/*
* 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 java.io.InputStream ;
import org.apache.jena.fuseki.Fuseki ;
import org.openjena.atlas.lib.Sink ;
import org.openjena.riot.Lang ;
import org.openjena.riot.RiotException ;
import org.openjena.riot.RiotReader ;
import org.openjena.riot.lang.LangRIOT ;
import org.openjena.riot.lang.SinkTriplesToGraph ;
import com.hp.hpl.jena.graph.Factory ;
import com.hp.hpl.jena.graph.Graph ;
import com.hp.hpl.jena.graph.Triple ;
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)
{
Lang lang = Lang.guess(uri, Lang.RDFXML) ;
Sink<Triple> sink = new SinkTriplesToGraph(graph) ;
sink = new SinkLimited<Triple>(sink, limit) ;
// TODO Conneg - awaiting RIOT code upgrade.
InputStream input = Fuseki.webFileManager.open(uri) ;
LangRIOT parser = RiotReader.createParserTriples(input, lang, uri, sink) ;
try {
parser.parse() ;
} catch (RiotException ex) { throw ex ; }
}
}