/**
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
*/
package com.bigdata.bop.joinGraph.rto;
import com.bigdata.bop.IBindingSet;
/**
* A sample of a {@link Vertex} (an access path).
*/
public class VertexSample extends SampleBase {
/**
*
* Note: For a {@link Vertex}, the estimatedCardinality is the fast range
* count. This will be the same for each sample taken (assuming a read
* historical view or even a time scale of query which is significantly
* faster than update).
*
* @param estCard
* The estimated cardinality.
* @param limit
* The cutoff limit used to make that cardinality estimate.
* @param estimateEnum
* The type of estimate. For a vertex this should be
* {@link EstimateEnum#Exact} iff the sample is the fully
* materialized access path for that vertex and otherwise
* {@link EstimateEnum#Normal}.
* @param sample
* The sample.
*/
public VertexSample(final long estCard, final int limit,
final EstimateEnum estimateEnum, final IBindingSet[] sample) {
super(estCard, limit, estimateEnum, sample);
switch (estimateEnum) {
case Normal:
case Exact:
break;
default:
throw new IllegalArgumentException();
}
}
}