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: 1739358 $
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}