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PropertyReader.java
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PropertyReader.java
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/*
* Copyright (c) 2002-2016 "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.legacy.consistency.checking.full;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import org.neo4j.function.Suppliers;
import org.neo4j.kernel.api.index.PropertyAccessor;
import org.neo4j.kernel.api.properties.DefinedProperty;
import org.neo4j.kernel.api.properties.Property;
import org.neo4j.kernel.impl.store.InvalidRecordException;
import org.neo4j.kernel.impl.store.NodeStore;
import org.neo4j.kernel.impl.store.PropertyStore;
import org.neo4j.kernel.impl.store.record.NodeRecord;
import org.neo4j.kernel.impl.store.record.PropertyBlock;
import org.neo4j.kernel.impl.store.record.PropertyRecord;
public class PropertyReader implements PropertyAccessor
{
private final PropertyStore propertyStore;
private final NodeStore nodeStore;
public PropertyReader( PropertyStore propertyStore, NodeStore nodeStore )
{
this.propertyStore = propertyStore;
this.nodeStore = nodeStore;
}
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 DefinedProperty propertyValue( PropertyBlock block )
{
return block.getType().readProperty( block.getKeyIndexId(), block, Suppliers.singleton( propertyStore ) );
}
@Override
public Property getProperty( long nodeId, int propertyKeyId )
{
try
{
NodeRecord nodeRecord = nodeStore.getRecord( nodeId );
for ( PropertyBlock block : propertyBlocks( nodeRecord ) )
{
if ( block.getKeyIndexId() == propertyKeyId )
{
return propertyValue( block );
}
}
}
catch ( InvalidRecordException e )
{
// Fine, we'll just return an empty property below
}
return Property.noNodeProperty( nodeId, propertyKeyId );
}
}