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FulltextFactory.java
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FulltextFactory.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 org.apache.lucene.index.IndexWriterConfig;
import java.io.File;
import java.io.IOException;
import java.nio.file.Paths;
import org.neo4j.function.Factory;
import org.neo4j.graphdb.factory.GraphDatabaseSettings;
import org.neo4j.io.fs.FileSystemAbstraction;
import org.neo4j.kernel.api.impl.index.IndexWriterConfigs;
import org.neo4j.kernel.api.impl.index.builder.LuceneIndexStorageBuilder;
import org.neo4j.kernel.api.impl.index.partition.WritableIndexPartitionFactory;
import org.neo4j.kernel.configuration.Config;
import static org.neo4j.kernel.api.impl.index.LuceneKernelExtensions.directoryFactory;
public class FulltextFactory
{
private final FileSystemAbstraction fileSystem;
private final String[] properties;
private final WritableIndexPartitionFactory partitionFactory;
private final Factory<IndexWriterConfig> population;
private final File storeDir;
private final Analyzer analyzer;
public LuceneFulltext createFulltextHelper( String identifier, FULLTEXT_HELPER_TYPE type )
{
LuceneIndexStorageBuilder storageBuilder = LuceneIndexStorageBuilder.create();
storageBuilder.withFileSystem( fileSystem ).withIndexIdentifier( identifier ).withDirectoryFactory(
directoryFactory( false, this.fileSystem ) ).withIndexRootFolder( Paths.get( this.storeDir.getAbsolutePath(), "fulltextHelper" ).toFile() );
return new LuceneFulltext( storageBuilder.build(), partitionFactory, this.properties, analyzer, identifier, type );
}
public enum FULLTEXT_HELPER_TYPE
{
NODES,
RELATIONSHIPS
}
public FulltextFactory( FileSystemAbstraction fileSystem, File storeDir, Config config ) throws IOException
{
this.fileSystem = fileSystem;
this.properties = config.get( GraphDatabaseSettings.bloom_indexed_properties ).toArray( new String[0] );
try
{
Class configuredAnalayzer = Class.forName( config.get( GraphDatabaseSettings.bloom_analyzer ) );
analyzer = (Analyzer) configuredAnalayzer.newInstance();
}
catch ( Exception e )
{
throw new RuntimeException( "Could not create the configured analyzer", e );
}
population = () -> IndexWriterConfigs.population( analyzer );
partitionFactory = new WritableIndexPartitionFactory( population );
this.storeDir = storeDir;
}
}