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NativeUniqueSchemaNumberIndexPopulator.java
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NativeUniqueSchemaNumberIndexPopulator.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 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.impl.index.schema;
import java.io.File;
import org.neo4j.index.internal.gbptree.Layout;
import org.neo4j.index.internal.gbptree.RecoveryCleanupWorkCollector;
import org.neo4j.io.pagecache.PageCache;
import org.neo4j.kernel.api.index.IndexEntryUpdate;
import org.neo4j.kernel.impl.api.index.sampling.UniqueIndexSampler;
import org.neo4j.storageengine.api.schema.IndexSample;
/**
* {@link NativeSchemaNumberIndexPopulator} which can enforces unique values.
*/
class NativeUniqueSchemaNumberIndexPopulator<KEY extends NumberKey, VALUE extends NumberValue>
extends NativeSchemaNumberIndexPopulator<KEY,VALUE>
{
private final UniqueIndexSampler sampler;
NativeUniqueSchemaNumberIndexPopulator( PageCache pageCache, File storeFile, Layout<KEY,VALUE> layout,
RecoveryCleanupWorkCollector recoveryCleanupWorkCollector )
{
super( pageCache, storeFile, layout, recoveryCleanupWorkCollector );
this.sampler = new UniqueIndexSampler();
}
@Override
public void includeSample( IndexEntryUpdate update )
{
sampler.increment( 1 );
}
@Override
public void configureSampling( boolean onlineSampling )
{
// nothing to configure so far
}
@Override
public IndexSample sampleResult()
{
return sampler.result();
}
}