/**
 * PODD is an OWL ontology database used for scientific project management
 *
 * Copyright (C) 2009-2013 The University Of Queensland
 *
 * This program is free software: you can redistribute it and/or modify it under the terms of the
 * GNU Affero 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
 * Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License along with this program.
 * If not, see <http://www.gnu.org/licenses/>.
 */
package com.github.podd.utils;

import org.openrdf.repository.Repository;
import org.openrdf.repository.RepositoryException;
import org.openrdf.repository.base.RepositoryWrapper;

/**
 * A wrapper for a {@link Repository} that does not get shutdown when calling {@link #shutDown()}.
 * Instead, {@link #realShutDown()} must be called to shut the repository down.
 *
 * @author Peter Ansell p_ansell@yahoo.com
 *
 */
public class ManualShutdownRepository extends RepositoryWrapper
{
    /**
     * Wrap the given repository to make {@link Repository#shutDown()} a no-op, and replace it with
     * calls to {@link #realShutDown()} as necessary, to avoid user code shutting down the
     * repository at unexpected times.
     *
     * @param delegate
     *            The Repository to wrap.
     */
    public ManualShutdownRepository(final Repository delegate)
    {
        super(delegate);
    }
    
    @Override
    public void shutDown() throws RepositoryException
    {
        // Do nothing, to avoid accidental shutdowns by shutting down the federation
    }
    
    public void realShutDown() throws RepositoryException
    {
        if(this.getDelegate() instanceof ManualShutdownRepository)
        {
            ((ManualShutdownRepository)this.getDelegate()).realShutDown();
        }
        else
        {
            this.getDelegate().shutDown();
        }
    }
}