/*
* 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.sdb.store;
import java.util.Iterator ;
import org.apache.jena.atlas.lib.Closeable ;
import com.hp.hpl.jena.graph.Graph ;
import com.hp.hpl.jena.graph.Node ;
import com.hp.hpl.jena.query.Dataset ;
import com.hp.hpl.jena.query.DatasetFactory ;
import com.hp.hpl.jena.sdb.Store ;
import com.hp.hpl.jena.sdb.graph.GraphSDB ;
import com.hp.hpl.jena.sdb.util.StoreUtils ;
import com.hp.hpl.jena.shared.Lock ;
import com.hp.hpl.jena.shared.LockMRSW ;
import com.hp.hpl.jena.sparql.core.DatasetGraph ;
import com.hp.hpl.jena.sparql.core.DatasetGraphCaching ;
import com.hp.hpl.jena.sparql.core.Quad ;
import com.hp.hpl.jena.sparql.util.Context ;
import com.hp.hpl.jena.update.GraphStore ;
public class DatasetStoreGraph extends DatasetGraphCaching
implements DatasetGraph, Closeable, GraphStore
{
private final Store store ;
private Lock lock = new LockMRSW() ;
private final Context context ;
public DatasetStoreGraph(Store store, Context context)
{
this(store, null, context) ;
}
public DatasetStoreGraph(Store store, GraphSDB graph, Context context)
{
this.store = store ;
// Force the "default" graph
this.defaultGraph = graph ;
this.context = context ;
}
public Store getStore() { return store ; }
@Override
public Iterator<Node> listGraphNodes()
{
return StoreUtils.storeGraphNames(store) ;
}
//---- Update
@Override
public void startRequest()
{}
@Override
public void finishRequest()
{}
@Override
public Dataset toDataset()
{ return DatasetFactory.create(this) ; }
@Override
protected boolean _containsGraph(Node graphNode)
{
return StoreUtils.containsGraph(store, graphNode) ;
}
@Override
protected Graph _createDefaultGraph()
{
return new GraphSDB(store) ;
}
@Override
protected Graph _createNamedGraph(Node graphNode)
{
return new GraphSDB(store, graphNode) ;
}
// Use unsubtle helper versions (the bulk loader copes with large additions).
@Override
protected void addToDftGraph(Node s, Node p, Node o)
{ Helper.addToDftGraph(this, s, p, o) ; }
@Override
protected void addToNamedGraph(Node g, Node s, Node p, Node o)
{ Helper.addToNamedGraph(this, g, s, p, o) ; }
@Override
protected void deleteFromDftGraph(Node s, Node p, Node o)
{ Helper.deleteFromDftGraph(this, s, p, o) ; }
@Override
protected void deleteFromNamedGraph(Node g, Node s, Node p, Node o)
{ Helper.deleteFromNamedGraph(this, g, s, p, o) ; }
@Override
protected Iterator<Quad> findInDftGraph(Node s, Node p, Node o)
{ return Helper.findInDftGraph(this, s, p, o) ; }
@Override
protected Iterator<Quad> findInAnyNamedGraphs(Node s, Node p, Node o)
{ return Helper.findInAnyNamedGraphs(this, s, p, o) ; }
@Override
protected Iterator<Quad> findInSpecificNamedGraph(Node g, Node s, Node p, Node o)
{ return Helper.findInSpecificNamedGraph(this, g, s, p, o) ; }
@Override
protected void _close()
{ store.close() ; }
}