myenginefactory.java

Jena推理机

/*
 * (c) Copyright 2005, 2006, 2007 Hewlett-Packard Development Company, LP
 * All rights reserved.
 * [See end of file]
 */

package arq.examples.ext;

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.engine.QueryEngineFactory;
import com.hp.hpl.jena.query.engine.QueryEngineRegistry;

/**
 * Example factory for an extension query engine 
 * 
 * @author Andy Seaborne
 * @version $Id: MyEngineFactory.java,v 1.4 2007/01/02 11:53:35 andy_seaborne Exp $
 */

public class MyEngineFactory implements QueryEngineFactory 
{
    /** Register with the global query engine registry */
    public static void register()
    {
        register(QueryEngineRegistry.get()) ;
    }
    
    /** Register with some specific query engine registry */
    public static void register(QueryEngineRegistry registry)
    {
        registry.add(new MyEngineFactory()) ;
    }
    
    public boolean accept(Query query, Dataset dataset)
    {
        return true ;
    }

    public QueryExecution create(Query query, Dataset dataset)
    {
        MyQueryEngine qe = new MyQueryEngine(query) ;
        if ( dataset != null )
            qe.setDataset(dataset) ;
        return qe ;
    }

}

/*
 * (c) Copyright 2005, 2006, 2007 Hewlett-Packard Development Company, LP
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */