001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.commons.validator; 018 019import java.text.DateFormat; 020import java.text.ParseException; 021import java.text.SimpleDateFormat; 022import java.util.Locale; 023 024/** 025 * <p>Perform date validations.</p> 026 * <p> 027 * This class is a Singleton; you can retrieve the instance via the 028 * getInstance() method. 029 * </p> 030 * 031 * @version $Revision$ 032 * @since Validator 1.1 033 * @deprecated Use the new DateValidator, CalendarValidator or TimeValidator in the 034 * routines package. This class will be removed in a future release. 035 */ 036@Deprecated 037public class DateValidator { 038 039 /** 040 * Singleton instance of this class. 041 */ 042 private static final DateValidator DATE_VALIDATOR = new DateValidator(); 043 044 /** 045 * Returns the Singleton instance of this validator. 046 * @return A singleton instance of the DateValidator. 047 */ 048 public static DateValidator getInstance() { 049 return DATE_VALIDATOR; 050 } 051 052 /** 053 * Protected constructor for subclasses to use. 054 */ 055 protected DateValidator() { 056 super(); 057 } 058 059 /** 060 * <p>Checks if the field is a valid date. The pattern is used with 061 * <code>java.text.SimpleDateFormat</code>. If strict is true, then the 062 * length will be checked so '2/12/1999' will not pass validation with 063 * the format 'MM/dd/yyyy' because the month isn't two digits. 064 * The setLenient method is set to <code>false</code> for all.</p> 065 * 066 * @param value The value validation is being performed on. 067 * @param datePattern The pattern passed to <code>SimpleDateFormat</code>. 068 * @param strict Whether or not to have an exact match of the datePattern. 069 * @return true if the date is valid. 070 */ 071 public boolean isValid(String value, String datePattern, boolean strict) { 072 073 if (value == null 074 || datePattern == null 075 || datePattern.length() <= 0) { 076 077 return false; 078 } 079 080 SimpleDateFormat formatter = new SimpleDateFormat(datePattern); 081 formatter.setLenient(false); 082 083 try { 084 formatter.parse(value); 085 } catch(ParseException e) { 086 return false; 087 } 088 089 if (strict && (datePattern.length() != value.length())) { 090 return false; 091 } 092 093 return true; 094 } 095 096 /** 097 * <p>Checks if the field is a valid date. The <code>Locale</code> is 098 * used with <code>java.text.DateFormat</code>. The setLenient method 099 * is set to <code>false</code> for all.</p> 100 * 101 * @param value The value validation is being performed on. 102 * @param locale The locale to use for the date format, defaults to the default 103 * system default if null. 104 * @return true if the date is valid. 105 */ 106 public boolean isValid(String value, Locale locale) { 107 108 if (value == null) { 109 return false; 110 } 111 112 DateFormat formatter = null; 113 if (locale != null) { 114 formatter = DateFormat.getDateInstance(DateFormat.SHORT, locale); 115 } else { 116 formatter = 117 DateFormat.getDateInstance( 118 DateFormat.SHORT, 119 Locale.getDefault()); 120 } 121 122 formatter.setLenient(false); 123 124 try { 125 formatter.parse(value); 126 } catch(ParseException e) { 127 return false; 128 } 129 130 return true; 131 } 132 133}