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Trippi RDF SPI implementation using SPARQL over HTTP
There is a newer version: 1.2
/*
 * Copyright 2015-2016 Smithsonian Institution.
 *
 * Licensed 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/
 *
 * This software and accompanying documentation is supplied without
 * warranty of any kind. The copyright holder and the Smithsonian Institution:
 * (1) expressly disclaim any warranties, express or implied, including but not
 * limited to any implied warranties of merchantability, fitness for a
 * particular purpose, title or non-infringement; (2) do not assume any legal
 * liability or responsibility for the accuracy, completeness, or usefulness of
 * the software; (3) do not represent that use of the software would not
 * infringe privately owned rights; (4) do not warrant that the software
 * is error-free or will be maintained, supported, updated or enhanced;
 * (5) will not be liable for any indirect, incidental, consequential special
 * or punitive damages of any kind or nature, including but not limited to lost
 * profits or loss of data, on any basis arising from contract, tort or
 * otherwise, even if any of the parties has been warned of the possibility of
 * such loss or damage.
 *
 * This distribution includes several third-party libraries, each with their own
 * license terms. For a complete copy of all copyright and license terms, including
 * those of third-party libraries, please see the product release notes.
 *
 */

package edu.si.trippi.impl.sparql;

import static org.apache.jena.query.QueryExecutionFactory.sparqlService;
import static org.apache.jena.update.UpdateExecutionFactory.createRemote;

import org.apache.jena.graph.Node;
import org.trippi.impl.base.TriplestoreSessionFactory;

/**
 * A {@link TriplestoreSessionFactory} using SPARQL Update.
 *
 * @author A. Soroka
 */
public class SparqlSessionFactory implements TriplestoreSessionFactory {

    static final String[] LANGUAGES = new String[] {"SPARQL"};

    private final String updateEndpoint, queryEndpoint, constructEndpoint;

    private Node graphName;
    
    /**
     * Full constructor.
     *
     * @param updateEndpoint the SPARQL Update endpoint against which to act
     * @param queryEndpoint the SPARQL Query endpoint against which to act for non-CONSTRUCT queries
     * @param constructEndpoint the SPARQL Query endpoint against which to act for CONSTRUCT queries
     */
    public SparqlSessionFactory(final String updateEndpoint, final String queryEndpoint,
            final String constructEndpoint, final Node gN) {
        this.updateEndpoint = updateEndpoint;
        this.queryEndpoint = queryEndpoint;
        this.constructEndpoint = constructEndpoint;
        this.graphName = gN;
    }

    @Override
    public SparqlSession newSession() {
        return new SparqlSession(u -> createRemote(u, updateEndpoint).execute(), q -> sparqlService(queryEndpoint, q)
                .execSelect(), c -> sparqlService(constructEndpoint, c).execConstruct(), graphName);
    }

    @Override
    public String[] listTripleLanguages() {
        return LANGUAGES;
    }

    @Override
    public String[] listTupleLanguages() {
        return LANGUAGES;
    }

    @Override
    public void close() {
        // NO OP
    }

}