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/*
* Licensed to ElasticSearch and Shay Banon 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.common.unit.TimeValue;
import org.joda.time.DateTimeConstants;
import org.joda.time.DateTimeField;
import org.joda.time.DateTimeZone;
/**
*/
public abstract class TimeZoneRounding {
public abstract long calc(long utcMillis);
public static Builder builder(DateTimeField field) {
return new Builder(field);
}
public static Builder builder(TimeValue interval) {
return new Builder(interval);
}
public static class Builder {
private DateTimeField field;
private long interval = -1;
private DateTimeZone preTz = DateTimeZone.UTC;
private DateTimeZone postTz = DateTimeZone.UTC;
private float factor = 1.0f;
private long preOffset;
private long postOffset;
private boolean preZoneAdjustLargeInterval = false;
public Builder(DateTimeField field) {
this.field = field;
this.interval = -1;
}
public Builder(TimeValue interval) {
this.field = null;
this.interval = interval.millis();
}
public Builder preZone(DateTimeZone preTz) {
this.preTz = preTz;
return this;
}
public Builder preZoneAdjustLargeInterval(boolean preZoneAdjustLargeInterval) {
this.preZoneAdjustLargeInterval = preZoneAdjustLargeInterval;
return this;
}
public Builder postZone(DateTimeZone postTz) {
this.postTz = postTz;
return this;
}
public Builder preOffset(long preOffset) {
this.preOffset = preOffset;
return this;
}
public Builder postOffset(long postOffset) {
this.postOffset = postOffset;
return this;
}
public Builder factor(float factor) {
this.factor = factor;
return this;
}
public TimeZoneRounding build() {
TimeZoneRounding timeZoneRounding;
if (field != null) {
if (preTz.equals(DateTimeZone.UTC) && postTz.equals(DateTimeZone.UTC)) {
timeZoneRounding = new UTCTimeZoneRoundingFloor(field);
} else if (preZoneAdjustLargeInterval || field.getDurationField().getUnitMillis() < DateTimeConstants.MILLIS_PER_HOUR * 12) {
timeZoneRounding = new TimeTimeZoneRoundingFloor(field, preTz, postTz);
} else {
timeZoneRounding = new DayTimeZoneRoundingFloor(field, preTz, postTz);
}
} else {
if (preTz.equals(DateTimeZone.UTC) && postTz.equals(DateTimeZone.UTC)) {
timeZoneRounding = new UTCIntervalTimeZoneRounding(interval);
} else if (preZoneAdjustLargeInterval || interval < DateTimeConstants.MILLIS_PER_HOUR * 12) {
timeZoneRounding = new TimeIntervalTimeZoneRounding(interval, preTz, postTz);
} else {
timeZoneRounding = new DayIntervalTimeZoneRounding(interval, preTz, postTz);
}
}
if (preOffset != 0 || postOffset != 0) {
timeZoneRounding = new PrePostTimeZoneRounding(timeZoneRounding, preOffset, postOffset);
}
if (factor != 1.0f) {
timeZoneRounding = new FactorTimeZoneRounding(timeZoneRounding, factor);
}
return timeZoneRounding;
}
}
static class TimeTimeZoneRoundingFloor extends TimeZoneRounding {
private final DateTimeField field;
private final DateTimeZone preTz;
private final DateTimeZone postTz;
TimeTimeZoneRoundingFloor(DateTimeField field, DateTimeZone preTz, DateTimeZone postTz) {
this.field = field;
this.preTz = preTz;
this.postTz = postTz;
}
@Override
public long calc(long utcMillis) {
long time = utcMillis + preTz.getOffset(utcMillis);
time = field.roundFloor(time);
// now, time is still in local, move it to UTC (or the adjustLargeInterval flag is set)
time = time - preTz.getOffset(time);
// now apply post Tz
time = time + postTz.getOffset(time);
return time;
}
}
static class UTCTimeZoneRoundingFloor extends TimeZoneRounding {
private final DateTimeField field;
UTCTimeZoneRoundingFloor(DateTimeField field) {
this.field = field;
}
@Override
public long calc(long utcMillis) {
return field.roundFloor(utcMillis);
}
}
static class DayTimeZoneRoundingFloor extends TimeZoneRounding {
private final DateTimeField field;
private final DateTimeZone preTz;
private final DateTimeZone postTz;
DayTimeZoneRoundingFloor(DateTimeField field, DateTimeZone preTz, DateTimeZone postTz) {
this.field = field;
this.preTz = preTz;
this.postTz = postTz;
}
@Override
public long calc(long utcMillis) {
long time = utcMillis + preTz.getOffset(utcMillis);
time = field.roundFloor(time);
// after rounding, since its day level (and above), its actually UTC!
// now apply post Tz
time = time + postTz.getOffset(time);
return time;
}
}
static class UTCIntervalTimeZoneRounding extends TimeZoneRounding {
private final long interval;
UTCIntervalTimeZoneRounding(long interval) {
this.interval = interval;
}
@Override
public long calc(long utcMillis) {
return ((utcMillis / interval) * interval);
}
}
static class TimeIntervalTimeZoneRounding extends TimeZoneRounding {
private final long interval;
private final DateTimeZone preTz;
private final DateTimeZone postTz;
TimeIntervalTimeZoneRounding(long interval, DateTimeZone preTz, DateTimeZone postTz) {
this.interval = interval;
this.preTz = preTz;
this.postTz = postTz;
}
@Override
public long calc(long utcMillis) {
long time = utcMillis + preTz.getOffset(utcMillis);
time = ((time / interval) * interval);
// now, time is still in local, move it to UTC
time = time - preTz.getOffset(time);
// now apply post Tz
time = time + postTz.getOffset(time);
return time;
}
}
static class DayIntervalTimeZoneRounding extends TimeZoneRounding {
private final long interval;
private final DateTimeZone preTz;
private final DateTimeZone postTz;
DayIntervalTimeZoneRounding(long interval, DateTimeZone preTz, DateTimeZone postTz) {
this.interval = interval;
this.preTz = preTz;
this.postTz = postTz;
}
@Override
public long calc(long utcMillis) {
long time = utcMillis + preTz.getOffset(utcMillis);
time = ((time / interval) * interval);
// after rounding, since its day level (and above), its actually UTC!
// now apply post Tz
time = time + postTz.getOffset(time);
return time;
}
}
static class FactorTimeZoneRounding extends TimeZoneRounding {
private final TimeZoneRounding timeZoneRounding;
private final float factor;
FactorTimeZoneRounding(TimeZoneRounding timeZoneRounding, float factor) {
this.timeZoneRounding = timeZoneRounding;
this.factor = factor;
}
@Override
public long calc(long utcMillis) {
return timeZoneRounding.calc((long) (factor * utcMillis));
}
}
static class PrePostTimeZoneRounding extends TimeZoneRounding {
private final TimeZoneRounding timeZoneRounding;
private final long preOffset;
private final long postOffset;
PrePostTimeZoneRounding(TimeZoneRounding timeZoneRounding, long preOffset, long postOffset) {
this.timeZoneRounding = timeZoneRounding;
this.preOffset = preOffset;
this.postOffset = postOffset;
}
@Override
public long calc(long utcMillis) {
return postOffset + timeZoneRounding.calc(utcMillis + preOffset);
}
}
}
