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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.rounding;
import org.elasticsearch.ElasticsearchException;
import org.elasticsearch.common.joda.Joda;
import org.joda.time.DateTimeField;
import org.joda.time.DateTimeZone;
import org.joda.time.chrono.ISOChronology;
/**
*
*/
public enum DateTimeUnit {
WEEK_OF_WEEKYEAR((byte) 1, new FieldFunction() {
@Override
public DateTimeField apply(DateTimeZone tz) {
return ISOChronology.getInstance(tz).weekOfWeekyear();
}
}),
YEAR_OF_CENTURY((byte) 2, new FieldFunction() {
@Override
public DateTimeField apply(DateTimeZone tz) {
return ISOChronology.getInstance(tz).yearOfCentury();
}
}),
QUARTER((byte) 3, new FieldFunction() {
@Override
public DateTimeField apply(DateTimeZone tz) {
return Joda.QuarterOfYear.getField(ISOChronology.getInstance(tz));
}
}),
MONTH_OF_YEAR((byte) 4, new FieldFunction() {
@Override
public DateTimeField apply(DateTimeZone tz) {
return ISOChronology.getInstance(tz).monthOfYear();
}
}),
DAY_OF_MONTH((byte) 5, new FieldFunction() {
@Override
public DateTimeField apply(DateTimeZone tz) {
return ISOChronology.getInstance(tz).dayOfMonth();
}
}),
HOUR_OF_DAY((byte) 6, new FieldFunction() {
@Override
public DateTimeField apply(DateTimeZone tz) {
return ISOChronology.getInstance(tz).hourOfDay();
}
}),
MINUTES_OF_HOUR((byte) 7, new FieldFunction() {
@Override
public DateTimeField apply(DateTimeZone tz) {
return ISOChronology.getInstance(tz).minuteOfHour();
}
}),
SECOND_OF_MINUTE((byte) 8, new FieldFunction() {
@Override
public DateTimeField apply(DateTimeZone tz) {
return ISOChronology.getInstance(tz).secondOfMinute();
}
});
private static abstract class FieldFunction {
abstract DateTimeField apply(DateTimeZone timezone);
}
private final byte id;
private final FieldFunction fieldFunction;
private DateTimeUnit(byte id, FieldFunction fieldFunction) {
this.id = id;
this.fieldFunction = fieldFunction;
}
public byte id() {
return id;
}
/**
* @return the {@link DateTimeField} for the provided {@link DateTimeZone} for this time unit
*/
public DateTimeField field(DateTimeZone tz) {
return fieldFunction.apply(tz);
}
public static DateTimeUnit resolve(byte id) {
switch (id) {
case 1: return WEEK_OF_WEEKYEAR;
case 2: return YEAR_OF_CENTURY;
case 3: return QUARTER;
case 4: return MONTH_OF_YEAR;
case 5: return DAY_OF_MONTH;
case 6: return HOUR_OF_DAY;
case 7: return MINUTES_OF_HOUR;
case 8: return SECOND_OF_MINUTE;
default: throw new ElasticsearchException("Unknown date time unit id [" + id + "]");
}
}
}