((String) value)) {
98  				return;
99  			}
100 			try {
101 				final DateFormat dateFormat = createDateFormat(context, value);
102 				final ParsePosition parsePosition = new ParsePosition(0);
103 				final Date date = dateFormat.parse(stringValue, parsePosition);
104 				if (date != null
105 						&& parsePosition.getIndex() == stringValue.length()) {
106 					return;
107 				}
108 			} catch (final Exception e) {
109 			}
110 		}
111 
112 		context.addMessageInfo(this.messageHelper.createMessageInfo());
113 	}
114 
115 	private DateFormat createDateFormat(final ValidationContext context,
116 			final Object value) {
117 		final SimpleDateFormat dateFormat = new SimpleDateFormat();
118 		final String pattern;
119 		if (StringUtil.isEmpty(this.pattern)) {
120 			final CubbyConfiguration configuration = ThreadContext
121 					.getConfiguration();
122 			final FormatPattern formatPattern = configuration
123 					.getFormatPattern();
124 			if (formatPattern == null) {
125 				throw new SRuntimeException("ECUB0301", new Object[] { this,
126 						value });
127 			}
128 			pattern = formatPattern.getDatePattern();
129 		} else {
130 			pattern = this.pattern;
131 		}
132 		dateFormat.applyPattern(pattern);
133 		dateFormat.setLenient(false);
134 		return dateFormat;
135 	}
136 
137 }