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DateTimeValue.java
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DateTimeValue.java
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/*
* Copyright (c) 2002-2018 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.values.storable;
import java.time.Clock;
import java.time.Instant;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.OffsetDateTime;
import java.time.OffsetTime;
import java.time.ZoneId;
import java.time.ZoneOffset;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeFormatterBuilder;
import java.time.temporal.ChronoField;
import java.time.temporal.IsoFields;
import java.time.temporal.TemporalQueries;
import java.time.temporal.TemporalUnit;
import java.util.function.Supplier;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.neo4j.values.AnyValue;
import org.neo4j.values.StructureBuilder;
import org.neo4j.values.ValueMapper;
import org.neo4j.values.virtual.MapValue;
import static java.time.Instant.ofEpochMilli;
import static java.time.Instant.ofEpochSecond;
import static java.time.ZoneOffset.UTC;
import static java.time.ZonedDateTime.ofInstant;
import static java.util.Objects.requireNonNull;
import static org.neo4j.values.storable.DateValue.DATE_PATTERN;
import static org.neo4j.values.storable.DateValue.parseDate;
import static org.neo4j.values.storable.IntegralValue.safeCastIntegral;
import static org.neo4j.values.storable.LocalDateTimeValue.optTime;
import static org.neo4j.values.storable.TimeValue.TIME_PATTERN;
import static org.neo4j.values.storable.TimeValue.parseOffset;
public final class DateTimeValue extends TemporalValue<ZonedDateTime,DateTimeValue>
{
public static DateTimeValue datetime( DateValue date, LocalTimeValue time, ZoneId zone )
{
return new DateTimeValue( ZonedDateTime.of( date.temporal(), time.temporal(), zone ) );
}
public static DateTimeValue datetime( DateValue date, TimeValue time )
{
OffsetTime t = time.temporal();
return new DateTimeValue( ZonedDateTime.of( date.temporal(), t.toLocalTime(), t.getOffset() ) );
}
public static DateTimeValue datetime(
int year, int month, int day, int hour, int minute, int second, int nanoOfSecond, String zone )
{
return datetime( year, month, day, hour, minute, second, nanoOfSecond, parseZoneName( zone ) );
}
public static DateTimeValue datetime(
int year, int month, int day, int hour, int minute, int second, int nanoOfSecond, ZoneId zone )
{
return new DateTimeValue( ZonedDateTime.of( year, month, day, hour, minute, second, nanoOfSecond, zone ) );
}
public static DateTimeValue datetime( long epochSecond, long nano, ZoneOffset zoneOffset )
{
return new DateTimeValue( ofInstant( ofEpochSecond( epochSecond, nano ), zoneOffset ) );
}
public static DateTimeValue datetime( ZonedDateTime datetime )
{
return new DateTimeValue( requireNonNull( datetime, "ZonedDateTime" ) );
}
public static DateTimeValue datetime( OffsetDateTime datetime )
{
return new DateTimeValue( requireNonNull( datetime, "OffsetDateTime" ).toZonedDateTime() );
}
public static DateTimeValue datetime( long epochSecondUTC, long nano, ZoneId zone )
{
return new DateTimeValue( ofInstant( ofEpochSecond( epochSecondUTC, nano ), zone ) );
}
public static DateTimeValue ofEpoch( IntegralValue epochSecondUTC, IntegralValue nano )
{
long ns = safeCastIntegral( "nanosecond", nano, 0 );
if ( ns < 0 || ns >= 1000_000_000 )
{
throw new IllegalArgumentException( "Invalid nanosecond: " + ns );
}
return new DateTimeValue( ofInstant( ofEpochSecond( epochSecondUTC.longValue(), ns ), UTC ) );
}
public static DateTimeValue ofEpochMillis( IntegralValue millisUTC )
{
return new DateTimeValue( ofInstant( ofEpochMilli( millisUTC.longValue() ), UTC ) );
}
public static DateTimeValue parse( CharSequence text, Supplier<ZoneId> defaultZone )
{
