/*
* 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 org.apache.jena.fuseki.migrate;
import org.apache.jena.atlas.web.TypedInputStream ;
import org.apache.jena.fuseki.Fuseki ;
import org.apache.jena.riot.RDFDataMgr ;
import org.apache.jena.riot.system.StreamRDF ;
import org.apache.jena.riot.system.StreamRDFLib ;
import com.hp.hpl.jena.graph.Factory ;
import com.hp.hpl.jena.graph.Graph ;
import com.hp.hpl.jena.rdf.model.Model ;
import com.hp.hpl.jena.rdf.model.ModelFactory ;
/** A packaging of code to do a controlled read of a graph or model */
public class GraphLoadUtils
{
// ---- Model level
public static Model readModel(String uri, int limit)
{
Graph g = Factory.createGraphMem() ;
readUtil(g, uri, limit) ;
return ModelFactory.createModelForGraph(g) ;
}
public static void loadModel(Model model, String uri, int limit)
{
Graph g = model.getGraph() ;
readUtil(g, uri, limit) ;
}
// ---- Graph level
public static Graph readGraph(String uri, int limit)
{
Graph g = Factory.createGraphMem() ;
readUtil(g, uri, limit) ;
return g ;
}
public static void loadGraph(Graph g, String uri, int limit)
{
readUtil(g, uri, limit) ;
}
// ** Worker.
private static void readUtil(Graph graph, String uri, int limit)
{
// We need to do this ourselves, not via riot, to use the webStreamManager
StreamRDF sink = StreamRDFLib.graph(graph) ;
sink = new SinkRDFLimited(sink, limit) ;
TypedInputStream input = Fuseki.webStreamManager.open(uri) ;
RDFDataMgr.parse(sink, input, uri) ;
}
}