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 * https://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 * @since 1.1 032 * @deprecated Use the new DateValidator, CalendarValidator or TimeValidator in the 033 * routines package. This class will be removed in a future release. 034 */ 035@Deprecated 036public class DateValidator { 037 038 /** 039 * Singleton instance of this class. 040 */ 041 private static final DateValidator DATE_VALIDATOR = new DateValidator(); 042 043 /** 044 * Returns the Singleton instance of this validator. 045 * @return A singleton instance of the DateValidator. 046 */ 047 public static DateValidator getInstance() { 048 return DATE_VALIDATOR; 049 } 050 051 /** 052 * Protected constructor for subclasses to use. 053 */ 054 protected DateValidator() { 055 } 056 057 /** 058 * <p>Checks if the field is a valid date. The {@link Locale} is 059 * used with {@link DateFormat}. The setLenient method 060 * is set to {@code false} for all.</p> 061 * 062 * @param value The value validation is being performed on. 063 * @param locale The locale to use for the date format, defaults to the default 064 * system default if null. 065 * @return true if the date is valid. 066 */ 067 public boolean isValid(final String value, final Locale locale) { 068 if (value == null) { 069 return false; 070 } 071 final DateFormat formatter; 072 if (locale != null) { 073 formatter = DateFormat.getDateInstance(DateFormat.SHORT, locale); 074 } else { 075 formatter = DateFormat.getDateInstance(DateFormat.SHORT, Locale.getDefault()); 076 } 077 formatter.setLenient(false); 078 try { 079 formatter.parse(value); 080 } catch (final ParseException e) { 081 return false; 082 } 083 return true; 084 } 085 086 /** 087 * <p>Checks if the field is a valid date. The pattern is used with 088 * {@link SimpleDateFormat}. If strict is true, then the 089 * length will be checked so '2/12/1999' will not pass validation with 090 * the format 'MM/dd/yyyy' because the month isn't two digits. 091 * The setLenient method is set to {@code false} for all.</p> 092 * 093 * @param value The value validation is being performed on. 094 * @param datePattern The pattern passed to {@link SimpleDateFormat}. 095 * @param strict Whether or not to have an exact match of the datePattern. 096 * @return true if the date is valid. 097 */ 098 public boolean isValid(final String value, final String datePattern, final boolean strict) { 099 100 if (value == null 101 || datePattern == null 102 || datePattern.isEmpty()) { 103 104 return false; 105 } 106 107 final SimpleDateFormat formatter = new SimpleDateFormat(datePattern); 108 formatter.setLenient(false); 109 110 try { 111 formatter.parse(value); 112 } catch (final ParseException e) { 113 return false; 114 } 115 116 if (strict && datePattern.length() != value.length()) { 117 return false; 118 } 119 120 return true; 121 } 122 123}