001/*
002 * Licensed to DuraSpace under one or more contributor license agreements.
003 * See the NOTICE file distributed with this work for additional information
004 * regarding copyright ownership.
005 *
006 * DuraSpace licenses this file to you under the Apache License,
007 * Version 2.0 (the "License"); you may not use this file except in
008 * compliance with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.fcrepo.event.serialization;
019
020import java.io.ByteArrayOutputStream;
021import java.io.UnsupportedEncodingException;
022
023import org.apache.jena.rdf.model.Model;
024import org.fcrepo.kernel.api.exception.RepositoryRuntimeException;
025import org.fcrepo.kernel.api.observer.FedoraEvent;
026
027/**
028 * Serialize a FedoraEvent as Turtle
029 * @author acoburn
030 * @since 6/16/16
031 */
032public class TurtleSerializer implements EventSerializer {
033
034    /**
035     * Serialize a FedoraEvent in RDF using Turtle syntax
036     * @param evt the Fedora event
037     * @return a string of RDF, using Turtle syntax
038     */
039    @Override
040    public String serialize(final FedoraEvent evt) {
041        try {
042            final Model model = EventSerializer.toModel(evt);
043            final ByteArrayOutputStream out = new ByteArrayOutputStream();
044            model.write(out, "TTL");
045            return out.toString("UTF-8");
046        } catch (final UnsupportedEncodingException ex) {
047            throw new RepositoryRuntimeException(ex);
048        }
049    }
050}