DateValidator.java
- /*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- *
- * https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- package org.apache.commons.validator.routines;
- import java.text.DateFormat;
- import java.text.Format;
- import java.util.Calendar;
- import java.util.Date;
- import java.util.Locale;
- import java.util.TimeZone;
- /**
- * <p><strong>Date Validation</strong> and Conversion routines ({@code java.util.Date}).</p>
- *
- * <p>This validator provides a number of methods for validating/converting
- * a {@link String} date value to a {@code java.util.Date} using
- * {@link DateFormat} to parse either:</p>
- * <ul>
- * <li>using the default format for the default {@link Locale}</li>
- * <li>using a specified pattern with the default {@link Locale}</li>
- * <li>using the default format for a specified {@link Locale}</li>
- * <li>using a specified pattern with a specified {@link Locale}</li>
- * </ul>
- *
- * <p>For each of the above mechanisms, conversion method (that is, the
- * {@code validate} methods) implementations are provided which
- * either use the default {@code TimeZone} or allow the
- * {@code TimeZone} to be specified.</p>
- *
- * <p>Use one of the {@code isValid()} methods to just validate or
- * one of the {@code validate()} methods to validate and receive a
- * <em>converted</em> {@code Date} value.</p>
- *
- * <p>Implementations of the {@code validate()} method are provided
- * to create {@code Date} objects for different <em>time zones</em>
- * if the system default is not appropriate.</p>
- *
- * <p>Once a value has been successfully converted the following
- * methods can be used to perform various date comparison checks:</p>
- * <ul>
- * <li>{@code compareDates()} compares the day, month and
- * year of two dates, returning 0, -1 or +1 indicating
- * whether the first date is equal, before or after the second.</li>
- * <li>{@code compareWeeks()} compares the week and
- * year of two dates, returning 0, -1 or +1 indicating
- * whether the first week is equal, before or after the second.</li>
- * <li>{@code compareMonths()} compares the month and
- * year of two dates, returning 0, -1 or +1 indicating
- * whether the first month is equal, before or after the second.</li>
- * <li>{@code compareQuarters()} compares the quarter and
- * year of two dates, returning 0, -1 or +1 indicating
- * whether the first quarter is equal, before or after the second.</li>
- * <li>{@code compareYears()} compares the
- * year of two dates, returning 0, -1 or +1 indicating
- * whether the first year is equal, before or after the second.</li>
- * </ul>
- *
- * <p>So that the same mechanism used for parsing an <em>input</em> value
- * for validation can be used to format <em>output</em>, corresponding
- * {@code format()} methods are also provided. That is you can
- * format either:</p>
- * <ul>
- * <li>using a specified pattern</li>
- * <li>using the format for a specified {@link Locale}</li>
- * <li>using the format for the <em>default</em> {@link Locale}</li>
- * </ul>
- *
- * @since 1.3.0
- */
- public class DateValidator extends AbstractCalendarValidator {
- private static final long serialVersionUID = -3966328400469953190L;
- private static final DateValidator VALIDATOR = new DateValidator();
- /**
- * Gets the singleton instance of this validator.
- * @return A singleton instance of the DateValidator.
- */
- public static DateValidator getInstance() {
- return VALIDATOR;
- }
- /**
- * Constructs a <em>strict</em> instance with <em>short</em>
- * date style.
- */
- public DateValidator() {
- this(true, DateFormat.SHORT);
- }
- /**
- * Constructs an instance with the specified <em>strict</em>
- * and <em>date style</em> parameters.
- *
- * @param strict {@code true} if strict
- * {@code Format} parsing should be used.
- * @param dateStyle the date style to use for Locale validation.
- */
- public DateValidator(final boolean strict, final int dateStyle) {
- super(strict, dateStyle, -1);
- }
- /**
- * <p>Compare Dates (day, month and year - not time).</p>
- *
- * @param value The {@link Calendar} value to check.
- * @param compare The {@link Calendar} to compare the value to.
- * @param timeZone The Time Zone used to compare the dates, system default if null.
- * @return Zero if the dates are equal, -1 if first
- * date is less than the seconds and +1 if the first
- * date is greater than.
