/*
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 Apr 23, 2009
*/
package com.bigdata.service;
import java.util.concurrent.Callable;
/**
* Base class for {@link IFederationCallable}.
*
* @author <a href="mailto:thompsonbry@users.sourceforge.net">Bryan Thompson</a>
* @version $Id$
*/
abstract public class FederationCallable<T> implements IFederationCallable,
Callable<T> {
private transient IBigdataFederation<?> fed;
/**
* Deserialization ctor.
*/
public FederationCallable() {
}
synchronized public void setFederation(final IBigdataFederation<?> fed) {
if (fed == null)
throw new IllegalArgumentException();
if (this.fed != null && this.fed != fed)
throw new IllegalStateException();
this.fed = fed;
}
public IBigdataFederation<?> getFederation() {
if (fed == null)
throw new IllegalStateException();
return fed;
}
}