Remove APIs marked for removal
See gh-30604
This commit is contained in:
Arjen Poutsma
@@ -1,460 +0,0 @@
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/*
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* Copyright 2002-2022 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.springframework.scheduling.support;
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import java.util.ArrayList;
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import java.util.BitSet;
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import java.util.Calendar;
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import java.util.Collections;
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import java.util.Date;
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import java.util.GregorianCalendar;
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import java.util.List;
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import java.util.TimeZone;
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import org.springframework.lang.Nullable;
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import org.springframework.util.StringUtils;
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/**
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* Date sequence generator for a
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* <a href="https://www.manpagez.com/man/5/crontab/">Crontab pattern</a>,
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* allowing clients to specify a pattern that the sequence matches.
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*
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* <p>The pattern is a list of six single space-separated fields: representing
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* second, minute, hour, day, month, weekday. Month and weekday names can be
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* given as the first three letters of the English names.
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*
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* <p>Example patterns:
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* <ul>
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* <li>"0 0 * * * *" = the top of every hour of every day.</li>
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* <li>"*/10 * * * * *" = every ten seconds.</li>
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* <li>"0 0 8-10 * * *" = 8, 9 and 10 o'clock of every day.</li>
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* <li>"0 0 6,19 * * *" = 6:00 AM and 7:00 PM every day.</li>
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* <li>"0 0/30 8-10 * * *" = 8:00, 8:30, 9:00, 9:30, 10:00 and 10:30 every day.</li>
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* <li>"0 0 9-17 * * MON-FRI" = on the hour nine-to-five weekdays</li>
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* <li>"0 0 0 25 12 ?" = every Christmas Day at midnight</li>
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* </ul>
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*
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* @author Dave Syer
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* @author Juergen Hoeller
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* @author Ruslan Sibgatullin
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* @since 3.0
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* @see CronTrigger
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* @deprecated as of 5.3, in favor of {@link CronExpression}
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*/
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@Deprecated(since = "5.3", forRemoval = true)
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public class CronSequenceGenerator {
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private final String expression;
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@Nullable
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private final TimeZone timeZone;
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private final BitSet months = new BitSet(12);
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private final BitSet daysOfMonth = new BitSet(31);
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private final BitSet daysOfWeek = new BitSet(7);
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private final BitSet hours = new BitSet(24);
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private final BitSet minutes = new BitSet(60);
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private final BitSet seconds = new BitSet(60);
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/**
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* Construct a {@code CronSequenceGenerator} from the pattern provided,
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* using the default {@link TimeZone}.
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* @param expression a space-separated list of time fields
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* @throws IllegalArgumentException if the pattern cannot be parsed
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* @see java.util.TimeZone#getDefault()
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* @deprecated as of 5.3, in favor of {@link CronExpression#parse(String)}
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*/
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@Deprecated(since = "5.3", forRemoval = true)
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public CronSequenceGenerator(String expression) {
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this(expression, TimeZone.getDefault());
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}
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/**
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* Construct a {@code CronSequenceGenerator} from the pattern provided,
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* using the specified {@link TimeZone}.
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* @param expression a space-separated list of time fields
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* @param timeZone the TimeZone to use for generated trigger times
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* @throws IllegalArgumentException if the pattern cannot be parsed
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* @deprecated as of 5.3, in favor of {@link CronExpression#parse(String)}
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*/
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@Deprecated
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public CronSequenceGenerator(String expression, TimeZone timeZone) {
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this.expression = expression;
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this.timeZone = timeZone;
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parse(expression);
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}
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private CronSequenceGenerator(String expression, String[] fields) {
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this.expression = expression;
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this.timeZone = null;
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doParse(fields);
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}
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/**
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* Return the cron pattern that this sequence generator has been built for.
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*/
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String getExpression() {
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return this.expression;
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}
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/**
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* Get the next {@link Date} in the sequence matching the Cron pattern and
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* after the value provided. The return value will have a whole number of
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* seconds, and will be after the input value.