- */
- public int compareDates(final Date value, final Date compare, final TimeZone timeZone) {
- final Calendar calendarValue = getCalendar(value, timeZone);
- final Calendar calendarCompare = getCalendar(compare, timeZone);
- return compare(calendarValue, calendarCompare, Calendar.DATE);
- }
- /**
- * <p>Compare Months (month and year).</p>
- *
- * @param value The {@code Date} value to check.
- * @param compare The {@code Date} to compare the value to.
- * @param timeZone The Time Zone used to compare the dates, system default if null.
- * @return Zero if the months are equal, -1 if first
- * parameter's month is less than the seconds and +1 if the first
- * parameter's month is greater than.
- */
- public int compareMonths(final Date value, final Date compare, final TimeZone timeZone) {
- final Calendar calendarValue = getCalendar(value, timeZone);
- final Calendar calendarCompare = getCalendar(compare, timeZone);
- return compare(calendarValue, calendarCompare, Calendar.MONTH);
- }
- /**
- * <p>Compare Quarters (quarter and year).</p>
- *
- * @param value The {@code Date} value to check.
- * @param compare The {@code Date} to compare the value to.
- * @param timeZone The Time Zone used to compare the dates, system default if null.
- * @return Zero if the months are equal, -1 if first
- * parameter's quarter is less than the seconds and +1 if the first
- * parameter's quarter is greater than.
- */
- public int compareQuarters(final Date value, final Date compare, final TimeZone timeZone) {
- return compareQuarters(value, compare, timeZone, 1);
- }
- /**
- * <p>Compare Quarters (quarter and year).</p>
- *
- * @param value The {@code Date} value to check.
- * @param compare The {@code Date} to compare the value to.
- * @param timeZone The Time Zone used to compare the dates, system default if null.
- * @param monthOfFirstQuarter The month that the first quarter starts.
- * @return Zero if the quarters are equal, -1 if first
- * parameter's quarter is less than the seconds and +1 if the first
- * parameter's quarter is greater than.
- */
- public int compareQuarters(final Date value, final Date compare, final TimeZone timeZone, final int monthOfFirstQuarter) {
- final Calendar calendarValue = getCalendar(value, timeZone);
- final Calendar calendarCompare = getCalendar(compare, timeZone);
- return super.compareQuarters(calendarValue, calendarCompare, monthOfFirstQuarter);
- }
- /**
- * <p>Compare Weeks (week and year).</p>
- *
- * @param value The {@code Date} value to check.
- * @param compare The {@code Date} to compare the value to.
- * @param timeZone The Time Zone used to compare the dates, system default if null.
- * @return Zero if the weeks are equal, -1 if first
- * parameter's week is less than the seconds and +1 if the first
- * parameter's week is greater than.
- */
- public int compareWeeks(final Date value, final Date compare, final TimeZone timeZone) {
- final Calendar calendarValue = getCalendar(value, timeZone);
- final Calendar calendarCompare = getCalendar(compare, timeZone);
- return compare(calendarValue, calendarCompare, Calendar.WEEK_OF_YEAR);
- }
- /**
- * <p>Compare Years.</p>
- *
- * @param value The {@code Date} value to check.
- * @param compare The {@code Date} to compare the value to.
- * @param timeZone The Time Zone used to compare the dates, system default if null.
- * @return Zero if the years are equal, -1 if first
- * parameter's year is less than the seconds and +1 if the first
- * parameter's year is greater than.
- */
- public int compareYears(final Date value, final Date compare, final TimeZone timeZone) {
- final Calendar calendarValue = getCalendar(value, timeZone);
- final Calendar calendarCompare = getCalendar(compare, timeZone);
- return compare(calendarValue, calendarCompare, Calendar.YEAR);
- }
- /**
- * <p>Convert a {@code Date} to a {@link Calendar}.</p>
- *
- * @param value The date value to be converted.
- * @return The converted {@link Calendar}.
- */
- private Calendar getCalendar(final Date value, final TimeZone timeZone) {
- final Calendar calendar;
- if (timeZone != null) {
- calendar = Calendar.getInstance(timeZone);
- } else {
- calendar = Calendar.getInstance();
- }
- calendar.setTime(value);
- return calendar;
- }
- /**
- * <p>Returns the parsed {@code Date} unchanged.</p>
- *
- * @param value The parsed {@code Date} object created.
- * @param formatter The Format used to parse the value with.
