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LuceneFulltext.java
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LuceneFulltext.java
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/*
* Copyright (c) 2002-2017 "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 Affero 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.kernel.api.impl.fulltext;
import org.apache.lucene.analysis.Analyzer;
import java.io.IOException;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Objects;
import java.util.Set;
import org.neo4j.kernel.api.impl.index.AbstractLuceneIndex;
import org.neo4j.kernel.api.impl.index.partition.AbstractIndexPartition;
import org.neo4j.kernel.api.impl.index.partition.IndexPartitionFactory;
import org.neo4j.kernel.api.impl.index.partition.PartitionSearcher;
import org.neo4j.kernel.api.impl.index.partition.WritableIndexPartitionFactory;
import org.neo4j.kernel.api.impl.index.storage.PartitionedIndexStorage;
import org.neo4j.kernel.api.impl.schema.writer.PartitionedIndexWriter;
import org.neo4j.kernel.api.index.InternalIndexState;
class LuceneFulltext extends AbstractLuceneIndex
{
private final Analyzer analyzer;
private final String identifier;
private final FulltextIndexType type;
private Set<String> properties;
private volatile InternalIndexState state;
LuceneFulltext( PartitionedIndexStorage indexStorage, IndexPartitionFactory partitionFactory, Collection<String> properties, Analyzer analyzer,
String identifier,
FulltextIndexType type )
{
super( indexStorage, partitionFactory );
this.properties = Collections.unmodifiableSet( new HashSet<>( properties ) );
this.analyzer = analyzer;
this.identifier = identifier;
this.type = type;
state = InternalIndexState.POPULATING;
}
LuceneFulltext( PartitionedIndexStorage indexStorage, WritableIndexPartitionFactory partitionFactory, Analyzer analyzer, String identifier,
FulltextIndexType type ) throws IOException
{
this( indexStorage, partitionFactory, Collections.EMPTY_SET, analyzer, identifier, type );
this.properties = readProperties();
}
private Set<String> readProperties() throws IOException
{
Set<String> props;
open();
FulltextIndexConfiguration configurationDocument;
try ( ReadOnlyFulltext indexReader = getIndexReader() )
{
configurationDocument = indexReader.getConfigurationDocument();
}
if ( configurationDocument != null )
{
props = Collections.unmodifiableSet( configurationDocument.getProperties() );
}
else
{
props = Collections.emptySet();
}
close();
return props;
}
@Override
public boolean equals( Object o )
{
if ( this == o )
{
return true;
}
if ( o == null || getClass() != o.getClass() )
{
return false;
}
LuceneFulltext that = (LuceneFulltext) o;
if ( !identifier.equals( that.identifier ) )
{
return false;
}
return type == that.type;
}
@Override
public int hashCode()
{
return Objects.hash( identifier, type );
}
PartitionedIndexWriter getIndexWriter( WritableFulltext writableIndex ) throws IOException
{
ensureOpen();
return new PartitionedIndexWriter( writableIndex );
}
ReadOnlyFulltext getIndexReader() throws IOException
{
ensureOpen();
List<AbstractIndexPartition> partitions = getPartitions();
return hasSinglePartition( partitions ) ? createSimpleReader( partitions ) : createPartitionedReader( partitions );
}
FulltextIndexType getType()
{
return type;
}
Set<String> getProperties()
{
return properties;
}
String getIdentifier()
{
return identifier;
}
private SimpleFulltextReader createSimpleReader( List<AbstractIndexPartition> partitions ) throws IOException
{
AbstractIndexPartition singlePartition = getFirstPartition( partitions );
PartitionSearcher partitionSearcher = singlePartition.acquireSearcher();
return new SimpleFulltextReader( partitionSearcher, properties.toArray( new String[0] ), analyzer );
}
private PartitionedFulltextReader createPartitionedReader( List<AbstractIndexPartition> partitions ) throws IOException
{
List<PartitionSearcher> searchers = acquireSearchers( partitions );
return new PartitionedFulltextReader( searchers, properties.toArray( new String[0] ), analyzer );
}
void saveConfiguration( long txId ) throws IOException
{
PartitionedIndexWriter writer = getIndexWriter( new WritableFulltext( this ) );
String analyzerName = analyzer.getClass().getCanonicalName();
FulltextIndexConfiguration config = new FulltextIndexConfiguration( analyzerName, properties, txId );
writer.updateDocument( FulltextIndexConfiguration.TERM, config.asDocument() );
}
String getAnalyzerName()
{
return analyzer.getClass().getCanonicalName();
}
InternalIndexState getState()
{
return state;
}
void setPopulated()
{
state = InternalIndexState.ONLINE;
}
void setFailed()
{
state = InternalIndexState.FAILED;
}
}