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TemporalIndexPopulatingUpdater.java
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TemporalIndexPopulatingUpdater.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.io.IOException;
import org.neo4j.kernel.api.exceptions.index.IndexEntryConflictException;
import org.neo4j.kernel.api.index.IndexEntryUpdate;
import org.neo4j.kernel.api.index.IndexUpdater;
import org.neo4j.kernel.api.index.PropertyAccessor;
public class TemporalIndexPopulatingUpdater extends TemporalIndexCache<IndexUpdater,IOException> implements IndexUpdater
{
TemporalIndexPopulatingUpdater( TemporalIndexPopulator populator, PropertyAccessor propertyAccessor )
{
super( new PartFactory( populator, propertyAccessor ) );
}
@Override
public void process( IndexEntryUpdate<?> update ) throws IOException, IndexEntryConflictException
{
switch ( update.updateMode() )
{
case ADDED:
select( update.values()[0].valueGroup() ).process( update );
break;
case CHANGED:
// These are both temporal, but could belong in different parts
IndexUpdater from = select( update.beforeValues()[0].valueGroup() );
IndexUpdater to = select( update.values()[0].valueGroup() );
// There are two cases:
// - both before/after go into the same updater --> pass update into that updater
if ( from == to )
{
from.process( update );
}
// - before go into one and after into the other --> REMOVED from one and ADDED into the other
else
{
from.process( IndexEntryUpdate.remove( update.getEntityId(), update.indexKey(), update.beforeValues() ) );
to.process( IndexEntryUpdate.add( update.getEntityId(), update.indexKey(), update.values() ) );
}
break;
case REMOVED:
select( update.values()[0].valueGroup() ).process( update );
break;
default:
throw new IllegalArgumentException( "Unknown update mode" );
}
}
@Override
public void close() throws IOException, IndexEntryConflictException
{
for ( IndexUpdater part : this )
{
part.close();
}
}
static class PartFactory implements TemporalIndexCache.Factory<IndexUpdater,IOException>
{
private final TemporalIndexPopulator populator;
private PropertyAccessor propertyAccessor;
PartFactory( TemporalIndexPopulator populator, PropertyAccessor propertyAccessor )
{
this.populator = populator;
this.propertyAccessor = propertyAccessor;
}
@Override
public IndexUpdater newDate() throws IOException
{
return populator.date().newPopulatingUpdater( propertyAccessor );
}
@Override
public IndexUpdater newDateTime() throws IOException
{
throw new UnsupportedOperationException( "too tired to write" );
}
@Override
public IndexUpdater newDateTimeZoned() throws IOException
{
throw new UnsupportedOperationException( "too tired to write" );
}
@Override
public IndexUpdater newTime() throws IOException
{
return populator.time().newPopulatingUpdater( propertyAccessor );
}
@Override
public IndexUpdater newTimeZoned() throws IOException
{
throw new UnsupportedOperationException( "too tired to write" );
}
@Override
public IndexUpdater newDuration() throws IOException
{
throw new UnsupportedOperationException( "too tired to write" );
}
}
}