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.
33 import java.util.Iterator;
34 import java.util.List;
35 import java.util.Vector;
37 public class RSSAggregator {
38 private String orderBy;
39 private boolean orderReversed;
42 private String selectionField;
43 private Object selectionValue;
45 public RSSAggregator(int aCapacity, String anOrderBy, boolean anOrderReversed, String aSelectionField, Object aSelectionValue) {
47 orderReversed = anOrderReversed;
50 selectionValue = aSelectionValue;
51 selectionField = aSelectionField;
54 public void appendItems(List anItems) {
55 Iterator i = anItems.iterator();
58 Object item = i.next();
60 if (item instanceof RDFResource)
61 appendItem((RDFResource) item);
65 public int compareItems(RDFResource anItem1, RDFResource anItem2) {
68 Object value1 = anItem1.get(orderBy);
69 Object value2 = anItem2.get(orderBy);
71 if (value1 instanceof Comparable && value2 instanceof Comparable) {
72 result = ((Comparable) value1).compareTo(value2);
81 public void appendItem(RDFResource anItem) {
82 if (selectionField!=null && selectionValue!=null) {
83 if (!selectionValue.equals(anItem.get(selectionField)))
90 if (anItem.get(orderBy) == null)
93 while (i > 0 && compareItems(anItem, (RDFResource) items.get(i-1)) < 0) {
99 while (items.size()>0 && items.size()>capacity)
100 items.remove(items.size()-1);
103 public List getItems() {