de.javakaffee.kryoserializers.jodatime.JodaLocalDateSerializer Maven / Gradle / Ivy
/*
* Copyright 2015 Rennie Petersen
*
* Licensed 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 de.javakaffee.kryoserializers.jodatime;
import org.joda.time.Chronology;
import org.joda.time.LocalDate;
import org.joda.time.chrono.BuddhistChronology;
import org.joda.time.chrono.CopticChronology;
import org.joda.time.chrono.EthiopicChronology;
import org.joda.time.chrono.GJChronology;
import org.joda.time.chrono.GregorianChronology;
import org.joda.time.chrono.ISOChronology;
import org.joda.time.chrono.IslamicChronology;
import org.joda.time.chrono.JulianChronology;
import com.esotericsoftware.kryo.Kryo;
import com.esotericsoftware.kryo.Serializer;
import com.esotericsoftware.kryo.io.Input;
import com.esotericsoftware.kryo.io.Output;
/**
* A Kryo serializer for joda {@link LocalDate}. The LocalDate object is read or written as year,
* month-of-year and day-of-month packed into one integer, and chronology as a separate attribute.
* No time zone is involved. If the chronology is {@link org.joda.time.chrono.ISOChronology} the
* attribute is serialized as an empty string, thus {@link org.joda.time.chrono.ISOChronology} is
* considered to be default.
*
* Note that internally the LocalDate object makes use of an iLocalMillis value, but that field is
* not accessible for reading here because the getLocalMillis() method is protected. There could
* conceivably be cases where a user has created a derived version of LocalDate, and is using the
* iLocalMillis value in some way that this serialization/deserialization will break. (Alternative
* implementation: access the field using Java reflection?)
*
* The following chronologies are supported:
*
* - {@link ISOChronology}
* - {@link CopticChronology}
* - {@link EthiopicChronology}
* - {@link GregorianChronology}
* - {@link JulianChronology}
* - {@link IslamicChronology}
* - {@link BuddhistChronology}
* - {@link GJChronology}
*
*
*
* @author Rennie Petersen
*/
public class JodaLocalDateSerializer extends Serializer {
public JodaLocalDateSerializer() {
setImmutable(true);
}
@Override
public LocalDate read(final Kryo kryo, final Input input, final Class extends LocalDate> type) {
final int packedYearMonthDay = input.readInt(true);
final Chronology chronology = IdentifiableChronology.readChronology(input);
return new LocalDate(packedYearMonthDay / (13 * 32),
(packedYearMonthDay % (13 * 32)) / 32,
packedYearMonthDay % 32,
chronology);
}
@Override
public void write(final Kryo kryo, final Output output, final LocalDate localDate) {
final int packedYearMonthDay = localDate.getYear() * 13 * 32 +
localDate.getMonthOfYear() * 32 +
localDate.getDayOfMonth();
output.writeInt(packedYearMonthDay, true);
final String chronologyId = IdentifiableChronology.getChronologyId(localDate.getChronology());
output.writeString(chronologyId == null ? "" : chronologyId);
}
}