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FulltextIndexPopulator.java
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FulltextIndexPopulator.java
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/*
* Copyright (c) 2002-2019 "Neo4j,"
* Neo4j Sweden AB [http://neo4j.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.fulltext;
import org.apache.lucene.document.Document;
import java.io.IOException;
import java.io.UncheckedIOException;
import java.util.Collection;
import org.neo4j.function.ThrowingAction;
import org.neo4j.kernel.api.impl.index.DatabaseIndex;
import org.neo4j.kernel.api.impl.schema.populator.LuceneIndexPopulator;
import org.neo4j.kernel.api.index.IndexEntryUpdate;
import org.neo4j.kernel.api.index.IndexUpdater;
import org.neo4j.storageengine.api.NodePropertyAccessor;
import org.neo4j.storageengine.api.schema.IndexSample;
public class FulltextIndexPopulator extends LuceneIndexPopulator<DatabaseIndex<FulltextIndexReader>>
{
private final FulltextIndexDescriptor descriptor;
private final ThrowingAction<IOException> descriptorCreateAction;
public FulltextIndexPopulator( FulltextIndexDescriptor descriptor, DatabaseIndex<FulltextIndexReader> luceneFulltext,
ThrowingAction<IOException> descriptorCreateAction )
{
super( luceneFulltext );
this.descriptor = descriptor;
this.descriptorCreateAction = descriptorCreateAction;
}
@Override
public void create()
{
super.create();
try
{
descriptorCreateAction.apply();
}
catch ( IOException e )
{
throw new UncheckedIOException( e );
}
}
@Override
public void add( Collection<? extends IndexEntryUpdate<?>> updates )
{
try
{
for ( IndexEntryUpdate<?> update : updates )
{
writer.updateDocument( LuceneFulltextDocumentStructure.newTermForChangeOrRemove( update.getEntityId() ), updateAsDocument( update ) );
}
}
catch ( IOException e )
{
throw new UncheckedIOException( e );
}
}
@Override
public void verifyDeferredConstraints( NodePropertyAccessor propertyAccessor )
{
//Fulltext index does not care about constraints.
}
@Override
public IndexUpdater newPopulatingUpdater( NodePropertyAccessor accessor )
{
return new PopulatingFulltextIndexUpdater();
}
@Override
public void includeSample( IndexEntryUpdate<?> update )
{
//Index sampling is not our thing, really.
}
@Override
public IndexSample sampleResult()
{
return new IndexSample();
}
private Document updateAsDocument( IndexEntryUpdate<?> update )
{
return LuceneFulltextDocumentStructure.documentRepresentingProperties( update.getEntityId(), descriptor.propertyNames(), update.values() );
}
private class PopulatingFulltextIndexUpdater implements IndexUpdater
{
@Override
public void process( IndexEntryUpdate<?> update )
{
assert update.indexKey().schema().equals( descriptor.schema() );
try
{
switch ( update.updateMode() )
{
case ADDED:
long nodeId = update.getEntityId();
luceneIndex.getIndexWriter().updateDocument( LuceneFulltextDocumentStructure.newTermForChangeOrRemove( nodeId ),
LuceneFulltextDocumentStructure.documentRepresentingProperties( nodeId, descriptor.propertyNames(), update.values() ) );
case CHANGED:
long nodeId1 = update.getEntityId();
luceneIndex.getIndexWriter().updateDocument( LuceneFulltextDocumentStructure.newTermForChangeOrRemove( nodeId1 ),
LuceneFulltextDocumentStructure.documentRepresentingProperties( nodeId1, descriptor.propertyNames(), update.values() ) );
break;
case REMOVED:
luceneIndex.getIndexWriter().deleteDocuments( LuceneFulltextDocumentStructure.newTermForChangeOrRemove( update.getEntityId() ) );
break;
default:
throw new UnsupportedOperationException();
}
}
catch ( IOException e )
{
throw new UncheckedIOException( e );
}
}
@Override
public void close()
{
}
}
}