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c458c05801
The dark lord Gosling designed the Java package naming system so that ownership flows from the DNS system. Since we own the domain name registry.google, it seems only appropriate that we should use google.registry as our package name.
94 lines
3.6 KiB
Java
94 lines
3.6 KiB
Java
// Copyright 2016 The Domain Registry Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package google.registry.model.common;
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import static google.registry.util.DateTimeUtils.isAtOrAfter;
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import static google.registry.util.DateTimeUtils.isBeforeOrAt;
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import com.google.common.base.Splitter;
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import com.googlecode.objectify.annotation.Embed;
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import com.googlecode.objectify.annotation.Index;
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import google.registry.model.ImmutableObject;
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import org.joda.time.DateTime;
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import java.util.List;
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/**
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* A time of year (month, day, millis of day) that can be stored in a sort-friendly format.
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* <p>
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* This is conceptually similar to {@code MonthDay} in Joda or more generally to Joda's
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* {@code Partial}, but the parts we need are too simple to justify a full implementation of
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* {@code Partial}.
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* <p>
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* For simplicity, the native representation of this class's data is its stored format. This allows
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* it to be embeddable with no translation needed and also delays parsing of the string on load
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* until it's actually needed.
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*/
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@Embed
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public class TimeOfYear extends ImmutableObject {
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/**
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* The time as "month day millis" with all fields left-padded with zeroes so that lexographic
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* sorting will do the right thing.
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*/
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@Index
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String timeString;
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/**
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* Constructs a {@link TimeOfYear} from a {@link DateTime}.
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* <p>
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* This handles leap years in an intentionally peculiar way by always treating February 29 as
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* February 28. It is impossible to construct a {@link TimeOfYear} for February 29th.
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*/
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public static TimeOfYear fromDateTime(DateTime dateTime) {
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DateTime nextYear = dateTime.plusYears(1); // This turns February 29 into February 28.
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TimeOfYear instance = new TimeOfYear();
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instance.timeString = String.format(
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"%02d %02d %08d",
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nextYear.getMonthOfYear(),
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nextYear.getDayOfMonth(),
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nextYear.getMillisOfDay());
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return instance;
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}
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/** Get the first {@link DateTime} with this month/day/millis that is at or after the start. */
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public DateTime atOrAfter(DateTime start) {
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DateTime withSameYear = getDateTimeWithSameYear(start);
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return isAtOrAfter(withSameYear, start) ? withSameYear : withSameYear.plusYears(1);
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}
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/** Get the first {@link DateTime} with this month/day/millis that is at or before the end. */
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public DateTime beforeOrAt(DateTime end) {
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DateTime withSameYear = getDateTimeWithSameYear(end);
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return isBeforeOrAt(withSameYear, end) ? withSameYear : withSameYear.minusYears(1);
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}
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/**
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* Return a new datetime with the same year as the parameter but projected to the month, day, and
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* time of day of this object.
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*/
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private DateTime getDateTimeWithSameYear(DateTime date) {
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List<String> monthDayMillis = Splitter.on(' ').splitToList(timeString);
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// Do not be clever and use Ints.stringConverter here. That does radix guessing, and bad things
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// will happen because of the leading zeroes.
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return date
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.withMonthOfYear(Integer.parseInt(monthDayMillis.get(0)))
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.withDayOfMonth(Integer.parseInt(monthDayMillis.get(1)))
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.withMillisOfDay(Integer.parseInt(monthDayMillis.get(2)));
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}
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}
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