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ZonedTimeSchemaKey.java
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ZonedTimeSchemaKey.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.kernel.impl.index.schema;
import java.time.ZoneOffset;
import org.neo4j.kernel.impl.store.TimeZones;
import org.neo4j.values.storable.TimeValue;
import org.neo4j.values.storable.Value;
import static java.lang.String.format;
import static org.neo4j.values.storable.Values.NO_VALUE;
/**
* Includes value and entity id (to be able to handle non-unique values). A value can be any {@link TimeValue}.
*
* With these keys the TimeValues are sorted by UTC time of day, and then by time zone.
*/
class ZonedTimeSchemaKey extends NativeSchemaKey<ZonedTimeSchemaKey>
{
static final int SIZE =
Long.BYTES + /* nanosOfDayUTC */
Integer.BYTES + /* zoneOffsetSeconds */
Long.BYTES; /* entityId */
long nanosOfDayUTC;
int zoneOffsetSeconds;
@Override
public Value asValue()
{
// We need to check validity upfront without throwing exceptions, because the PageCursor might give garbage bytes
if ( TimeZones.validZoneOffset( zoneOffsetSeconds ) )
{
return TimeValue.time( nanosOfDayUTC, ZoneOffset.ofTotalSeconds( zoneOffsetSeconds ) );
}
return NO_VALUE;
}
@Override
public void initValueAsLowest()
{
nanosOfDayUTC = Long.MIN_VALUE;
zoneOffsetSeconds = Integer.MIN_VALUE;
}
@Override
public void initValueAsHighest()
{
nanosOfDayUTC = Long.MAX_VALUE;
zoneOffsetSeconds = Integer.MAX_VALUE;
}
@Override
public int compareValueTo( ZonedTimeSchemaKey other )
{
int compare = Long.compare( nanosOfDayUTC, other.nanosOfDayUTC );
if ( compare == 0 )
{
compare = Integer.compare( zoneOffsetSeconds, other.zoneOffsetSeconds );
}
return compare;
}
@Override
public String toString()
{
return format( "value=%s,entityId=%d,nanosOfDayUTC=%d,zoneOffsetSeconds=%d",
asValue(), getEntityId(), nanosOfDayUTC, zoneOffsetSeconds );
}
@Override
public void writeTime( long nanosOfDayUTC, int offsetSeconds )
{
this.nanosOfDayUTC = nanosOfDayUTC;
this.zoneOffsetSeconds = offsetSeconds;
}
@Override
protected Value assertCorrectType( Value value )
{
if ( !(value instanceof TimeValue) )
{
throw new IllegalArgumentException(
"Key layout does only support TimeValue, tried to create key from " + value );
}
return value;
}
}