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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   */
45  public class DateFormatValidator implements ScalarFieldValidator {
46  
47  	/**
48  	 * メッセージヘルパ。
49  	 */
50  	private final MessageHelper messageHelper;
51  
52  	/**
53  	 * 日付パターン
54  	 */
55  	private final String pattern;
56  
57  	/**
58  	 * 日付パターンを指定しないコンストラクタ
59  	 */
60  	public DateFormatValidator() {
61  		this(null);
62  	}
63  
64  	/**
65  	 * 日付パターンを指定するコンストラクタ
66  	 * 
67  	 * @param pattern
68  	 *            日付パターン(例:"yyyy/MM/dd")
69  	 */
70  	public DateFormatValidator(final String pattern) {
71  		this(pattern, "valid.dateFormat");
72  	}
73  
74  	/**
75  	 * 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
76  	 * 
77  	 * @param pattern
78  	 *            日付パターン(例:"yyyy/MM/dd")
79  	 * @param messageKey
80  	 *            エラーメッセージキー
81  	 */
82  	public DateFormatValidator(final String pattern, final String messageKey) {
83  		this.pattern = pattern;
84  		this.messageHelper = new MessageHelper(messageKey);
85  	}
86  
87  	public void validate(final ValidationContext context, final Object value) {
88  		if (value == null) {
89  			return;
90  		}
91  		if (value instanceof String) {
92  			final String stringValue = (String) value;
93  			if (StringUtil.isEmpty((String) value)) {
94  				return;
95  			}
96  			try {
97  				final DateFormat dateFormat = createDateFormat(context, value);
98  				final ParsePosition parsePosition = new ParsePosition(0);
99  				final Date date = dateFormat.parse(stringValue, parsePosition);
100 				if (date != null
101 						&& parsePosition.getIndex() == stringValue.length()) {
102 					return;
103 				}
104 			} catch (final Exception e) {
105 			}
106 		}
107 
108 		context.addMessageInfo(this.messageHelper.createMessageInfo());
109 	}
110 
111 	private DateFormat createDateFormat(final ValidationContext context,
112 			final Object value) {
113 		final SimpleDateFormat dateFormat = new SimpleDateFormat();
114 		final String pattern;
115 		if (StringUtil.isEmpty(this.pattern)) {
116 			final CubbyConfiguration configuration = ThreadContext
117 					.getConfiguration();
118 			final FormatPattern formatPattern = configuration
119 					.getFormatPattern();
120 			if (formatPattern == null) {
121 				throw new SRuntimeException("ECUB0301", new Object[] { this,
122 						value });
123 			}
124 			pattern = formatPattern.getDatePattern();
125 		} else {
126 			pattern = this.pattern;
127 		}
128 		dateFormat.applyPattern(pattern);
129 		dateFormat.setLenient(false);
130 		return dateFormat;
131 	}
132 
133 }