/*
* Copyright 2010 Martin Grotzke
*
* 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.DateTime;
import org.joda.time.DateTimeZone;
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 format for joda {@link DateTime}, that stores the millis, chronology and
* time zone as separate attributes. If the chronlogy is {@link ISOChronology},
* the attribute is omitted, thus {@link ISOChronology} is seen as default. If
* the time zone is the default time zone ({@link DateTimeZone#getDefault()}),
* the time zone attribute is omitted. This requires different machines to
* have the same time zone settings.
* <p>
* The following chronologies are supported:
* <ul>
* <li>{@link ISOChronology}</li>
* <li>{@link CopticChronology}</li>
* <li>{@link EthiopicChronology}</li>
* <li>{@link GregorianChronology}</li>
* <li>{@link JulianChronology}</li>
* <li>{@link IslamicChronology}</li>
* <li>{@link BuddhistChronology}</li>
* <li>{@link GJChronology}</li>
* </ul>
* </p>
*
* @author <a href="mailto:martin.grotzke@javakaffee.de">Martin Grotzke</a>
*/
public class JodaDateTimeSerializer extends Serializer<DateTime> {
static final String MILLIS = "millis";
static final String DATE_TIME = "dt";
static final String CHRONOLOGY = "ch";
static final String TIME_ZONE = "tz";
public JodaDateTimeSerializer() {
setImmutable(true);
}
@Override
public DateTime read(final Kryo kryo, final Input input, final Class<DateTime> type) {
final long millis = input.readLong(true);
final Chronology chronology = IdentifiableChronology.readChronology( input );
final DateTimeZone tz = readTimeZone( input );
return new DateTime( millis, chronology.withZone( tz ) );
}
@Override
public void write(final Kryo kryo, final Output output, final DateTime obj) {
output.writeLong(obj.getMillis(), true);
final String chronologyId = IdentifiableChronology.getChronologyId( obj.getChronology() );
output.writeString(chronologyId == null ? "" : chronologyId);
if ( obj.getZone() != null && obj.getZone() != DateTimeZone.getDefault() )
output.writeString(obj.getZone().getID() );
else
output.writeString( "" );
}
private DateTimeZone readTimeZone( final Input input ) {
final String tz = input.readString();
return "".equals( tz ) ? DateTimeZone.getDefault() : DateTimeZone.forID( tz );
}
}