org.elasticsearch.common.joda.JodaDateMathParser Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of elasticsearch Show documentation
Show all versions of elasticsearch Show documentation
Elasticsearch subproject :server
/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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
*
* http://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.elasticsearch.common.joda;
import org.elasticsearch.ElasticsearchParseException;
import org.elasticsearch.common.time.DateMathParser;
import org.elasticsearch.common.time.DateUtils;
import org.joda.time.DateTimeZone;
import org.joda.time.MutableDateTime;
import org.joda.time.format.DateTimeFormatter;
import java.time.Instant;
import java.time.ZoneId;
import java.util.Objects;
import java.util.function.LongSupplier;
/**
* A parser for date/time formatted text with optional date math.
*
* The format of the datetime is configurable, and unix timestamps can also be used. Datemath
* is appended to a datetime with the following syntax:
* ||[+-/](\d+)?[yMwdhHms].
*/
public class JodaDateMathParser implements DateMathParser {
private final JodaDateFormatter dateTimeFormatter;
public JodaDateMathParser(JodaDateFormatter dateTimeFormatter) {
Objects.requireNonNull(dateTimeFormatter);
this.dateTimeFormatter = dateTimeFormatter;
}
// Note: we take a callable here for the timestamp in order to be able to figure out
// if it has been used. For instance, the request cache does not cache requests that make
// use of `now`.
@Override
public Instant parse(String text, LongSupplier now, boolean roundUp, ZoneId tz) {
final DateTimeZone timeZone = tz == null ? null : DateUtils.zoneIdToDateTimeZone(tz);
long time;
String mathString;
if (text.startsWith("now")) {
try {
time = now.getAsLong();
} catch (Exception e) {
throw new ElasticsearchParseException("could not read the current timestamp", e);
}
mathString = text.substring("now".length());
} else {
int index = text.indexOf("||");
if (index == -1) {
return Instant.ofEpochMilli(parseDateTime(text, timeZone, roundUp));
}
time = parseDateTime(text.substring(0, index), timeZone, false);
mathString = text.substring(index + 2);
}
return Instant.ofEpochMilli(parseMath(mathString, time, roundUp, timeZone));
}
private long parseMath(String mathString, long time, boolean roundUp, DateTimeZone timeZone) throws ElasticsearchParseException {
if (timeZone == null) {
timeZone = DateTimeZone.UTC;
}
MutableDateTime dateTime = new MutableDateTime(time, timeZone);
for (int i = 0; i < mathString.length(); ) {
char c = mathString.charAt(i++);
final boolean round;
final int sign;
if (c == '/') {
round = true;
sign = 1;
} else {
round = false;
if (c == '+') {
sign = 1;
} else if (c == '-') {
sign = -1;
} else {
throw new ElasticsearchParseException("operator not supported for date math [{}]", mathString);
}
}
if (i >= mathString.length()) {
throw new ElasticsearchParseException("truncated date math [{}]", mathString);
}
final int num;
if (!Character.isDigit(mathString.charAt(i))) {
num = 1;
} else {
int numFrom = i;
while (i < mathString.length() && Character.isDigit(mathString.charAt(i))) {
i++;
}
if (i >= mathString.length()) {
throw new ElasticsearchParseException("truncated date math [{}]", mathString);
}
num = Integer.parseInt(mathString.substring(numFrom, i));
}
if (round) {
if (num != 1) {
throw new ElasticsearchParseException("rounding `/` can only be used on single unit types [{}]", mathString);
}
}
char unit = mathString.charAt(i++);
MutableDateTime.Property propertyToRound = null;
switch (unit) {
case 'y':
if (round) {
propertyToRound = dateTime.yearOfCentury();
} else {
dateTime.addYears(sign * num);
}
break;
case 'M':
if (round) {
propertyToRound = dateTime.monthOfYear();
} else {
dateTime.addMonths(sign * num);
}
break;
case 'w':
if (round) {
propertyToRound = dateTime.weekOfWeekyear();
} else {
dateTime.addWeeks(sign * num);
}
break;
case 'd':
if (round) {
propertyToRound = dateTime.dayOfMonth();
} else {
dateTime.addDays(sign * num);
}
break;
case 'h':
case 'H':
if (round) {
propertyToRound = dateTime.hourOfDay();
} else {
dateTime.addHours(sign * num);
}
break;
case 'm':
if (round) {
propertyToRound = dateTime.minuteOfHour();
} else {
dateTime.addMinutes(sign * num);
}
break;
case 's':
if (round) {
propertyToRound = dateTime.secondOfMinute();
} else {
dateTime.addSeconds(sign * num);
}
break;
default:
throw new ElasticsearchParseException("unit [{}] not supported for date math [{}]", unit, mathString);
}
if (propertyToRound != null) {
if (roundUp) {
// we want to go up to the next whole value, even if we are already on a rounded value
propertyToRound.add(1);
propertyToRound.roundFloor();
dateTime.addMillis(-1); // subtract 1 millisecond to get the largest inclusive value
} else {
propertyToRound.roundFloor();
}
}
}
return dateTime.getMillis();
}
private long parseDateTime(String value, DateTimeZone timeZone, boolean roundUpIfNoTime) {
DateTimeFormatter parser = dateTimeFormatter.parser;
if (timeZone != null) {
parser = parser.withZone(timeZone);
}
try {
MutableDateTime date;
// We use 01/01/1970 as a base date so that things keep working with date
// fields that are filled with times without dates
if (roundUpIfNoTime) {
date = new MutableDateTime(1970, 1, 1, 23, 59, 59, 999, DateTimeZone.UTC);
} else {
date = new MutableDateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeZone.UTC);
}
final int end = parser.parseInto(date, value, 0);
if (end < 0) {
int position = ~end;
throw new IllegalArgumentException("Parse failure at index [" + position + "] of [" + value + "]");
} else if (end != value.length()) {
throw new IllegalArgumentException("Unrecognized chars at the end of [" + value + "]: [" + value.substring(end) + "]");
}
return date.getMillis();
} catch (IllegalArgumentException e) {
throw new ElasticsearchParseException("failed to parse date field [{}] with format [{}]", e, value,
dateTimeFormatter.pattern());
}
}
}