/**
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 15, 2016
*/
package com.bigdata.rdf.sparql.ast.hints;
import com.bigdata.bop.engine.IChunkHandler;
import com.bigdata.bop.engine.ManagedHeapStandloneChunkHandler;
import com.bigdata.bop.engine.NativeHeapStandloneChunkHandler;
/**
* Type safe enumeration of known {@link IChunkHandler} implementations in
* support of the {@link QueryEngineChunkHandlerQueryHint}.
*
* @author bryan
*
* @see BLZG-533 (Vector query engine on the native heap)
*/
public enum QueryEngineChunkHandlerEnum {
/**
* Use the managed object heap (this is the historical behavior).
*/
Managed,
/**
* Use the native heap.
*/
Native;
/**
* Return the type safe enumeration corresponding to a specific
* implementation class.
*
* @param cls
* The {@link IChunkHandler} implementation class.
*
* @return The corresponding type safe enum value.
*/
public static QueryEngineChunkHandlerEnum valueOf(Class<? extends IChunkHandler> cls) {
if (NativeHeapStandloneChunkHandler.class.getName().equals(cls.getName())) {
return QueryEngineChunkHandlerEnum.Native;
} else if (ManagedHeapStandloneChunkHandler.class.getName().equals(cls.getName())) {
return QueryEngineChunkHandlerEnum.Managed;
} else {
throw new IllegalArgumentException(cls.getName());
}
}
}