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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) 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 .
 */
package org.neo4j.kernel.impl.api.index;

import java.io.File;
import java.util.concurrent.Future;

import org.neo4j.graphdb.ResourceIterator;
import org.neo4j.kernel.api.exceptions.index.IndexPopulationFailedKernelException;
import org.neo4j.kernel.api.index.IndexConfiguration;
import org.neo4j.kernel.api.index.IndexDescriptor;
import org.neo4j.kernel.api.index.InternalIndexState;
import org.neo4j.kernel.api.index.SchemaIndexProvider;
import org.neo4j.storageengine.api.schema.PopulationProgress;

import static org.neo4j.helpers.FutureAdapter.VOID;

public class RecoveringIndexProxy extends AbstractSwallowingIndexProxy
{
    public RecoveringIndexProxy( IndexDescriptor descriptor, SchemaIndexProvider.Descriptor providerDescriptor,
                                 IndexConfiguration configuration )
    {
        super( descriptor, providerDescriptor, null, configuration );
    }

    @Override
    public InternalIndexState getState()
    {
        return InternalIndexState.POPULATING;
    }

    @Override
    public boolean awaitStoreScanCompleted() throws IndexPopulationFailedKernelException, InterruptedException
    {
        throw unsupportedOperation( "Cannot await population on a recovering index." );
    }

    @Override
    public void activate()
    {
        throw  unsupportedOperation( "Cannot activate recovering index." );
    }

    @Override
    public void validate()
    {
        throw  unsupportedOperation( "Cannot validate recovering index." );
    }

    @Override
    public ResourceIterator snapshotFiles()
    {
        throw  unsupportedOperation( "Cannot snapshot a recovering index." );
    }

    @Override
    public Future drop()
    {
        return VOID;
    }

    @Override
    public IndexPopulationFailure getPopulationFailure() throws IllegalStateException
    {
        throw new IllegalStateException( this + " is recovering" );
    }

    @Override
    public PopulationProgress getIndexPopulationProgress()
    {
        throw new IllegalStateException( this + " is recovering" );
    }

    private UnsupportedOperationException unsupportedOperation( String message )
    {
        return new UnsupportedOperationException( message + " Recovering Index" + getDescriptor() );
    }
}