/*
* 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.tdb.assembler;
import static com.hp.hpl.jena.sparql.util.graph.GraphUtils.*;
import static com.hp.hpl.jena.tdb.assembler.VocabTDB.*;
import org.apache.jena.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 <http://example/name> ;
// 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") ;
}
}