Coverage report

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

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