return parse( DateTimeValue.class, PATTERN, DateTimeValue::parse, text, defaultZone );
}
public static DateTimeValue parse( TextValue text, Supplier<ZoneId> defaultZone )
{
return parse( DateTimeValue.class, PATTERN, DateTimeValue::parse, text, defaultZone );
}
public static DateTimeValue now( Clock clock )
{
return new DateTimeValue( ZonedDateTime.now( clock ) );
}
public static DateTimeValue now( Clock clock, String timezone )
{
return now( clock.withZone( parseZoneName( timezone ) ) );
}
public static DateTimeValue build( MapValue map, Supplier<ZoneId> defaultZone )
{
return StructureBuilder.build( builder( defaultZone ), map );
}
public static DateTimeValue select( AnyValue from, Supplier<ZoneId> defaultZone )
{
return builder( defaultZone ).selectDateTime( from );
}
public static DateTimeValue truncate(
TemporalUnit unit,
TemporalValue input,
MapValue fields,
Supplier<ZoneId> defaultZone )
{
throw new UnsupportedOperationException( "not implemented" );
}
static DateTimeBuilder<DateTimeValue> builder( Supplier<ZoneId> defaultZone )
{
return new DateTimeBuilder<DateTimeValue>( defaultZone )
{
private final ZonedDateTime defaulZonedDateTime =
ZonedDateTime.of( Field.year.defaultValue, Field.month.defaultValue, Field.day.defaultValue, Field.hour.defaultValue,
Field.minute.defaultValue, Field.second.defaultValue, Field.nanosecond.defaultValue, timezone() );
@Override
public DateTimeValue buildInternal()
{
boolean selectingDate = fields.containsKey( Field.date );
boolean selectingTime = fields.containsKey( Field.time );
boolean selectingDateTime = fields.containsKey( Field.datetime );
ZonedDateTime result;
if ( selectingDateTime )
{
AnyValue dtField = fields.get( Field.datetime );
if ( !(dtField instanceof TemporalValue) )
{
throw new IllegalArgumentException( String.format( "Cannot construct date time from: %s", dtField ) );
}
TemporalValue dt = (TemporalValue) dtField;
OffsetTime timePart = dt.getTimePart( defaultZone );
result = ZonedDateTime.of( dt.getDatePart(), timePart.toLocalTime(), timePart.getOffset() );
}
else if ( selectingTime || selectingDate )
{
OffsetTime time;
if ( selectingTime )
{
AnyValue timeField = fields.get( Field.time );
if ( !(timeField instanceof TemporalValue) )
{
throw new IllegalArgumentException( String.format( "Cannot construct local time from: %s", timeField ) );
}
TemporalValue t = (TemporalValue) timeField;
time = t.getTimePart( defaultZone );
}
else
{
time = TimeValue.defaultTime( timezone() );
}
LocalDate date;
if ( selectingDate )
{
AnyValue dateField = fields.get( Field.date );
if ( !(dateField instanceof TemporalValue) )
{
throw new IllegalArgumentException( String.format( "Cannot construct date from: %s", dateField ) );
}
TemporalValue t = (TemporalValue) dateField;
date = t.getDatePart();
}
else
{
date = DateValue.DEFAULT_CALENDER_DATE;
}
result = ZonedDateTime.of( date, time.toLocalTime(), time.getOffset() );
}
else
{
result = defaulZonedDateTime;
}
if ( fields.containsKey( Field.week ) && !selectingDate && !selectingDateTime )
{
// Be sure to be in the start of the week based year (which can be later than 1st Jan)
result = result
.with( IsoFields.WEEK_BASED_YEAR, safeCastIntegral( Field.year.name(), fields.get( Field.year ),
Field.year.defaultValue ) )
.with( IsoFields.WEEK_OF_WEEK_BASED_YEAR, 1 )
.with( ChronoField.DAY_OF_WEEK, 1 );
}
result = assignAllFields( result );
if ( timezone != null )
{
if ( selectingTime || selectingDateTime )
{
result = result.withZoneSameInstant( timezone() );
}
else
{
result = result.withZoneSameLocal( timezone() );
}
}
return datetime( result );
}
@Override
protected DateTimeValue selectDateTime( AnyValue datetime )
{
if ( datetime instanceof DateTimeValue )
{
DateTimeValue value = (DateTimeValue) datetime;
ZoneId zone = optionalTimezone();
return zone == null ? value : new DateTimeValue(
