/**
* Copyright (c) 2013, Institute of Information Systems (Sven Groppe and contributors of LUPOSDATE), University of Luebeck
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the
* following conditions are met:
*
* - Redistributions of source code must retain the above copyright notice, this list of conditions and the following
* disclaimer.
* - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other materials provided with the distribution.
* - Neither the name of the University of Luebeck nor the names of its contributors may be used to endorse or promote
* products derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package lupos.event.producer.rsssemantics;
import java.util.*;
import lupos.datastructures.items.Triple;
import lupos.datastructures.items.literal.Literal;
import lupos.event.communication.SerializingMessageService;
import lupos.event.producer.ProducerBase;
import lupos.event.producer.ProducerBaseNoDuplicates;
import lupos.event.util.Literals;
/**
* Main class
*/
public class RSSSemanticInterpretationProducer extends ProducerBaseNoDuplicates {
private static final String feedUrl = "http://www.abendblatt.de/politik/?service=Rss";
private static final int INTERVAL = 1000;
private static final String NAMESPACE = "http://localhost/events/RSSSemantics/";
static RSSReader reader = new RSSReader(feedUrl);
static Feed feed = reader.readFeed();
static StoplistReader stop = new StoplistReader();
static String stoplistpath = "/stoplist.txt";
static ArrayList<String>[] stoplist = stop.readStoplist(stoplistpath);
static MessageParser mparse = new MessageParser(stoplist);
static class Predicates {
public static final Literal FEED = Literals.createURI(NAMESPACE,
"FeedToInterpret");
public static final Literal INTERPRETATION = Literals.createURI(
NAMESPACE, "DBPediaResult");
}
public RSSSemanticInterpretationProducer(
SerializingMessageService msgService) {
super(msgService, INTERVAL);
}
public static void main(String[] args) throws Exception {
SerializingMessageService msgService = ProducerBase.connectToMaster();
RSSSemanticInterpretationProducer rt = new RSSSemanticInterpretationProducer(msgService);
rt.start();
rt.produce();
// Experimental: See Frequency.java for further information
// ArrayList<String> subtemp = nextMessage.getSubstring();
// ArrayList<Integer> freqimport = nextMessage.getFrequency();
}
/**
* Starts interpretation and database querying process for all messages in
* the feed, finally initiates triple creation and returns the list of
* triple lists to the broker.
*/
@Override
public List<List<Triple>> produceWithDuplicates() {
List<List<Triple>> result = new LinkedList<List<Triple>>();
for (FeedMessage message : feed.getMessages()) {
try {
DBAnswer nextMessage = mparse.parseMessage(message);
if (!(message.getDescription() == "")) {
ArrayList<Triple> preresult = message.generateTriples();
ArrayList<Triple> dbares;
if (!(nextMessage == null)) {
dbares = nextMessage.generateTriples();
if (!(dbares.isEmpty())) {
preresult.addAll(dbares);
}
}
result.add(preresult);
} else {
continue;
}
} catch (Exception e) {
System.out.println("Fail.");
e.printStackTrace();
}
}
return result;
}
}