/*
* 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.ingest.common;
import org.joda.time.DateTime;
import org.joda.time.DateTimeZone;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;
import org.joda.time.format.ISODateTimeFormat;
import java.util.Locale;
import java.util.function.Function;
enum DateFormat {
Iso8601 {
@Override
Function<String, DateTime> getFunction(String format, DateTimeZone timezone, Locale locale) {
return ISODateTimeFormat.dateTimeParser().withZone(timezone)::parseDateTime;
}
},
Unix {
@Override
Function<String, DateTime> getFunction(String format, DateTimeZone timezone, Locale locale) {
return (date) -> new DateTime((long)(Float.parseFloat(date) * 1000), timezone);
}
},
UnixMs {
@Override
Function<String, DateTime> getFunction(String format, DateTimeZone timezone, Locale locale) {
return (date) -> new DateTime(Long.parseLong(date), timezone);
}
},
Tai64n {
@Override
Function<String, DateTime> getFunction(String format, DateTimeZone timezone, Locale locale) {
return (date) -> new DateTime(parseMillis(date), timezone);
}
private long parseMillis(String date) {
if (date.startsWith("@")) {
date = date.substring(1);
}
long base = Long.parseLong(date.substring(1, 16), 16);
// 1356138046000
long rest = Long.parseLong(date.substring(16, 24), 16);
return ((base * 1000) - 10000) + (rest/1000000);
}
},
Joda {
@Override
Function<String, DateTime> getFunction(String format, DateTimeZone timezone, Locale locale) {
DateTimeFormatter parser = DateTimeFormat.forPattern(format).withZone(timezone).withLocale(locale);
return text -> parser.withDefaultYear((new DateTime(DateTimeZone.UTC)).getYear()).parseDateTime(text);
}
};
abstract Function<String, DateTime> getFunction(String format, DateTimeZone timezone, Locale locale);
static DateFormat fromString(String format) {
switch (format) {
case "ISO8601":
return Iso8601;
case "UNIX":
return Unix;
case "UNIX_MS":
return UnixMs;
case "TAI64N":
return Tai64n;
default:
return Joda;
}
}
}