/*
 * 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
 *
 *   https://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.
 *
 *   SPDX-License-Identifier: Apache-2.0
 */

package org.apache.jena.riot.system;

import org.apache.jena.graph.Triple ;
import org.apache.jena.sparql.core.Quad ;

/** Take one item from a StreamRDF and present as a StreamRowRDF
 *  @see StreamRDF
 *  @see StreamRowRDF
 */
public class StreamRDFCollectOne implements StreamRDF {
    StreamRowRDF row = null ;
    private final PrefixMap pmap ;
    public StreamRDFCollectOne() {
        pmap = PrefixMapFactory.create() ;
    }

    public StreamRDFCollectOne(PrefixMap pmap) {
        this.pmap = pmap ;
    }

    @Override
    public void start() {}

    @Override
    public void triple(Triple triple) {
        row = new StreamRowRDFBase(triple) ;
    }

    @Override
    public void quad(Quad quad) {
        row = new StreamRowRDFBase(quad) ;
    }

    @Override
    public void base(String base) {}

    @Override
    public void prefix(String prefix, String iri) {
        row = null ;
        pmap.add(prefix, iri) ;
    }

    @Override
    public void version(String version) {}

    @Override
    public void finish() {}

    public StreamRowRDF getRow() {
        return row ;
    }
}
