/*
* 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 com.hp.hpl.jena.sparql.core.assembler ;
import java.util.List ;
import org.apache.jena.atlas.logging.Log ;
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.query.Dataset ;
import com.hp.hpl.jena.query.DatasetFactory ;
import com.hp.hpl.jena.rdf.model.Model ;
import com.hp.hpl.jena.rdf.model.RDFNode ;
import com.hp.hpl.jena.rdf.model.Resource ;
import com.hp.hpl.jena.sparql.core.DatasetGraph ;
import com.hp.hpl.jena.sparql.core.DatasetGraphFactory ;
import com.hp.hpl.jena.sparql.graph.GraphFactory ;
import com.hp.hpl.jena.sparql.util.FmtUtils ;
import com.hp.hpl.jena.sparql.util.graph.GraphUtils ;
public class DatasetAssembler extends AssemblerBase implements Assembler {
public static Resource getType() {
return DatasetAssemblerVocab.tDataset ;
}
@Override
public Object open(Assembler a, Resource root, Mode mode) {
Dataset ds = createDataset(a, root, mode) ;
return ds ;
}
public Dataset createDataset(Assembler a, Resource root, Mode mode) {
// Expanding version.
DatasetGraph dsg = DatasetGraphFactory.createMem() ;
AssemblerUtils.setContext(root, dsg.getContext()) ;
Dataset ds = DatasetFactory.create(dsg) ;
// -------- Default graph
// Can use ja:graph or ja:defaultGraph
Resource dftGraph = GraphUtils.getResourceValue(root, DatasetAssemblerVocab.pDefaultGraph) ;
if ( dftGraph == null )
dftGraph = GraphUtils.getResourceValue(root, DatasetAssemblerVocab.pGraph) ;
Model dftModel = null ;
if ( dftGraph != null )
dftModel = a.openModel(dftGraph) ;
else
// Assembler description did not define one - make a dummy.
dftModel = GraphFactory.makePlainModel() ;
ds.setDefaultModel(dftModel) ;
// -------- Named graphs
List<RDFNode> nodes = GraphUtils.multiValue(root, DatasetAssemblerVocab.pNamedGraph) ;
for ( RDFNode n : nodes )
{
if ( !( n instanceof Resource ) )
{
throw new DatasetAssemblerException( root, "Not a resource: " + FmtUtils.stringForRDFNode( n ) );
}
Resource r = (Resource) n;
String gName = GraphUtils.getAsStringValue( r, DatasetAssemblerVocab.pGraphName );
Resource g = GraphUtils.getResourceValue( r, DatasetAssemblerVocab.pGraph );
if ( g == null )
{
g = GraphUtils.getResourceValue( r, DatasetAssemblerVocab.pGraphAlt );
if ( g != null )
{
Log.warn( this, "Use of old vocabulary: use :graph not :graphData" );
}
else
{
throw new DatasetAssemblerException( root, "no graph for: " + gName );
}
}
Model m = a.openModel( g );
ds.addNamedModel( gName, m );
}
AssemblerUtils.setContext(root, ds.getContext()) ;
return ds ;
}
}