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* @param date a seed value
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* @return the next value matching the pattern
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*/
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public Date next(Date date) {
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/*
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The plan:
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1 Start with whole second (rounding up if necessary)
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2 If seconds match move on, otherwise find the next match:
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2.1 If next match is in the next minute then roll forwards
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3 If minute matches move on, otherwise find the next match
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3.1 If next match is in the next hour then roll forwards
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3.2 Reset the seconds and go to 2
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4 If hour matches move on, otherwise find the next match
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4.1 If next match is in the next day then roll forwards,
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4.2 Reset the minutes and seconds and go to 2
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*/
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Calendar calendar = new GregorianCalendar();
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calendar.setTimeZone(this.timeZone);
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calendar.setTime(date);
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// First, just reset the milliseconds and try to calculate from there...
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calendar.set(Calendar.MILLISECOND, 0);
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long originalTimestamp = calendar.getTimeInMillis();
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doNext(calendar, calendar.get(Calendar.YEAR));
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if (calendar.getTimeInMillis() == originalTimestamp) {
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// We arrived at the original timestamp - round up to the next whole second and try again...
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calendar.add(Calendar.SECOND, 1);
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doNext(calendar, calendar.get(Calendar.YEAR));
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}
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return calendar.getTime();
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}
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private void doNext(Calendar calendar, int dot) {
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List<Integer> resets = new ArrayList<>();
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int second = calendar.get(Calendar.SECOND);
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List<Integer> emptyList = Collections.emptyList();
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int updateSecond = findNext(this.seconds, second, calendar, Calendar.SECOND, Calendar.MINUTE, emptyList);
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if (second == updateSecond) {
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resets.add(Calendar.SECOND);
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}
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int minute = calendar.get(Calendar.MINUTE);
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int updateMinute = findNext(this.minutes, minute, calendar, Calendar.MINUTE, Calendar.HOUR_OF_DAY, resets);
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if (minute == updateMinute) {
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resets.add(Calendar.MINUTE);
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}
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else {
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doNext(calendar, dot);
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}
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int hour = calendar.get(Calendar.HOUR_OF_DAY);
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int updateHour = findNext(this.hours, hour, calendar, Calendar.HOUR_OF_DAY, Calendar.DAY_OF_WEEK, resets);
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if (hour == updateHour) {
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resets.add(Calendar.HOUR_OF_DAY);
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}
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else {
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doNext(calendar, dot);
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}
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int dayOfWeek = calendar.get(Calendar.DAY_OF_WEEK);
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int dayOfMonth = calendar.get(Calendar.DAY_OF_MONTH);
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int updateDayOfMonth = findNextDay(calendar, this.daysOfMonth, dayOfMonth, this.daysOfWeek, dayOfWeek, resets);
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if (dayOfMonth == updateDayOfMonth) {
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resets.add(Calendar.DAY_OF_MONTH);
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}
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else {
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doNext(calendar, dot);
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}
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int month = calendar.get(Calendar.MONTH);
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int updateMonth = findNext(this.months, month, calendar, Calendar.MONTH, Calendar.YEAR, resets);
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if (month != updateMonth) {
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if (calendar.get(Calendar.YEAR) - dot > 4) {
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throw new IllegalArgumentException("Invalid cron expression \"" + this.expression +
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"\" led to runaway search for next trigger");
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}
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doNext(calendar, dot);
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}
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}
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private int findNextDay(Calendar calendar, BitSet daysOfMonth, int dayOfMonth, BitSet daysOfWeek, int dayOfWeek,
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List<Integer> resets) {
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int count = 0;
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int max = 366;
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// the DAY_OF_WEEK values in java.util.Calendar start with 1 (Sunday),
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// but in the cron pattern, they start with 0, so we subtract 1 here
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while ((!daysOfMonth.get(dayOfMonth) || !daysOfWeek.get(dayOfWeek - 1)) && count++ < max) {
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calendar.add(Calendar.DAY_OF_MONTH, 1);
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dayOfMonth = calendar.get(Calendar.DAY_OF_MONTH);
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dayOfWeek = calendar.get(Calendar.DAY_OF_WEEK);
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reset(calendar, resets);
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}
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if (count >= max) {
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throw new IllegalArgumentException("Overflow in day for expression \"" + this.expression + "\"");
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}
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return dayOfMonth;
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}
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/**
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* Search the bits provided for the next set bit after the value provided,
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* and reset the calendar.
