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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.util.List;
import org.neo4j.function.Factory;
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;
/**
* Used for creating {@link LuceneFulltext} and registering those to a {@link FulltextProvider}.
*/
public class FulltextFactory
{
public static final String INDEX_DIR = "fulltext";
private final FileSystemAbstraction fileSystem;
private final WritableIndexPartitionFactory partitionFactory;
private final File indexDir;
private final Analyzer analyzer;
/**
* Creates a factory for the specified location and analyzer.
* @param fileSystem The filesystem to use.
* @param storeDir Store directory of the database.
* @param analyzer The Lucene analyzer to use for the {@link LuceneFulltext} created by this factory.
* @throws IOException
*/
public FulltextFactory( FileSystemAbstraction fileSystem, File storeDir, Analyzer analyzer ) throws IOException
{
this.analyzer = analyzer;
this.fileSystem = fileSystem;
Factory<IndexWriterConfig> indexWriterConfigFactory = () -> IndexWriterConfigs.standard( analyzer );
partitionFactory = new WritableIndexPartitionFactory( indexWriterConfigFactory );
indexDir = new File( storeDir, INDEX_DIR );
}
/**
* Creates an instance of {@link LuceneFulltext} and registers it with the supplied {@link FulltextProvider}.
* @param identifier The identifier of the new fulltext index
* @param type The type of the new fulltext index
* @param properties The properties to index
* @param provider The provider to register with
* @throws IOException
*/
public void createFulltextIndex( String identifier, FulltextProvider.FULLTEXT_INDEX_TYPE type, List<String> properties, FulltextProvider provider )
throws IOException
{
LuceneIndexStorageBuilder storageBuilder = LuceneIndexStorageBuilder.create();
storageBuilder.withFileSystem( fileSystem ).withIndexIdentifier( identifier ).withIndexRootFolder( indexDir );
provider.register( new LuceneFulltext( storageBuilder.build(), partitionFactory, properties, analyzer, identifier, type ) );
}
}