001/*
002 * Copyright 2015 DuraSpace, Inc.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016package org.fcrepo.kernel.api;
017
018import java.util.stream.Collector;
019
020import com.hp.hpl.jena.rdf.model.ModelFactory;
021import com.hp.hpl.jena.graph.Triple;
022import com.hp.hpl.jena.rdf.model.Model;
023
024/**
025 * A class of Collectors for use with RdfStreams
026 * @author acoburn
027 * @since Dec 4, 2015
028 */
029public class RdfCollectors {
030
031    /**
032     * @return a Collector for use with aggregating an RdfStream into a Model.
033     */
034    public static Collector<Triple, ?, Model> toModel() {
035        return Collector.of(ModelFactory::createDefaultModel,
036            (m, t) -> m.add(m.asStatement(t)),
037            (left, right) -> { left.add(right); return left; },
038            Collector.Characteristics.UNORDERED);
039    }
040
041    private RdfCollectors() {
042        // prevent instantiation
043    }
044}
045