- * @return The parsed value converted to a {@link Calendar}.
- */
- @Override
- protected Object processParsedValue(final Object value, final Format formatter) {
- return value;
- }
- /**
- * <p>Validate/convert a {@code Date} using the default
- * {@link Locale} and {@code TimeZone}.
- *
- * @param value The value validation is being performed on.
- * @return The parsed {@code Date} if valid or {@code null}
- * if invalid.
- */
- public Date validate(final String value) {
- return (Date) parse(value, (String) null, (Locale) null, (TimeZone) null);
- }
- /**
- * <p>Validate/convert a {@code Date} using the specified
- * {@link Locale} and default {@code TimeZone}.
- *
- * @param value The value validation is being performed on.
- * @param locale The locale to use for the date format, system default if null.
- * @return The parsed {@code Date} if valid or {@code null} if invalid.
- */
- public Date validate(final String value, final Locale locale) {
- return (Date) parse(value, (String) null, locale, (TimeZone) null);
- }
- /**
- * <p>Validate/convert a {@code Date} using the specified
- * {@link Locale} and {@code TimeZone}.
- *
- * @param value The value validation is being performed on.
- * @param locale The locale to use for the date format, system default if null.
- * @param timeZone The Time Zone used to parse the date, system default if null.
- * @return The parsed {@code Date} if valid or {@code null} if invalid.
- */
- public Date validate(final String value, final Locale locale, final TimeZone timeZone) {
- return (Date) parse(value, (String) null, locale, timeZone);
- }
- /**
- * <p>Validate/convert a {@code Date} using the specified
- * <em>pattern</em> and default {@code TimeZone}.
- *
- * @param value The value validation is being performed on.
- * @param pattern The pattern used to validate the value against, or the
- * default for the {@link Locale} if {@code null}.
- * @return The parsed {@code Date} if valid or {@code null} if invalid.
- */
- public Date validate(final String value, final String pattern) {
- return (Date) parse(value, pattern, (Locale) null, (TimeZone) null);
- }
- /**
- * <p>Validate/convert a {@code Date} using the specified pattern
- * and {@link Locale} and the default {@code TimeZone}.
- *
- * @param value The value validation is being performed on.
- * @param pattern The pattern used to validate the value against, or the
- * default for the {@link Locale} if {@code null}.
- * @param locale The locale to use for the date format, system default if null.
- * @return The parsed {@code Date} if valid or {@code null} if invalid.
- */
- public Date validate(final String value, final String pattern, final Locale locale) {
- return (Date) parse(value, pattern, locale, (TimeZone) null);
- }
- /**
- * <p>Validate/convert a {@code Date} using the specified
- * pattern, and {@link Locale} and {@code TimeZone}.
- *
- * @param value The value validation is being performed on.
- * @param pattern The pattern used to validate the value against, or the
- * default for the {@link Locale} if {@code null}.
- * @param locale The locale to use for the date format, system default if null.
- * @param timeZone The Time Zone used to parse the date, system default if null.
- * @return The parsed {@code Date} if valid or {@code null} if invalid.
- */
- public Date validate(final String value, final String pattern, final Locale locale, final TimeZone timeZone) {
- return (Date) parse(value, pattern, locale, timeZone);
- }
- /**
- * <p>Validate/convert a {@code Date} using the specified
- * <em>pattern</em> and {@code TimeZone}.
- *
- * @param value The value validation is being performed on.
- * @param pattern The pattern used to validate the value against, or the
- * default for the {@link Locale} if {@code null}.
- * @param timeZone The Time Zone used to parse the date, system default if null.
- * @return The parsed {@code Date} if valid or {@code null} if invalid.
- */
- public Date validate(final String value, final String pattern, final TimeZone timeZone) {
- return (Date) parse(value, pattern, (Locale) null, timeZone);
- }
- /**
- * <p>Validate/convert a {@code Date} using the specified
- * {@code TimeZone} and default {@link Locale}.
- *
- * @param value The value validation is being performed on.
- * @param timeZone The Time Zone used to parse the date, system default if null.
- * @return The parsed {@code Date} if valid or {@code null} if invalid.
- */
- public Date validate(final String value, final TimeZone timeZone) {
- return (Date) parse(value, (String) null, (Locale) null, timeZone);
- }
- }