modelsourceassembler.java

Jena推理机

/*
 	(c) Copyright 2005, 2006, 2007 Hewlett-Packard Development Company, LP
 	All rights reserved - see end of file.
 	$Id: ModelSourceAssembler.java,v 1.8 2007/01/02 11:52:55 andy_seaborne Exp $
*/

package com.hp.hpl.jena.assembler.assemblers;

import com.hp.hpl.jena.assembler.*;
import com.hp.hpl.jena.rdf.model.*;
import com.hp.hpl.jena.rdf.model.impl.MemoryModelGetter;
import com.hp.hpl.jena.vocabulary.RDF;

public class ModelSourceAssembler extends AssemblerBase
    {
    public Object open( Assembler a, Resource root, Mode irrelevant )
        {
        checkType( root, JA.ModelSource );
        return root.hasProperty( RDF.type, JA.RDBModelSource )
             ? (ModelGetter) createRDBGetter( getConnection( a, root ) )
            : new MemoryModelGetter()
            ; 
        }

    protected  ModelGetter createRDBGetter( ConnectionDescription c )
        { return ModelFactory.createModelRDBMaker( c.getConnection() ); }

    private ConnectionDescription getConnection( Assembler a, Resource root )
        { return (ConnectionDescription) a.open( getRequiredResource( root, JA.connection ) ); }
    }


/*
 * (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.
*/