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NodePropertyReader.java
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NodePropertyReader.java
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/*
* Copyright (c) 2002-2018 "Neo4j,"
* Neo4j Sweden AB [http://neo4j.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.full;
import java.util.ArrayList;
import java.util.Collection;
import java.util.LinkedList;
import java.util.List;
import org.neo4j.kernel.api.index.NodePropertyAccessor;
import org.neo4j.kernel.impl.store.NodeStore;
import org.neo4j.kernel.impl.store.PropertyStore;
import org.neo4j.kernel.impl.store.StoreAccess;
import org.neo4j.kernel.impl.store.record.NodeRecord;
import org.neo4j.kernel.impl.store.record.PropertyBlock;
import org.neo4j.kernel.impl.store.record.PropertyRecord;
import org.neo4j.kernel.impl.store.record.Record;
import org.neo4j.values.storable.Value;
import org.neo4j.values.storable.Values;
import static org.neo4j.kernel.impl.store.record.RecordLoad.FORCE;
public class NodePropertyReader implements NodePropertyAccessor
{
private final PropertyStore propertyStore;
private final NodeStore nodeStore;
public NodePropertyReader( StoreAccess storeAccess )
{
this.propertyStore = storeAccess.getRawNeoStores().getPropertyStore();
this.nodeStore = storeAccess.getRawNeoStores().getNodeStore();
}
public Collection<PropertyRecord> getPropertyRecordChain( NodeRecord nodeRecord )
{
return getPropertyRecordChain( nodeRecord.getNextProp() );
}
public Collection<PropertyRecord> getPropertyRecordChain( long firstId )
{
long nextProp = firstId;
List<PropertyRecord> toReturn = new LinkedList<>();
while ( nextProp != Record.NO_NEXT_PROPERTY.intValue() )
{
PropertyRecord propRecord = propertyStore.getRecord( nextProp, propertyStore.newRecord(), FORCE );
toReturn.add( propRecord );
nextProp = propRecord.getNextProp();
}
return toReturn;
}
public List<PropertyBlock> propertyBlocks( Collection<PropertyRecord> records )
{
List<PropertyBlock> propertyBlocks = new ArrayList<>();
for ( PropertyRecord record : records )
{
for ( PropertyBlock block : record )
{
propertyBlocks.add( block );
}
}
return propertyBlocks;
}
public List<PropertyBlock> propertyBlocks( NodeRecord nodeRecord )
{
Collection<PropertyRecord> records = propertyStore.getPropertyRecordChain( nodeRecord.getNextProp() );
List<PropertyBlock> propertyBlocks = new ArrayList<>();
for ( PropertyRecord record : records )
{
for ( PropertyBlock block : record )
{
propertyBlocks.add( block );
}
}
return propertyBlocks;
}
public Value propertyValue( PropertyBlock block )
{
return block.getType().value( block, propertyStore );
}
@Override
public Value getNodePropertyValue( long nodeId, int propertyKeyId )
{
NodeRecord nodeRecord = nodeStore.newRecord();
if ( nodeStore.getRecord( nodeId, nodeRecord, FORCE ).inUse() )
{
for ( PropertyBlock block : propertyBlocks( nodeRecord ) )
{
if ( block.getKeyIndexId() == propertyKeyId )
{
return propertyValue( block );
}
}
}
return Values.NO_VALUE;
}
}