/**
* 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 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.graph.Node ;
import com.hp.hpl.jena.query.DatasetFactory ;
import com.hp.hpl.jena.rdf.model.Resource ;
import com.hp.hpl.jena.sparql.core.DatasetGraph ;
import com.hp.hpl.jena.sparql.expr.NodeValue ;
import com.hp.hpl.jena.sparql.modify.GraphStoreNull ;
import com.hp.hpl.jena.sparql.modify.GraphStoreNullTransactional ;
public class DatasetNullAssembler extends AssemblerBase implements Assembler
{
public static Resource getType() { return DatasetAssemblerVocab.tDatasetNull ; }
@Override
public Object open(Assembler a, Resource root, Mode mode)
{
boolean transactional = true;
if (root.hasProperty(DatasetAssemblerVocab.pTransactional))
{
Node b = root.getProperty(DatasetAssemblerVocab.pTransactional).getObject().asNode();
NodeValue nv = NodeValue.makeNode(b);
if (nv.isBoolean())
{
transactional = nv.getBoolean();
}
else
{
Log.warn(DatasetNullAssembler.class,
"Failed to recognize value for transactional setting (ignored): " + b);
}
}
DatasetGraph dsg = transactional ? new GraphStoreNullTransactional() : new GraphStoreNull();
return DatasetFactory.create(dsg) ;
}
}