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TimeValue.java
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TimeValue.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.LocalTime;
import java.time.OffsetTime;
import java.time.ZoneId;
import java.time.ZoneOffset;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.time.temporal.ChronoField;
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.lang.Integer.parseInt;
import static java.time.ZoneOffset.UTC;
import static java.util.Objects.requireNonNull;
import static org.neo4j.values.storable.DateTimeValue.parseZoneName;
import static org.neo4j.values.storable.DurationValue.SECONDS_PER_DAY;
import static org.neo4j.values.storable.LocalTimeValue.optInt;
import static org.neo4j.values.storable.LocalTimeValue.parseTime;
public final class TimeValue extends TemporalValue<OffsetTime,TimeValue>
{
public static TimeValue time( OffsetTime time )
{
return new TimeValue( requireNonNull( time, "OffsetTime" ) );
}
public static TimeValue time( int hour, int minute, int second, int nanosOfSecond, String offset )
{
return time( hour, minute, second, nanosOfSecond, parseOffset( offset ) );
}
public static TimeValue time( int hour, int minute, int second, int nanosOfSecond, ZoneOffset offset )
{
return new TimeValue(
OffsetTime.of( LocalTime.of( hour, minute, second, nanosOfSecond ), offset ) );
}
public static TimeValue time( long nanosOfDayUTC, ZoneId offset )
{
return new TimeValue( OffsetTime.ofInstant( Instant.ofEpochSecond( 0, nanosOfDayUTC ), offset ) );
}
public static TimeValue parse( CharSequence text, Supplier<ZoneId> defaultZone )
{
return parse( TimeValue.class, PATTERN, TimeValue::parse, text, defaultZone );
}
public static TimeValue parse( TextValue text, Supplier<ZoneId> defaultZone )
{
return parse( TimeValue.class, PATTERN, TimeValue::parse, text, defaultZone );
}
public static TimeValue now( Clock clock )
{
return new TimeValue( OffsetTime.now( clock ) );
}
public static TimeValue now( Clock clock, String timezone )
{
return now( clock.withZone( parseZoneName( timezone ) ) );
}
public static TimeValue build( MapValue map, Supplier<ZoneId> defaultZone )
{
return StructureBuilder.build( builder( defaultZone ), map );
}
public static TimeValue select( AnyValue from, Supplier<ZoneId> defaultZone )
{
return builder( defaultZone ).selectTime( from );
}
public static TimeValue truncate(
TemporalUnit unit,
TemporalValue input,
MapValue fields,
Supplier<ZoneId> defaultZone )
{
throw new UnsupportedOperationException( "not implemented" );
}
static OffsetTime defaultTime( ZoneId zoneId )
{
return OffsetTime.of( Field.hour.defaultValue, Field.minute.defaultValue, Field.second.defaultValue, Field.nanosecond.defaultValue,
ZoneOffset.of( zoneId.toString() ) );
}
static TimeBuilder<TimeValue> builder( Supplier<ZoneId> defaultZone )
{
return new TimeBuilder<TimeValue>( defaultZone )
{
@Override
protected boolean supportsTimeZone()
{
return true;
}
@Override
public TimeValue buildInternal()
{
boolean selectingTime = fields.containsKey( Field.time );
boolean selectingTimeZone;
OffsetTime result;
if ( selectingTime )
{
AnyValue time = fields.get( Field.time );
if ( !(time instanceof TemporalValue) )
{
throw new IllegalArgumentException( String.format( "Cannot construct time from: %s", time ) );
}
TemporalValue t = (TemporalValue) time;
result = t.getTimePart( defaultZone );
selectingTimeZone = t.hasTimeZone();
}
else
{
result = defaultTime( timezone() );
selectingTimeZone = false;
}
result = assignAllFields( result );
if ( timezone != null )
{
ZoneOffset currentOffset = ZonedDateTime.ofInstant( Instant.now(), timezone() ).getOffset();
if ( selectingTime && selectingTimeZone )
{
result = result.withOffsetSameInstant( currentOffset );
}
else
{
result = result.withOffsetSameLocal( currentOffset );
}
}
return time( result );
}
@Override
protected TimeValue selectTime(
AnyValue temporal )
{
if ( !(temporal instanceof TemporalValue) )
{
throw new IllegalArgumentException( String.format( "Cannot construct time from: %s", temporal ) );
}
if ( temporal instanceof TimeValue &&
timezone == null )
{
return (TimeValue) temporal;
}
TemporalValue v = (TemporalValue) temporal;
OffsetTime time = v.getTimePart( defaultZone );
if ( timezone != null )
{
ZoneOffset currentOffset = ZonedDateTime.ofInstant( Instant.now(), timezone() ).getOffset();
time = time.withOffsetSameInstant( currentOffset );
}
return time( time );
}
};
}
private final OffsetTime value;
private TimeValue( OffsetTime value )
{
this.value = value;
}
@Override
int unsafeCompareTo( Value otherValue )
{
TimeValue other = (TimeValue) otherValue;
return value.compareTo( other.value );
}
@Override
OffsetTime temporal()
{
return value;
}
@Override
LocalDate getDatePart()
{
throw new IllegalArgumentException( String.format( "Cannot get the date of: %s", this ) );
}
@Override
LocalTime getLocalTimePart()
{
return value.toLocalTime();
}
@Override
OffsetTime getTimePart( Supplier<ZoneId> defaultZone )
{
return value;
}
@Override
ZoneId getZoneId( Supplier<ZoneId> defaultZone )
{
return value.getOffset();
}
@Override
public boolean hasTimeZone()
{
return true;
}
@Override
public boolean equals( Value other )
{
// TODO: do we want equality to be this permissive?
