/**
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.rdf.internal.constraints;
import java.util.Map;
import org.openrdf.model.Literal;
import com.bigdata.bop.BOp;
import com.bigdata.bop.IBindingSet;
import com.bigdata.bop.IValueExpression;
import com.bigdata.bop.NV;
import com.bigdata.rdf.error.SparqlTypeErrorException;
import com.bigdata.rdf.internal.IV;
import com.bigdata.rdf.model.BigdataLiteral;
import com.bigdata.rdf.sparql.ast.GlobalAnnotations;
public class StrlangBOp extends IVValueExpression<IV> implements INeedsMaterialization {
private static final long serialVersionUID = 4227610629554743647L;
public StrlangBOp(IValueExpression<? extends IV> x, IValueExpression<? extends IV> dt,
final GlobalAnnotations globals) {
this(new BOp[] { x, dt }, anns(globals));
}
public StrlangBOp(BOp[] args, Map<String, Object> anns) {
super(args, anns);
if (args.length != 2 || args[0] == null || args[1] == null)
throw new IllegalArgumentException();
}
public StrlangBOp(StrlangBOp op) {
super(op);
}
@Override
public Requirement getRequirement() {
return Requirement.SOMETIMES;
}
@Override
public IV get(final IBindingSet bs) throws SparqlTypeErrorException {
final Literal lit = getAndCheckLiteralValue(0, bs);
if (lit.getDatatype() != null || lit.getLanguage() != null) {
throw new SparqlTypeErrorException();
}
final Literal l = getAndCheckLiteralValue(1, bs);
String label = lit.getLabel();
String langLit = l.getLabel();
final BigdataLiteral str = getValueFactory().createLiteral(label, langLit);
return super.asIV(str, bs);
}
}