org.apache.clerezza.rdf.jena.sparql.ResultSetWrapper Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of rdf.jena.sparql Show documentation

Allows executing SPARQL queries on SCB using the jena sparql engine.

The newest version!

/*
 * 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 org.apache.clerezza.rdf.jena.sparql;

import com.hp.hpl.jena.query.QuerySolution;
import com.hp.hpl.jena.query.ResultSet;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.apache.clerezza.rdf.core.sparql.SolutionMapping;

/**
 *
 * @author rbn
 */
public class ResultSetWrapper implements org.apache.clerezza.rdf.core.sparql.ResultSet {

    private final Iterator solutionsIter;
    private final List resultVars;


    public ResultSetWrapper(final ResultSet jenaResultSet) {
        final List solutions = new ArrayList();
        while (jenaResultSet.hasNext()) {
            solutions.add(jenaResultSet.nextSolution());
        }
        solutionsIter = solutions.iterator();
        resultVars = jenaResultSet.getResultVars();
    }

    @Override
    public boolean hasNext() {
        return solutionsIter.hasNext();
    }

    @Override
    public SolutionMapping next() {
        return new HashMapSolutionMapping(solutionsIter.next());
    }

    @Override
    public void remove() {
        throw new UnsupportedOperationException("Not supported yet.");
    }

    @Override
    public List getResultVars() {
    	return resultVars;
    }
}