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/*
* 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.joda.time.DateTimeZone;
import org.joda.time.MutableDateTime;
import java.util.concurrent.TimeUnit;
/**
*/
public class DateMathParser {
private final FormatDateTimeFormatter dateTimeFormatter;
private final TimeUnit timeUnit;
public DateMathParser(FormatDateTimeFormatter dateTimeFormatter, TimeUnit timeUnit) {
this.dateTimeFormatter = dateTimeFormatter;
this.timeUnit = timeUnit;
}
public long parse(String text, long now) {
return parse(text, now, false);
}
public long parseRoundCeil(String text, long now) {
return parse(text, now, true);
}
public long parse(String text, long now, boolean roundCeil) {
long time;
String mathString;
if (text.startsWith("now")) {
time = now;
mathString = text.substring("now".length());
} else {
int index = text.indexOf("||");
String parseString;
if (index == -1) {
parseString = text;
mathString = ""; // nothing else
} else {
parseString = text.substring(0, index);
mathString = text.substring(index + 2);
}
if (roundCeil) {
time = parseRoundCeilStringValue(parseString);
} else {
time = parseStringValue(parseString);
}
}
if (mathString.isEmpty()) {
return time;
}
return parseMath(mathString, time, roundCeil);
}
private long parseMath(String mathString, long time, boolean roundUp) throws ElasticsearchParseException {
MutableDateTime dateTime = new MutableDateTime(time, DateTimeZone.UTC);
try {
for (int i = 0; i < mathString.length(); ) {
char c = mathString.charAt(i++);
int type;
if (c == '/') {
type = 0;
} else if (c == '+') {
type = 1;
} else if (c == '-') {
type = 2;
} else {
throw new ElasticsearchParseException("operator not supported for date math [" + mathString + "]");
}
int num;
if (!Character.isDigit(mathString.charAt(i))) {
num = 1;
} else {
int numFrom = i;
while (Character.isDigit(mathString.charAt(i))) {
i++;
}
num = Integer.parseInt(mathString.substring(numFrom, i));
}
if (type == 0) {
// rounding is only allowed on whole numbers
if (num != 1) {
throw new ElasticsearchParseException("rounding `/` can only be used on single unit types [" + mathString + "]");
}
}
char unit = mathString.charAt(i++);
switch (unit) {
case 'y':
if (type == 0) {
if (roundUp) {
dateTime.yearOfCentury().roundCeiling();
} else {
dateTime.yearOfCentury().roundFloor();
}
} else if (type == 1) {
dateTime.addYears(num);
} else if (type == 2) {
dateTime.addYears(-num);
}
break;
case 'M':
if (type == 0) {
if (roundUp) {
dateTime.monthOfYear().roundCeiling();
} else {
dateTime.monthOfYear().roundFloor();
}
} else if (type == 1) {
dateTime.addMonths(num);
} else if (type == 2) {
dateTime.addMonths(-num);
}
break;
case 'w':
if (type == 0) {
if (roundUp) {
dateTime.weekOfWeekyear().roundCeiling();
} else {
dateTime.weekOfWeekyear().roundFloor();
}
} else if (type == 1) {
dateTime.addWeeks(num);
} else if (type == 2) {
dateTime.addWeeks(-num);
}
break;
case 'd':
if (type == 0) {
if (roundUp) {
dateTime.dayOfMonth().roundCeiling();
} else {
dateTime.dayOfMonth().roundFloor();
}
} else if (type == 1) {
dateTime.addDays(num);
} else if (type == 2) {
dateTime.addDays(-num);
}
break;
case 'h':
case 'H':
if (type == 0) {
if (roundUp) {
dateTime.hourOfDay().roundCeiling();
} else {
dateTime.hourOfDay().roundFloor();
}
} else if (type == 1) {
dateTime.addHours(num);
} else if (type == 2) {
dateTime.addHours(-num);
}
break;
case 'm':
if (type == 0) {
if (roundUp) {
dateTime.minuteOfHour().roundCeiling();
} else {
dateTime.minuteOfHour().roundFloor();
}
} else if (type == 1) {
dateTime.addMinutes(num);
} else if (type == 2) {
dateTime.addMinutes(-num);
}
break;
case 's':
if (type == 0) {
if (roundUp) {
dateTime.secondOfMinute().roundCeiling();
} else {
dateTime.secondOfMinute().roundFloor();
}
} else if (type == 1) {
dateTime.addSeconds(num);
} else if (type == 2) {
dateTime.addSeconds(-num);
}
break;
default:
throw new ElasticsearchParseException("unit [" + unit + "] not supported for date math [" + mathString + "]");
}
}
} catch (Exception e) {
if (e instanceof ElasticsearchParseException) {
throw (ElasticsearchParseException) e;
}
throw new ElasticsearchParseException("failed to parse date math [" + mathString + "]");
}
return dateTime.getMillis();
}
private long parseStringValue(String value) {
try {
return dateTimeFormatter.parser().parseMillis(value);
} catch (RuntimeException e) {
try {
long time = Long.parseLong(value);
return timeUnit.toMillis(time);
} catch (NumberFormatException e1) {
throw new ElasticsearchParseException("failed to parse date field [" + value + "], tried both date format [" + dateTimeFormatter.format() + "], and timestamp number", e);
}
}
}
private long parseRoundCeilStringValue(String value) {
try {
// we create a date time for inclusive upper range, we "include" by default the day level data
// so something like 2011-01-01 will include the full first day of 2011.
// we also use 1970-01-01 as the base for it so we can handle searches like 10:12:55 (just time)
// since when we index those, the base is 1970-01-01
MutableDateTime dateTime = new MutableDateTime(1970, 1, 1, 23, 59, 59, 999, DateTimeZone.UTC);
int location = dateTimeFormatter.parser().parseInto(dateTime, value, 0);
// if we parsed all the string value, we are good
if (location == value.length()) {
return dateTime.getMillis();
}
// if we did not manage to parse, or the year is really high year which is unreasonable
// see if its a number
if (location <= 0 || dateTime.getYear() > 5000) {
try {
long time = Long.parseLong(value);
return timeUnit.toMillis(time);
} catch (NumberFormatException e1) {
throw new ElasticsearchParseException("failed to parse date field [" + value + "], tried both date format [" + dateTimeFormatter.format() + "], and timestamp number");
}
}
return dateTime.getMillis();
} catch (RuntimeException e) {
try {
long time = Long.parseLong(value);
return timeUnit.toMillis(time);
} catch (NumberFormatException e1) {
throw new ElasticsearchParseException("failed to parse date field [" + value + "], tried both date format [" + dateTimeFormatter.format() + "], and timestamp number", e);
}
}
}
}
