/*
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.apache.log4j.Logger;
import org.openrdf.model.Literal;
import org.openrdf.model.URI;
import org.openrdf.model.Value;
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.internal.XSD;
import com.bigdata.rdf.internal.impl.literal.AbstractLiteralIV;
import com.bigdata.rdf.model.BigdataLiteral;
import com.bigdata.rdf.model.BigdataValueFactory;
import com.bigdata.rdf.model.BigdataValueFactoryImpl;
import com.bigdata.rdf.sparql.ast.GlobalAnnotations;
/**
* Convert the {@link IV} to a <code>xsd:string</code>.
*/
public class XsdStrBOp extends IVValueExpression<IV>
implements INeedsMaterialization {
/**
*
*/
private static final long serialVersionUID = 3125106876006900339L;
private static final transient Logger log = Logger.getLogger(XsdStrBOp.class);
public XsdStrBOp(final IValueExpression<? extends IV> x, final GlobalAnnotations globals) {
this(new BOp[] { x }, anns(globals));
}
/**
* Required shallow copy constructor.
*/
public XsdStrBOp(final BOp[] args, final Map<String, Object> anns) {
super(args, anns);
if (args.length != 1 || args[0] == null)
throw new IllegalArgumentException();
if (getProperty(Annotations.NAMESPACE) == null)
throw new IllegalArgumentException();
}
/**
* Constructor required for {@link com.bigdata.bop.BOpUtility#deepCopy(FilterNode)}.
*/
public XsdStrBOp(final XsdStrBOp op) {
super(op);
}
public IV get(final IBindingSet bs) {
final IV iv = getAndCheckBound(0, bs);
if (log.isDebugEnabled()) {
log.debug(iv);
}
final Value val = asValue(iv);
if (log.isDebugEnabled()) {
log.debug(val);
}
// use to create my simple literals
final BigdataValueFactory vf = getValueFactory();
if (val instanceof Literal) {
final Literal lit = (Literal) val;
if (lit.getDatatype() != null && lit.getDatatype().equals(XSD.STRING)) {
// if xsd:string literal return it
return iv;
}
else {
// else return new xsd:string literal using Literal.getLabel
final BigdataLiteral str = vf.createLiteral(lit.getLabel(), XSD.STRING);
return super.asIV(str, bs);
}
} else if (val instanceof URI) {
// return new simple literal using URI label
final BigdataLiteral str = vf.createLiteral(val.stringValue(), XSD.STRING);
return super.asIV(str, bs);
} else {
throw new SparqlTypeErrorException();
}
// final IV iv = getAndCheckBound(0, bs);
//
// // use to create my simple literals
// final BigdataValueFactory vf = getValueFactory();
//
// if (iv.isInline() && !iv.isExtension()) {
// if(iv.isLiteral()){
// return super.asIV(vf.createLiteral(
// ((AbstractLiteralIV)iv).getLabel(), XSD.STRING), bs);
// }else{
// return super.asIV(vf.createLiteral(iv
// .getInlineValue().toString(), XSD.STRING), bs);
// }
// }
//
// if (iv.isURI()) {
// // return new xsd:string literal using URI label
// final URI uri = (URI) iv.getValue();
// final BigdataLiteral str = vf.createLiteral(uri.toString(), XSD.STRING);
// return super.asIV(str, bs);
// } else if (iv.isLiteral()) {
// final BigdataLiteral lit = (BigdataLiteral) iv.getValue();
// if (lit.getDatatype() != null && lit.getDatatype().equals(XSD.STRING)) {
// // if xsd:string literal return it
// return iv;
// }
// else {
// // else return new xsd:string literal using Literal.getLabel
// final BigdataLiteral str = vf.createLiteral(lit.getLabel(), XSD.STRING);
// return super.asIV(str, bs);
// }
// } else {
// throw new SparqlTypeErrorException();
// }
}
/**
* This bop can only work with materialized terms.
*/
public Requirement getRequirement() {
return INeedsMaterialization.Requirement.SOMETIMES;
}
}