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Elasticsearch Hadoop Map/Reduce
/*
* 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.hadoop.util;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import javax.xml.bind.DatatypeConverter;
import java.lang.reflect.Method;
import java.sql.Timestamp;
import java.time.Instant;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.time.temporal.ChronoField;
import java.time.temporal.TemporalAccessor;
import java.time.temporal.TemporalField;
import java.time.temporal.TemporalQueries;
import java.util.Calendar;
/**
* Utility used for parsing date ISO8601.
* Morphed into a runtime bridge over possible ISO8601 (simply because the spec is too large, especially when considering the various optional formats).
*/
public abstract class DateUtils {
public static boolean printed = false;
private final static boolean jodaTimeAvailable = ObjectUtils.isClassPresent("org.joda.time.format.ISODateTimeFormat", DateUtils.class.getClassLoader());
static final DateTimeFormatter DATE_OPTIONAL_TIME_OFFSET =
DateTimeFormatter.ofPattern("uuuu-MM-dd['T'HH:mm:ss][.SSSSSSSSS][.SSSSSS][.SSS][XXX]");
private static abstract class Jdk6 {
// Parses ISO date through the JDK XML bind class. However the spec doesn't support all ISO8601 formats which this class tries to address
// in particular Time offsets from UTC are available in 3 forms:
// The offset from UTC is appended to the time in the same way that 'Z' was above, in the form [hh]:[mm], [hh][mm], or [hh].
//
// XML Bind supports only the first one.
public static Calendar parseDate(String value) {
// check for colon in the time offset
int timeZoneIndex = value.indexOf("T");
if (timeZoneIndex > 0) {
int sign = value.indexOf("+", timeZoneIndex);
if (sign < 0) {
sign = value.indexOf("-", timeZoneIndex);
}
// +4 means it's either hh:mm or hhmm
if (sign > 0) {
// +3 points to either : or m
int colonIndex = sign + 3;
// +hh - need to add :mm
if (colonIndex >= value.length()) {
value = value + ":00";
}
else if (value.charAt(colonIndex) != ':') {
value = value.substring(0, colonIndex) + ":" + value.substring(colonIndex);
}
}
}
return DatatypeConverter.parseDateTime(value);
}
}
private static abstract class JodaTime {
private static final Object DATE_OPTIONAL_TIME_FORMATTER;
private static final Method PARSE_DATE_TIME;
private static final Method TO_CALENDAR;
private static final boolean INITIALIZED;
static {
boolean init = false;
Method parseDateTime = null, toCalendar = null;
Object dotf = null;
try {
ClassLoader cl = JodaTime.class.getClassLoader();
Class FORMAT_CLASS = ObjectUtils.loadClass("org.joda.time.format.ISODateTimeFormat", cl);
Method DATE_OPTIONAL_TIME = ReflectionUtils.findMethod(FORMAT_CLASS, "dateOptionalTimeParser");
dotf = ReflectionUtils.invoke(DATE_OPTIONAL_TIME, null);
parseDateTime = ReflectionUtils.findMethod(dotf.getClass(), "parseDateTime", String.class);
Class DATE_TIME_CLASS = ObjectUtils.loadClass("org.joda.time.DateTime", cl);
toCalendar = ReflectionUtils.findMethod(DATE_TIME_CLASS, "toGregorianCalendar");
init = true;
} catch (Exception ex) {
// log exception
}
DATE_OPTIONAL_TIME_FORMATTER = dotf;
PARSE_DATE_TIME = parseDateTime;
TO_CALENDAR = toCalendar;
INITIALIZED = init;
}
public static Calendar parseDate(String value) {
Object dt = ReflectionUtils.invoke(PARSE_DATE_TIME, DATE_OPTIONAL_TIME_FORMATTER, value);
return ReflectionUtils.invoke(TO_CALENDAR, dt);
}
}
public static Calendar parseDate(String value) {
if (!printed) {
printed = true;
Log log = LogFactory.getLog(DateUtils.class);
if (jodaTimeAvailable && JodaTime.INITIALIZED) {
log.info("Joda library available in the classpath; using it for date/time handling...");
}
else {
// be silent otherwise
}
}
return (jodaTimeAvailable && JodaTime.INITIALIZED) ? JodaTime.parseDate(value) : Jdk6.parseDate(value);
}
public static Timestamp parseDateNanos(String value) {
return DATE_OPTIONAL_TIME_OFFSET.parse(value, temporal -> {
int year = temporal.get(ChronoField.YEAR);
int month = temporal.get(ChronoField.MONTH_OF_YEAR);
int dayOfMonth = temporal.get(ChronoField.DAY_OF_MONTH);
int hour = getOrDefault(temporal, ChronoField.HOUR_OF_DAY, 0);
int minute = getOrDefault(temporal, ChronoField.MINUTE_OF_HOUR, 0);
int second = getOrDefault(temporal, ChronoField.SECOND_OF_MINUTE, 0);
int nanoOfSecond = getOrDefault(temporal, ChronoField.NANO_OF_SECOND, 0);
ZoneId zone = temporal.query(TemporalQueries.zone());
if (zone == null) {
zone = ZoneId.of("UTC");
}
ZonedDateTime zonedDateTime = ZonedDateTime.of(year, month, dayOfMonth, hour, minute, second, nanoOfSecond, zone);
return Timestamp.from(Instant.from(zonedDateTime));
});
}
private static int getOrDefault(TemporalAccessor temporal, TemporalField field, int defaultValue) {
if(temporal.isSupported(field)) {
return temporal.get(field);
} else {
return defaultValue;
}
}
}