ZonedDateTime.of( value.temporal().toLocalDateTime(), zone ) );
}
if ( datetime instanceof LocalDateTimeValue )
{
return new DateTimeValue( ZonedDateTime.of(
((LocalDateTimeValue) datetime).temporal(), timezone() ) );
}
throw new IllegalArgumentException( "Cannot select datetime from: " + datetime );
}
};
}
private final ZonedDateTime value;
private DateTimeValue( ZonedDateTime value )
{
this.value = value;
}
@Override
ZonedDateTime temporal()
{
return value;
}
@Override
LocalDate getDatePart()
{
return value.toLocalDate();
}
@Override
LocalTime getLocalTimePart()
{
return value.toLocalTime();
}
@Override
OffsetTime getTimePart( Supplier<ZoneId> defaultZone )
{
ZoneOffset offset = value.getOffset();
LocalTime localTime = value.toLocalTime();
return OffsetTime.of( localTime, offset );
}
@Override
public boolean equals( Value other )
{
if ( other instanceof DateTimeValue )
{
DateTimeValue that = (DateTimeValue) other;
return value.toInstant().equals( that.value.toInstant() );
}
return false;
}
@Override
public <E extends Exception> void writeTo( ValueWriter<E> writer ) throws E
{
Instant instant = value.toInstant();
ZoneId zone = value.getZone();
if ( zone instanceof ZoneOffset )
{
ZoneOffset offset = (ZoneOffset) zone;
writer.writeDateTime( instant.getEpochSecond(), instant.getNano(), offset.getTotalSeconds() );
}
else
{
writer.writeDateTime( instant.getEpochSecond(), instant.getNano(), zone.getId() );
}
}
@Override
int unsafeCompareTo( Value otherValue )
{
DateTimeValue other = (DateTimeValue) otherValue;
return value.compareTo( other.value );
}
@Override
public String prettyPrint()
{
return value.format( DateTimeFormatter.ISO_DATE_TIME );
}
@Override
public ValueGroup valueGroup()
{
return ValueGroup.ZONED_DATE_TIME;
}
@Override
protected int computeHash()
{
return value.toInstant().hashCode();
}
@Override
public <T> T map( ValueMapper<T> mapper )
{
return mapper.mapDateTime( this );
}
@Override
public DateTimeValue add( DurationValue duration )
{
return replacement( value.plus( duration ) );
}
@Override
public DateTimeValue sub( DurationValue duration )
{
return replacement( value.minus( duration ) );
}
@Override
DateTimeValue replacement( ZonedDateTime datetime )
{
return value == datetime ? this : new DateTimeValue( datetime );
}
private static final String ZONE_NAME = "(?<zoneName>[a-zA-Z0-9~._ /+-]+)";
private static final Pattern PATTERN = Pattern.compile(
DATE_PATTERN + "(?<time>T" + TIME_PATTERN + "(?:\\[" + ZONE_NAME + "\\])?" + ")?",
Pattern.CASE_INSENSITIVE );
private static final DateTimeFormatter ZONE_NAME_PARSER = new DateTimeFormatterBuilder()
.parseCaseInsensitive()
.appendZoneRegionId()
.toFormatter();
private static DateTimeValue parse( Matcher matcher, Supplier<ZoneId> defaultZone )
{
LocalDateTime local = LocalDateTime.of( parseDate( matcher ), optTime( matcher ) );
String zoneName = matcher.group( "zoneName" );
ZoneOffset offset = parseOffset( matcher );
ZoneId zone;
if ( zoneName != null )
{
zone = parseZoneName( zoneName );
if ( offset != null )
{
ZoneOffset expected = zone.getRules().getOffset( local );
if ( !expected.equals( offset ) )
{
throw new IllegalArgumentException( "Timezone and offset do not match: " + matcher.group() );
}
}
}
else if ( offset != null )
{
zone = offset;
}
else
{
zone = defaultZone.get();
}
return new DateTimeValue( ZonedDateTime.of( local, zone ) );
}
static ZoneId parseZoneName( String zoneName )
{
return ZONE_NAME_PARSER.parse( zoneName.replace( ' ', '_' ) ).query( TemporalQueries.zoneId() );
}
abstract static class DateTimeBuilder<Result> extends Builder<Result>
{
DateTimeBuilder( Supplier<ZoneId> defaultZone )
{
super( defaultZone );
}
@Override
protected final boolean supportsDate()
{
return true;
}
@Override
protected final boolean supportsTime()
{
return true;
}
protected abstract Result selectDateTime( AnyValue date );
}
}