// This means that time("14:30+0100") = time("15:30+0200")
return other instanceof TimeValue && value.isEqual( ((TimeValue) other).value );
}
@Override
public <E extends Exception> void writeTo( ValueWriter<E> writer ) throws E
{
int offset = value.getOffset().getTotalSeconds();
long seconds = value.getLong( ChronoField.SECOND_OF_DAY );
seconds = ((-offset % SECONDS_PER_DAY) + seconds + SECONDS_PER_DAY) % SECONDS_PER_DAY;
long nano = seconds * DurationValue.NANOS_PER_SECOND + value.getNano();
writer.writeTime( nano, offset );
}
@Override
public String prettyPrint()
{
return value.format( DateTimeFormatter.ISO_TIME );
}
@Override
public ValueGroup valueGroup()
{
return ValueGroup.ZONED_TIME;
}
@Override
protected int computeHash()
{
return Long.hashCode( value.toLocalTime().toNanoOfDay() - value.getOffset().getTotalSeconds() * 1000_000_000L );
}
@Override
public <T> T map( ValueMapper<T> mapper )
{
return mapper.mapTime( this );
}
@Override
public TimeValue add( DurationValue duration )
{
return replacement( value.plusNanos( duration.nanosOfDay() ) );
}
@Override
public TimeValue sub( DurationValue duration )
{
return replacement( value.minusNanos( duration.nanosOfDay() ) );
}
@Override
TimeValue replacement( OffsetTime time )
{
return time == value ? this : new TimeValue( time );
}
private static final String OFFSET_PATTERN = "(?<zone>Z|[+-](?<zoneHour>[0-9]{2})(?::?(?<zoneMinute>[0-9]{2}))?)";
static final String TIME_PATTERN = LocalTimeValue.TIME_PATTERN + "(?:" + OFFSET_PATTERN + ")?";
private static final Pattern PATTERN = Pattern.compile( "(?:T)?" + TIME_PATTERN );
private static final Pattern OFFSET = Pattern.compile( OFFSET_PATTERN );
static ZoneOffset parseOffset( String offset )
{
Matcher matcher = OFFSET.matcher( offset );
if ( matcher.matches() )
{
return parseOffset( matcher );
}
throw new IllegalArgumentException( "Not a valid offset: " + offset );
}
static ZoneOffset parseOffset( Matcher matcher )
{
String zone = matcher.group( "zone" );
if ( null == zone )
{
return null;
}
if ( "Z".equalsIgnoreCase( zone ) )
{
return UTC;
}
int factor = zone.charAt( 0 ) == '+' ? 1 : -1;
int hours = parseInt( matcher.group( "zoneHour" ) );
int minutes = optInt( matcher.group( "zoneMinute" ) );
return ZoneOffset.ofHoursMinutes( factor * hours, factor * minutes );
}
private static TimeValue parse( Matcher matcher, Supplier<ZoneId> defaultZone )
{
return new TimeValue( OffsetTime
.of( parseTime( matcher ), parseOffset( matcher, defaultZone ) ) );
}
private static ZoneOffset parseOffset( Matcher matcher, Supplier<ZoneId> defaultZone )
{
ZoneOffset offset = parseOffset( matcher );
if ( offset == null )
{
ZoneId zoneId = defaultZone.get();
offset = zoneId instanceof ZoneOffset ? (ZoneOffset) zoneId : zoneId.getRules().getOffset( Instant.now() );
}
return offset;
}
abstract static class TimeBuilder<Result> extends Builder<Result>
{
TimeBuilder( Supplier<ZoneId> defaultZone )
{
super( defaultZone );
}
@Override
protected final boolean supportsDate()
{
return false;
}
@Override
protected final boolean supportsTime()
{
return true;
}
@Override
protected boolean supportsEpoch()
{
return false;
}
protected abstract Result selectTime( AnyValue time );
}
}