/**
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 Oct 22, 2015
*/
package com.bigdata.rdf.sparql.ast.hints;
import com.bigdata.bop.PipelineOp;
import com.bigdata.bop.join.PipelineJoin.Annotations;
import com.bigdata.rdf.sparql.ast.ASTBase;
import com.bigdata.rdf.sparql.ast.IQueryNode;
import com.bigdata.rdf.sparql.ast.QueryRoot;
import com.bigdata.rdf.sparql.ast.eval.AST2BOpContext;
/**
* Sets the {@link PipelineOp.Annotations#MIN_DATAPOINTS_PER_TASK} annotation of an operator.
*
* @author <a href="mailto:ms@metaphacts.com">Michael Schmidt</a>
* @version $Id$
*/
final class MinDatapointsPerTaskHint extends AbstractIntQueryHint {
protected MinDatapointsPerTaskHint() {
super(Annotations.MIN_DATAPOINTS_PER_TASK,
Annotations.DEFAULT_MIN_DATAPOINTS_PER_TASK);
}
@Override
public void handle(final AST2BOpContext context, final QueryRoot queryRoot,
final QueryHintScope scope, final ASTBase op, final Integer value) {
if (op instanceof IQueryNode) {
/*
* Note: This is set on the queryHint Properties object and then
* transferred to the pipeline operator when it is generated.
*/
_setQueryHint(context, scope, op, getName(), value);
}
}
}