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* @param bits a {@link BitSet} representing the allowed values of the field
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* @param value the current value of the field
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* @param calendar the calendar to increment as we move through the bits
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* @param field the field to increment in the calendar (@see
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* {@link Calendar} for the static constants defining valid fields)
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* @param lowerOrders the Calendar field ids that should be reset (i.e. the
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* ones of lower significance than the field of interest)
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* @return the value of the calendar field that is next in the sequence
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*/
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private int findNext(BitSet bits, int value, Calendar calendar, int field, int nextField, List<Integer> lowerOrders) {
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int nextValue = bits.nextSetBit(value);
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// roll over if needed
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if (nextValue == -1) {
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calendar.add(nextField, 1);
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reset(calendar, Collections.singletonList(field));
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nextValue = bits.nextSetBit(0);
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}
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if (nextValue != value) {
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calendar.set(field, nextValue);
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reset(calendar, lowerOrders);
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}
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return nextValue;
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}
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/**
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* Reset the calendar setting all the fields provided to zero.
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*/
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private void reset(Calendar calendar, List<Integer> fields) {
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for (int field : fields) {
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calendar.set(field, field == Calendar.DAY_OF_MONTH ? 1 : 0);
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}
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}
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// Parsing logic invoked by the constructor
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/**
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* Parse the given pattern expression.
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*/
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private void parse(String expression) throws IllegalArgumentException {
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String[] fields = StringUtils.tokenizeToStringArray(expression, " ");
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if (!areValidCronFields(fields)) {
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throw new IllegalArgumentException(String.format(
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"Cron expression must consist of 6 fields (found %d in \"%s\")", fields.length, expression));
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}
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doParse(fields);
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}
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private void doParse(String[] fields) {
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setNumberHits(this.seconds, fields[0], 0, 60);
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setNumberHits(this.minutes, fields[1], 0, 60);
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setNumberHits(this.hours, fields[2], 0, 24);
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setDaysOfMonth(this.daysOfMonth, fields[3]);
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setMonths(this.months, fields[4]);
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setDays(this.daysOfWeek, replaceOrdinals(fields[5], "SUN,MON,TUE,WED,THU,FRI,SAT"), 8);
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if (this.daysOfWeek.get(7)) {
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// Sunday can be represented as 0 or 7
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this.daysOfWeek.set(0);
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this.daysOfWeek.clear(7);
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}
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}
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/**
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* Replace the values in the comma-separated list (case-insensitive)
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* with their index in the list.
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* @return a new String with the values from the list replaced
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*/
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private String replaceOrdinals(String value, String commaSeparatedList) {
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String[] list = StringUtils.commaDelimitedListToStringArray(commaSeparatedList);
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for (int i = 0; i < list.length; i++) {
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String item = list[i].toUpperCase();
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value = StringUtils.replace(value.toUpperCase(), item, "" + i);
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}
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return value;
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}
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private void setDaysOfMonth(BitSet bits, String field) {
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int max = 31;
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// Days of month start with 1 (in Cron and Calendar) so add one
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setDays(bits, field, max + 1);
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// ... and remove it from the front
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bits.clear(0);
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}
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private void setDays(BitSet bits, String field, int max) {
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if (field.contains("?")) {
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field = "*";
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}
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setNumberHits(bits, field, 0, max);
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}
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private void setMonths(BitSet bits, String value) {
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int max = 12;
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value = replaceOrdinals(value, "FOO,JAN,FEB,MAR,APR,MAY,JUN,JUL,AUG,SEP,OCT,NOV,DEC");
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BitSet months = new BitSet(13);
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// Months start with 1 in Cron and 0 in Calendar, so push the values first into a longer bit set
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setNumberHits(months, value, 1, max + 1);
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// ... and then rotate it to the front of the months
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for (int i = 1; i <= max; i++) {
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if (months.get(i)) {
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bits.set(i - 1);
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}
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}
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}
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private void setNumberHits(BitSet bits, String value, int min, int max) {
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String[] fields = StringUtils.delimitedListToStringArray(value, ",");
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for (String field : fields) {
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if (!field.contains("/")) {
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// Not an incrementer so it must be a range (possibly empty)
