/*
// $Id: //open/dev/farrago/src/org/eigenbase/rel/convert/FactoryConverterRule.java#9 $
// Package org.eigenbase is a class library of data management components.
// Copyright (C) 2005-2009 The Eigenbase Project
// Copyright (C) 2002-2009 SQLstream, Inc.
// Copyright (C) 2005-2009 LucidEra, Inc.
// Portions Copyright (C) 2003-2009 John V. Sichi
//
// This program 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 2 of the License, or (at your option)
// any later version approved by The Eigenbase Project.
//
// 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, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/
package org.eigenbase.rel.convert;

import org.eigenbase.rel.*;


/**
 * Generic implementation of {@link ConverterRule} which lets a {@link
 * ConverterFactory} do the work.
 *
 * @author jhyde
 * @version $Id: //open/dev/farrago/src/org/eigenbase/rel/convert/FactoryConverterRule.java#9 $
 * @since Jun 18, 2003
 */
public class FactoryConverterRule
    extends ConverterRule
{
    //~ Instance fields --------------------------------------------------------

    private final ConverterFactory factory;

    //~ Constructors -----------------------------------------------------------

    public FactoryConverterRule(ConverterFactory factory)
    {
        super(
            RelNode.class,
            factory.getInConvention(),
            factory.getConvention(),
            null);
        this.factory = factory;
    }

    //~ Methods ----------------------------------------------------------------

    public boolean isGuaranteed()
    {
        return true;
    }

    public RelNode convert(RelNode rel)
    {
        return factory.convert(rel);
    }
}

// End FactoryConverterRule.java
