/*
* 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.riot.lang;
import org.apache.jena.graph.Node ;
import org.apache.jena.graph.Triple ;
import org.apache.jena.riot.Lang ;
import org.apache.jena.riot.RDFLanguages ;
import org.apache.jena.riot.system.ParserProfile ;
import org.apache.jena.riot.system.StreamRDF ;
import org.apache.jena.riot.tokens.Token ;
import org.apache.jena.riot.tokens.TokenType ;
import org.apache.jena.riot.tokens.Tokenizer ;
import org.slf4j.Logger ;
import org.slf4j.LoggerFactory ;
/**
* N-Triples.
*
* @see <a href="http://www.w3.org/TR/n-triples/">http://www.w3.org/TR/n-triples/</a>
*/
public final class LangNTriples extends LangNTuple<Triple>
{
private static Logger messageLog = LoggerFactory.getLogger("N-Triples") ;
public LangNTriples(Tokenizer tokens,
ParserProfile profile,
StreamRDF dest)
{
super(tokens, profile, dest) ;
}
@Override
public Lang getLang() { return RDFLanguages.NTRIPLES ; }
/** Method to parse the whole stream of triples, sending each to the sink */
@Override
protected final void runParser()
{
while(hasNext())
{
Triple x = parseOne() ;
if ( x != null )
dest.triple(x) ;
}
}
@Override
protected final Triple parseOne()
{
Token sToken = nextToken() ;
if ( sToken.isEOF() )
exception(sToken, "Premature end of file: %s", sToken) ;
Token pToken = nextToken() ;
if ( pToken.isEOF() )
exception(pToken, "Premature end of file: %s", pToken) ;
Token oToken = nextToken() ;
if ( oToken.isEOF() )
exception(oToken, "Premature end of file: %s", oToken) ;
// Check in createTriple - but this is cheap so do it anyway.
checkIRIOrBNode(sToken) ;
checkIRI(pToken) ;
checkRDFTerm(oToken) ;
Token x = nextToken() ;
if ( x.getType() != TokenType.DOT )
exception(x, "Triple not terminated by DOT: %s", x) ;
// Node s = X ;
// Node p = X ;
// Node o = X ;
// return T ;
Node s = tokenAsNode(sToken) ;
Node p = tokenAsNode(pToken) ;
Node o = tokenAsNode(oToken) ;
return profile.createTriple(s, p, o, sToken.getLine(), sToken.getColumn()) ;
}
@Override
protected final Node tokenAsNode(Token token)
{
return profile.create(null, token) ;
}
}