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Neo4j kernel is a lightweight, embedded Java database designed to store data structured as graphs rather than tables. For more information, see http://neo4j.org.

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/*
 * Copyright (c) "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 .
 */
package org.neo4j.kernel.impl.api.index;

import org.neo4j.common.TokenNameLookup;
import org.neo4j.internal.schema.IndexDescriptor;
import org.neo4j.kernel.api.index.IndexSample;
import org.neo4j.kernel.impl.api.index.stats.IndexStatisticsStore;

class ValueIndexProxyStrategy implements IndexProxyStrategy
{
    private final IndexDescriptor indexDescriptor;
    private final IndexStatisticsStore statisticsStore;
    private final String indexUserDescription;

    ValueIndexProxyStrategy( IndexDescriptor indexDescriptor, IndexStatisticsStore statisticsStore, TokenNameLookup tokenNameLookup )
    {
        this.indexDescriptor = indexDescriptor;
        this.statisticsStore = statisticsStore;
        indexUserDescription = indexDescriptor.userDescription( tokenNameLookup );
    }

    @Override
    public IndexDescriptor getIndexDescriptor()
    {
        return indexDescriptor;
    }

    @Override
    public void removeStatisticsForIndex()
    {
        statisticsStore.removeIndex( indexDescriptor.getId() );
    }

    @Override
    public void incrementUpdateStatisticsForIndex( long delta )
    {
        statisticsStore.incrementIndexUpdates( indexDescriptor.getId(), delta );
    }

    @Override
    public void replaceStatisticsForIndex( IndexSample sample )
    {
        statisticsStore.replaceStats( indexDescriptor.getId(), sample );
    }

    @Override
    public void changeIndexDescriptor( IndexDescriptor descriptor )
    {
        throw new UnsupportedOperationException( "Changing descriptor on this index proxy strategy is not allowed" );
    }

    @Override
    public String getIndexUserDescription()
    {
        return indexUserDescription;
    }
}