/*
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.constraint;
import java.util.Map;
import com.bigdata.bop.BOp;
import com.bigdata.bop.BOpBase;
import com.bigdata.bop.IBindingSet;
import com.bigdata.bop.IConstraint;
import com.bigdata.bop.IValueExpression;
import com.bigdata.bop.IValueExpressionConstraint;
/**
* {@link Constraint} wraps a {@link BooleanValueExpression}.
*/
public class Constraint<X> extends BOpBase implements
IValueExpressionConstraint<X> {
/**
*
*/
private static final long serialVersionUID = -9144690224260823279L;
// protected static final Logger log = Logger.getLogger(Constraint.class);
/**
* Convenience method to generate a constraint from a value expression.
*/
@SuppressWarnings("rawtypes")
public static IConstraint wrap(final BooleanValueExpression ve) {
return new Constraint(ve);
}
public Constraint(final BooleanValueExpression x) {
this(new BOp[] { x }, null/*annotations*/);
}
/**
* Required shallow copy constructor.
*/
public Constraint(final BOp[] args, final Map<String, Object> anns) {
super(args, anns);
if (args.length != 1 || args[0] == null)
throw new IllegalArgumentException();
}
/**
* Constructor required for {@link com.bigdata.bop.BOpUtility#deepCopy(FilterNode)}.
*/
public Constraint(final Constraint<X> op) {
super(op);
}
@Override
@SuppressWarnings("unchecked")
public IValueExpression<X> getValueExpression() {
return (IValueExpression<X>) get(0);
}
@Override
public boolean accept(final IBindingSet bs) {
// try {
// evaluate the BVE operator
return ((BooleanValueExpression) get(0)).get(bs);
// } catch (Throwable t) {
//
// if (InnerCause.isInnerCause(t, SparqlTypeErrorException.class)) {
//
// // trap the type error and filter out the solution
// if (log.isInfoEnabled())
// log.info("discarding solution due to type error: " + bs
// + " : " + t);
//
// return false;
//
// }
//
// throw new RuntimeException(t);
//
// }
}
}