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org.apache.commons.validator.DateValidator |
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1 | /* |
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2 | * Licensed to the Apache Software Foundation (ASF) under one or more |
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3 | * contributor license agreements. See the NOTICE file distributed with |
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4 | * this work for additional information regarding copyright ownership. |
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5 | * The ASF licenses this file to You under the Apache License, Version 2.0 |
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6 | * (the "License"); you may not use this file except in compliance with |
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7 | * the License. You may obtain a copy of the License at |
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8 | * |
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9 | * http://www.apache.org/licenses/LICENSE-2.0 |
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10 | * |
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11 | * Unless required by applicable law or agreed to in writing, software |
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12 | * distributed under the License is distributed on an "AS IS" BASIS, |
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13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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14 | * See the License for the specific language governing permissions and |
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15 | * limitations under the License. |
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16 | */ |
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17 | package org.apache.commons.validator; |
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18 | ||
19 | import java.text.DateFormat; |
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20 | import java.text.ParseException; |
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21 | import java.text.SimpleDateFormat; |
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22 | import java.util.Locale; |
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23 | ||
24 | /** |
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25 | * <p>Perform date validations.</p> |
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26 | * <p> |
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27 | * This class is a Singleton; you can retrieve the instance via the |
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28 | * getInstance() method. |
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29 | * </p> |
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30 | * |
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31 | * @version $Revision: 478334 $ $Date: 2006-11-22 21:31:54 +0000 (Wed, 22 Nov 2006) $ |
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32 | * @since Validator 1.1 |
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33 | */ |
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34 | public class DateValidator { |
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35 | ||
36 | /** |
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37 | * Singleton instance of this class. |
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38 | */ |
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39 | 0 | private static final DateValidator DATE_VALIDATOR = new DateValidator(); |
40 | ||
41 | /** |
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42 | * Returns the Singleton instance of this validator. |
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43 | * @return A singleton instance of the DateValidator. |
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44 | */ |
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45 | public static DateValidator getInstance() { |
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46 | 0 | return DATE_VALIDATOR; |
47 | } |
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48 | ||
49 | /** |
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50 | * Protected constructor for subclasses to use. |
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51 | */ |
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52 | protected DateValidator() { |
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53 | 0 | super(); |
54 | 0 | } |
55 | ||
56 | /** |
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57 | * <p>Checks if the field is a valid date. The pattern is used with |
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58 | * <code>java.text.SimpleDateFormat</code>. If strict is true, then the |
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59 | * length will be checked so '2/12/1999' will not pass validation with |
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60 | * the format 'MM/dd/yyyy' because the month isn't two digits. |
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61 | * The setLenient method is set to <code>false</code> for all.</p> |
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62 | * |
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63 | * @param value The value validation is being performed on. |
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64 | * @param datePattern The pattern passed to <code>SimpleDateFormat</code>. |
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65 | * @param strict Whether or not to have an exact match of the datePattern. |
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66 | * @return true if the date is valid. |
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67 | */ |
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68 | public boolean isValid(String value, String datePattern, class="keyword">boolean strict) { |
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69 | ||
70 | 0 | if (value == null |
71 | || datePattern == null |
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72 | || datePattern.length() <= 0) { |
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73 | ||
74 | 0 | return false; |
75 | } |
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76 | ||
77 | 0 | SimpleDateFormat formatter = new SimpleDateFormat(datePattern); |
78 | 0 | formatter.setLenient(false); |
79 | ||
80 | try { |
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81 | 0 | formatter.parse(value); |
82 | 0 | } catch(ParseException e) { |
83 | 0 | return false; |
84 | } |
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85 | ||
86 | 0 | if (strict && (datePattern.length() != value.length())) { |
87 | 0 | return false; |
88 | } |
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89 | ||
90 | 0 | return true; |
91 | } |
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92 | ||
93 | /** |
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94 | * <p>Checks if the field is a valid date. The <code>Locale</code> is |
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95 | * used with <code>java.text.DateFormat</code>. The setLenient method |
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96 | * is set to <code>false</code> for all.</p> |
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97 | * |
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98 | * @param value The value validation is being performed on. |
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99 | * @param locale The locale to use for the date format, defaults to the default |
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100 | * system default if null. |
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101 | * @return true if the date is valid. |
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102 | */ |
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103 | public boolean isValid(String value, Locale locale) { |
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104 | ||
105 | 0 | if (value == null) { |
106 | 0 | return false; |
107 | } |
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108 | ||
109 | 0 | DateFormat formatter = null; |
110 | 0 | if (locale != null) { |
111 | 0 | formatter = DateFormat.getDateInstance(DateFormat.SHORT, locale); |
112 | } else { |
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113 | 0 | formatter = |
114 | DateFormat.getDateInstance( |
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115 | DateFormat.SHORT, |
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116 | Locale.getDefault()); |
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117 | } |
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118 | ||
119 | 0 | formatter.setLenient(false); |
120 | ||
121 | try { |
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122 | 0 | formatter.parse(value); |
123 | 0 | } catch(ParseException e) { |
124 | 0 | return false; |
125 | } |
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126 | ||
127 | 0 | return true; |
128 | } |
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129 | ||
130 | } |
This report is generated by jcoverage, Maven and Maven JCoverage Plugin. |