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PropertyChain.java
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PropertyChain.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.consistency.checking;
import org.eclipse.collections.api.set.primitive.MutableIntSet;
import org.eclipse.collections.impl.set.mutable.primitive.IntHashSet;
import java.util.Iterator;
import java.util.function.Function;
import org.neo4j.consistency.checking.full.MandatoryProperties;
import org.neo4j.consistency.report.ConsistencyReport;
import org.neo4j.consistency.store.RecordAccess;
import org.neo4j.kernel.impl.store.record.PrimitiveRecord;
import org.neo4j.kernel.impl.store.record.PropertyRecord;
import org.neo4j.kernel.impl.store.record.Record;
public class PropertyChain<RECORD extends PrimitiveRecord, REPORT extends ConsistencyReport.PrimitiveConsistencyReport>
implements RecordField<RECORD,REPORT>, ComparativeRecordChecker<RECORD, PropertyRecord, REPORT>
{
private final Function<RECORD,MandatoryProperties.Check<RECORD,REPORT>> mandatoryProperties;
public PropertyChain( Function<RECORD,MandatoryProperties.Check<RECORD,REPORT>> mandatoryProperties )
{
this.mandatoryProperties = mandatoryProperties;
}
@Override
public void checkConsistency( RECORD record, CheckerEngine<RECORD, REPORT> engine,
RecordAccess records )
{
if ( !Record.NO_NEXT_PROPERTY.is( record.getNextProp() ) )
{
// Check the whole chain here instead of scattered during multiple checks.
// This type of check obviously favors chains with good locality, performance-wise.
Iterator<PropertyRecord> props = records.rawPropertyChain( record.getNextProp() );
PropertyRecord firstProp = props.next();
if ( !Record.NO_PREVIOUS_PROPERTY.is( firstProp.getPrevProp() ) )
{
engine.report().propertyNotFirstInChain( firstProp );
}
final MutableIntSet keys = new IntHashSet();
try (
MandatoryProperties.Check<RECORD,REPORT> mandatory = mandatoryProperties.apply( record ) )
{
checkChainItem( firstProp, engine, keys, mandatory );
// Check the whole chain here. We also take the opportunity to check mandatory property constraints.
while ( props.hasNext() )
{
checkChainItem( props.next(), engine, keys, mandatory );
}
}
}
}
private void checkChainItem( PropertyRecord property, CheckerEngine<RECORD,REPORT> engine,
MutableIntSet keys, MandatoryProperties.Check<RECORD,REPORT> mandatory )
{
if ( !property.inUse() )
{
engine.report().propertyNotInUse( property );
}
else
{
int[] keysInRecord = ChainCheck.keys( property );
if ( mandatory != null )
{
mandatory.receive( keysInRecord );
}
for ( int key : keysInRecord )
{
if ( !keys.add( key ) )
{
engine.report().propertyKeyNotUniqueInChain();
}
}
}
}
@Override
public long valueFrom( RECORD record )
{
return record.getNextProp();
}
@Override
public void checkReference( RECORD record, PropertyRecord property, CheckerEngine<RECORD, REPORT> engine,
RecordAccess records )
{
if ( !property.inUse() )
{
engine.report().propertyNotInUse( property );
}
else
{
if ( !Record.NO_PREVIOUS_PROPERTY.is( property.getPrevProp() ) )
{
engine.report().propertyNotFirstInChain( property );
}
new ChainCheck<RECORD, REPORT>().checkReference( record, property, engine, records );
}
}
}