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 the com.oreilly.servlet library, any library
22 * licensed under the Apache Software License, The Sun (tm) Java Advanced
23 * Imaging library (JAI), The Sun JIMI library (or with modified versions of
24 * the above that use the same license as the above), and distribute linked
25 * combinations including the two. You must obey the GNU General Public
26 * License in all respects for all of the code used other than the above
27 * mentioned libraries. If you modify this file, you may extend this exception
28 * to your version of the file, but you are not obligated to do so. If you do
29 * not wish to do so, delete this exception statement from your version.
36 public class RSSAggregator {
37 private String orderBy;
38 private boolean orderReversed;
41 private String selectionField;
42 private Object selectionValue;
44 public RSSAggregator(int aCapacity, String anOrderBy, boolean anOrderReversed, String aSelectionField, Object aSelectionValue) {
46 orderReversed = anOrderReversed;
49 selectionValue = aSelectionValue;
50 selectionField = aSelectionField;
53 public void appendItems(List anItems) {
54 Iterator i = anItems.iterator();
57 Object item = i.next();
59 if (item instanceof RDFResource)
60 appendItem((RDFResource) item);
64 public int compareItems(RDFResource anItem1, RDFResource anItem2) {
67 Object value1 = anItem1.get(orderBy);
68 Object value2 = anItem2.get(orderBy);
70 if (value1 instanceof Comparable && value2 instanceof Comparable) {
71 result = ((Comparable) value1).compareTo(value2);
80 public void appendItem(RDFResource anItem) {
81 if (selectionField!=null && selectionValue!=null) {
82 if (!selectionValue.equals(anItem.get(selectionField)))
89 if (anItem.get(orderBy) == null)
92 while (i > 0 && compareItems(anItem, (RDFResource) items.get(i-1)) < 0) {
98 while (items.size()>0 && items.size()>capacity)
99 items.remove(items.size()-1);
102 public List getItems() {