com.hp.hpl.jena.tdb.assembler.TDBGraphAssembler Maven / Gradle / Ivy

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TDB is a storage subsystem for Jena and ARQ
There is a newer version: 0.8.10
/*
 * (c) Copyright 2008, 2009 Hewlett-Packard Development Company, LP
 * All rights reserved.
 * [See end of file]
 */

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

import static com.hp.hpl.jena.sparql.util.graph.GraphUtils.*;
import static com.hp.hpl.jena.tdb.assembler.VocabTDB.*;
import org.openjena.atlas.logging.Log ;


import com.hp.hpl.jena.query.Dataset;
import com.hp.hpl.jena.rdf.model.*;

import com.hp.hpl.jena.assembler.Assembler;
import com.hp.hpl.jena.assembler.Mode;
import com.hp.hpl.jena.assembler.assemblers.AssemblerBase;
import com.hp.hpl.jena.assembler.exceptions.AssemblerException;

import com.hp.hpl.jena.tdb.TDB;
import com.hp.hpl.jena.tdb.TDBException;
import com.hp.hpl.jena.tdb.TDBFactory;
import com.hp.hpl.jena.tdb.assembler.IndexAssembler;
import com.hp.hpl.jena.tdb.base.file.Location;
import com.hp.hpl.jena.tdb.lib.NodeFmtLib ;

public class TDBGraphAssembler extends AssemblerBase implements Assembler
{
    static IndexAssembler indexAssembler = null ; 
    
    @Override
    public Model open(Assembler a, Resource root, Mode mode)
    {
        // In case we go via explicit index construction,
        // although given we got here, the assembler is wired in
        // and that probably means TDB.init
        TDB.init() ;
        
        // Make a model - the default model of the TDB dataset
        // [] rdf:type tdb:GraphTDB ;
        //    tdb:location "dir" ;
        
        // Make a named model.
        // [] rdf:type tdb:GraphTDB ;
        //    tdb:location "dir" ;
        //    tdb:graphName  ;

        // Location or dataset reference.
        String locationDir = getStringValue(root, pLocation) ;
        Resource dataset = getResourceValue(root, pDataset) ;
        
        if ( locationDir != null && dataset != null )
            throw new AssemblerException(root, "Both location and dataset given: exactly one required") ; 
        
        if ( locationDir == null && dataset == null )
            throw new AssemblerException(root, "Must give location or refer to a dataset description") ;
        
        String graphName = null ;
        if ( root.hasProperty(pGraphName1) )
            graphName = getAsStringValue(root, pGraphName1) ;
        if ( root.hasProperty(pGraphName2) )
            graphName = getAsStringValue(root, pGraphName2) ;

        if ( root.hasProperty(pIndex) )
            Log.warn(this, "Custom indexes not implemented yet - ignored") ;

        final Dataset ds ;
        
        if ( locationDir != null )
        {
            Location location = new Location(locationDir) ;
            ds = TDBFactory.createDataset(location) ;
        }
        else
            ds = DatasetAssemblerTDB.make(dataset) ;

        try {
        
        if ( graphName != null )
            return ds.getNamedModel(graphName) ;
        else
            return ds.getDefaultModel() ;
        
        } catch (RuntimeException ex)
        {
            ex.printStackTrace(System.err) ;
            throw ex ;
        }
    }
    
    //@Unused
    private void indexes(Resource root)
    {
        // ---- API ways

        StmtIterator sIter = root.listProperties(pIndex) ;
        while(sIter.hasNext())
        {
            RDFNode obj = sIter.nextStatement().getObject() ;
            if ( obj.isLiteral() )
            {
                String desc = ((Literal)obj).getString() ;
                System.out.printf("Index: %s\n", desc) ; System.out.flush();
                continue ;
            }
            throw new TDBException("Wrong format for tdb:index: should be a string: found: "+NodeFmtLib.displayStr(obj)) ; 
            //          Resource x = (Resource)obj ;
            //          String desc = x.getProperty(pDescription).getString() ;
            //          String file = x.getProperty(pFile).getString() ;
            //          System.out.printf("Index: %s in file %s\n", desc, file) ; System.out.flush();
        }

        System.out.flush();
        throw new TDBException("Custom indexes turned off") ; 
    }

}

/*
 * (c) Copyright 2008, 2009 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.
 */