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LuceneSchemaIndexBuilder.java
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LuceneSchemaIndexBuilder.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.kernel.api.impl.schema;
import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.IndexWriterConfig;
import java.util.Map;
import org.neo4j.function.Factory;
import org.neo4j.graphdb.factory.GraphDatabaseSettings;
import org.neo4j.kernel.api.impl.index.IndexWriterConfigs;
import org.neo4j.kernel.api.impl.index.builder.AbstractLuceneIndexBuilder;
import org.neo4j.kernel.api.index.IndexConfiguration;
import org.neo4j.kernel.configuration.Config;
import org.neo4j.kernel.impl.api.index.sampling.IndexSamplingConfig;
import static org.neo4j.helpers.collection.MapUtil.stringMap;
/**
* Helper builder class to simplify construction and instantiation of lucene schema indexes.
* Most of the values already have most useful default value, that still can be overridden by corresponding
* builder methods.
*
* @see LuceneSchemaIndex
* @see AbstractLuceneIndexBuilder
*/
public class LuceneSchemaIndexBuilder extends AbstractLuceneIndexBuilder<LuceneSchemaIndexBuilder>
{
private IndexSamplingConfig samplingConfig = new IndexSamplingConfig( new Config() );
private IndexConfiguration indexConfig = IndexConfiguration.NON_UNIQUE;
private Factory<IndexWriterConfig> writerConfigFactory = IndexWriterConfigs::standard;
private LuceneSchemaIndexBuilder()
{
}
/**
* Create new lucene schema index builder.
*
* @return new LuceneSchemaIndexBuilder
*/
public static LuceneSchemaIndexBuilder create()
{
return new LuceneSchemaIndexBuilder();
}
/**
* Specify lucene schema index sampling config
*
* @param samplingConfig sampling config
* @return index builder
*/
public LuceneSchemaIndexBuilder withSamplingConfig( IndexSamplingConfig samplingConfig )
{
this.samplingConfig = samplingConfig;
return this;
}
/**
* Specify lucene schema index sampling buffer size
*
* @param size sampling buffer size
* @return index builder
*/
public LuceneSchemaIndexBuilder withSamplingBufferSize( int size )
{
Map<String,String> params = stringMap( GraphDatabaseSettings.index_sampling_buffer_size.name(), size + "" );
Config config = new Config( params );
this.samplingConfig = new IndexSamplingConfig( config );
return this;
}
/**
* Specify lucene schema index config
*
* @param indexConfig index config
* @return index builder
*/
public LuceneSchemaIndexBuilder withIndexConfig( IndexConfiguration indexConfig )
{
this.indexConfig = indexConfig;
return this;
}
/**
* Specify {@link Factory} of lucene {@link IndexWriterConfig} to create {@link IndexWriter}s.
*
* @param writerConfigFactory the supplier of writer configs
* @return index builder
*/
public LuceneSchemaIndexBuilder withWriterConfig( Factory<IndexWriterConfig> writerConfigFactory )
{
this.writerConfigFactory = writerConfigFactory;
return this;
}
/**
* Transform builder to build unique index
*
* @return index builder
*/
public LuceneSchemaIndexBuilder uniqueIndex()
{
this.indexConfig = IndexConfiguration.UNIQUE;
return this;
}
/**
* Build lucene schema index with specified configuration
*
* @return lucene schema index
*/
public LuceneSchemaIndex build()
{
return new LuceneSchemaIndex( storageBuilder.build(), indexConfig, samplingConfig, writerConfigFactory );
}
}