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int[] range = getRange(field, min, max);
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bits.set(range[0], range[1] + 1);
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}
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else {
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String[] split = StringUtils.delimitedListToStringArray(field, "/");
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if (split.length > 2) {
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throw new IllegalArgumentException("Incrementer has more than two fields: '" +
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field + "' in expression \"" + this.expression + "\"");
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}
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int[] range = getRange(split[0], min, max);
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if (!split[0].contains("-")) {
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range[1] = max - 1;
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}
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int delta = Integer.parseInt(split[1]);
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if (delta <= 0) {
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throw new IllegalArgumentException("Incrementer delta must be 1 or higher: '" +
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field + "' in expression \"" + this.expression + "\"");
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}
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for (int i = range[0]; i <= range[1]; i += delta) {
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bits.set(i);
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}
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}
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}
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}
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private int[] getRange(String field, int min, int max) {
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int[] result = new int[2];
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if (field.contains("*")) {
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result[0] = min;
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result[1] = max - 1;
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return result;
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}
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if (!field.contains("-")) {
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result[0] = result[1] = Integer.parseInt(field);
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}
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else {
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String[] split = StringUtils.delimitedListToStringArray(field, "-");
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if (split.length > 2) {
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throw new IllegalArgumentException("Range has more than two fields: '" +
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field + "' in expression \"" + this.expression + "\"");
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}
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result[0] = Integer.parseInt(split[0]);
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result[1] = Integer.parseInt(split[1]);
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}
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if (result[0] >= max || result[1] >= max) {
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throw new IllegalArgumentException("Range exceeds maximum (" + max + "): '" +
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field + "' in expression \"" + this.expression + "\"");
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}
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if (result[0] < min || result[1] < min) {
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throw new IllegalArgumentException("Range less than minimum (" + min + "): '" +
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field + "' in expression \"" + this.expression + "\"");
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}
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if (result[0] > result[1]) {
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throw new IllegalArgumentException("Invalid inverted range: '" + field +
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"' in expression \"" + this.expression + "\"");
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}
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return result;
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}
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/**
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* Determine whether the specified expression represents a valid cron pattern.
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* @param expression the expression to evaluate
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* @return {@code true} if the given expression is a valid cron expression
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* @since 4.3
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*/
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public static boolean isValidExpression(@Nullable String expression) {
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if (expression == null) {
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return false;
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}
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String[] fields = StringUtils.tokenizeToStringArray(expression, " ");
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if (!areValidCronFields(fields)) {
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return false;
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}
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try {
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new CronSequenceGenerator(expression, fields);
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return true;
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}
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catch (IllegalArgumentException ex) {
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return false;
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}
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}
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private static boolean areValidCronFields(@Nullable String[] fields) {
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return (fields != null && fields.length == 6);
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}
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@Override
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public boolean equals(@Nullable Object other) {
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if (this == other) {
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return true;
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}
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if (!(other instanceof CronSequenceGenerator otherCron)) {
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return false;
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}
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return (this.months.equals(otherCron.months) && this.daysOfMonth.equals(otherCron.daysOfMonth) &&
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this.daysOfWeek.equals(otherCron.daysOfWeek) && this.hours.equals(otherCron.hours) &&
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this.minutes.equals(otherCron.minutes) && this.seconds.equals(otherCron.seconds));
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}
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@Override
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public int hashCode() {
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return (17 * this.months.hashCode() + 29 * this.daysOfMonth.hashCode() + 37 * this.daysOfWeek.hashCode() +
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41 * this.hours.hashCode() + 53 * this.minutes.hashCode() + 61 * this.seconds.hashCode());
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}
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@Override
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public String toString() {
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return getClass().getSimpleName() + ": " + this.expression;
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}
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}
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Reference in New Issue
Block a user