/**
Copyright (C) SYSTAP, LLC DBA Blazegraph 2006-2016. All rights reserved.
Contact:
SYSTAP, LLC DBA Blazegraph
2501 Calvert ST NW #106
Washington, DC 20008
licenses@blazegraph.com
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; version 2 of the License.
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
*/
/*
* Created on Aug 23, 2011
*/
package com.bigdata.rdf.sparql.ast.optimizers;
import com.bigdata.rdf.sparql.ast.QueryNodeWithBindingSet;
import com.bigdata.rdf.sparql.ast.eval.AST2BOpContext;
/**
* Interface for AST rewrites.
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
* @version $Id$
*/
public interface IASTOptimizer {
/**
* Optimize the AST.
*
* @param context
* The evaluation context.
* @param input
* The input to the optimizer, consisting of a queryNode and
* input binding set.
*
* @return An instance of type QueryNodeWithBindingSet.
*/
QueryNodeWithBindingSet optimize(
AST2BOpContext context, QueryNodeWithBindingSet input);
}