/*
* 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 arq.examples.riot;
import java.io.FileInputStream ;
import java.io.FileNotFoundException ;
import java.io.InputStream ;
import org.apache.jena.riot.RDFLanguages ;
import org.apache.jena.riot.RiotReader ;
import org.apache.jena.riot.lang.LangRIOT ;
import org.apache.jena.riot.system.* ;
/** Example of using RIOT directly.
*
* RDFDataMgr is the general place to read data - see {@link ExRIOT_1}
*
* RiotReader is the place for making parsers and can be used to read
* from files or InputStreams. It can give more detailed control of error handling
* and specialised destination of parser output.
* It does not perform HTTP content negotiation.
*/
public class ExRIOT_2
{
public static void main(String...argv) throws FileNotFoundException
{
// ---- Parse to a Sink.
StreamRDF noWhere = StreamRDFLib.sinkNull() ;
// RIOT controls the conversion from bytes to java chars.
InputStream in = new FileInputStream("data.trig") ;
// Better is:
// RDFDataMgr.parse(noWhere, in, "http://example/base", RDFLanguages.TRIG, null) ;
RiotReader.parse(in, RDFLanguages.TRIG, "http://example/base", noWhere) ;
// --- Or create a parser and do the parsing as separate steps.
String baseURI = "http://example/base" ;
// It is always better to use an InputStream, rather than a Java Reader.
// The parsers will do the necessary character set conversion.
in = new FileInputStream("data.trig") ;
LangRIOT parser = RiotReader.createParser(in, RDFLanguages.TRIG, "http://example/base", noWhere) ;
// Access the setup of the RIOT built-in parsers.
// Parser to first error or warning.
ErrorHandler errHandler = ErrorHandlerFactory.errorHandlerStrict ;
// Now enable stricter checking, even N-TRIPLES must have absolute URIs.
ParserProfile profile = RiotLib.profile(baseURI, true, true, errHandler) ;
// Just set the error handler.
parser.getProfile().setHandler(errHandler) ;
// Or replace the whole parser profile.
parser.setProfile(profile) ;
// Do the work.
parser.parse() ;
}
}