/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package dev;
import org.apache.jena.larq.IndexBuilderModel;
import org.apache.jena.larq.IndexBuilderString;
import org.apache.jena.larq.LARQ;
import com.hp.hpl.jena.query.Dataset;
import com.hp.hpl.jena.query.Query;
import com.hp.hpl.jena.query.QueryExecution;
import com.hp.hpl.jena.query.QueryExecutionFactory;
import com.hp.hpl.jena.query.QueryFactory;
import com.hp.hpl.jena.query.ResultSet;
import com.hp.hpl.jena.query.ResultSetFormatter;
import com.hp.hpl.jena.rdf.model.Model;
import com.hp.hpl.jena.rdf.model.StmtIterator;
import com.hp.hpl.jena.sparql.algebra.Algebra;
import com.hp.hpl.jena.sparql.algebra.Op;
import com.hp.hpl.jena.tdb.TDBFactory;
import com.hp.hpl.jena.vocabulary.RDF;
public class Report_LARQ_TDB {
public static void main(String[] args) {
Dataset ds = TDBFactory.createDataset();
Model m = ds.getDefaultModel();
//Model m = ModelFactory.createDefaultModel();
//Dataset ds = DatasetFactory.create(m);
m.add(RDF.first, RDF.first, "text");
index(m);
Query q = QueryFactory.create(
"PREFIX pf: <http://jena.hpl.hp.com/ARQ/property#>" +
"" +
"select * where {" +
"?doc ?p ?lit ." +
"(?lit ?score ) pf:textMatch '+text' ." +
// "?x pf:versionARQ ?y ."+
"{} UNION { ?doc ?p ?lit .}" +
"}"
);
Op op = Algebra.compile(q) ;
op = Algebra.optimize(op) ;
System.out.println(op) ;
QueryExecution qe = QueryExecutionFactory.create(q, ds);
ResultSet res = qe.execSelect();
ResultSetFormatter.out(res);
qe.close();
}
public static void index(Model m) {
IndexBuilderModel larqBuilder = new IndexBuilderString();
//IndexBuilderModel larqBuilder = new IndexBuilderSubject();
StmtIterator iter = m.listStatements();
larqBuilder.indexStatements(iter);
larqBuilder.closeWriter();
LARQ.setDefaultIndex(larqBuilder.getIndex());
}
}