2 * Copyright (C) 2001, 2002 The Mir-coders group
4 * This file is part of Mir.
6 * Mir is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * Mir is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with Mir; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 * In addition, as a special exception, The Mir-coders gives permission to link
21 * the code of this program with any library licensed under the Apache Software License,
22 * The Sun (tm) Java Advanced Imaging library (JAI), The Sun JIMI library
23 * (or with modified versions of the above that use the same license as the above),
24 * and distribute linked combinations including the two. You must obey the
25 * GNU General Public License in all respects for all of the code used other than
26 * the above mentioned libraries. If you modify this file, you may extend this
27 * exception to your version of the file, but you are not obligated to do so.
28 * If you do not wish to do so, delete this exception statement from your version.
32 import java.util.List;
35 import mir.log.LoggerWrapper;
36 import mir.rss.RSSAggregator;
37 import mir.util.ExceptionRoutines;
38 import mir.util.ParameterExpander;
40 public class RDFAggregatorProducerNode extends AbstractProducerNode {
42 private String source;
44 public RDFAggregatorProducerNode(String aKey, String aSource) {
49 public void produce(Map aValueMap, String aVerb, LoggerWrapper aLogger) throws ProducerFailure {
51 aLogger.debug(source);
52 String evaluatedKey = ParameterExpander.expandExpression( aValueMap, key );
53 Object evaluatedSource = ParameterExpander.evaluateExpression( aValueMap, source );
55 Object aggregator = aValueMap.get(evaluatedKey);
57 if (aggregator == null) {
58 aLogger.debug("creating");
59 aggregator = new RSSAggregator(100, "dc:date", true, null, null);
60 aValueMap.put(evaluatedKey, aggregator);
63 if (aggregator instanceof RSSAggregator) {
64 RSSAggregator agg = (RSSAggregator) aggregator;
66 if (evaluatedSource instanceof List) {
67 aLogger.debug("appending");
68 agg.appendItems( (List) evaluatedSource);
69 aLogger.debug("now: " + agg.getItems().size());
72 throw new ProducerExc("List expected, " + evaluatedSource.toString() + " found");
75 throw new ProducerExc("RSSAggregator expected, " + aggregator.toString() + " found");
78 Throwable s = ExceptionRoutines.traceCauseException(t);
79 aLogger.error("Error while aggregating RDF data: " + s.getClass().getName()+","+ s.getMessage());