1 /* Copyright (C) 2003 Internet Archive.
2 *
3 * This file is part of the Heritrix web crawler (crawler.archive.org).
4 *
5 * Heritrix is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU Lesser Public License as published by
7 * the Free Software Foundation; either version 2.1 of the License, or
8 * any later version.
9 *
10 * Heritrix is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU Lesser Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser Public License
16 * along with Heritrix; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 *
19 * MemUURISet.java
20 * Created on Sep 15, 2003
21 *
22 * $Header$
23 */
24 package org.archive.crawler.util;
25
26
27 /***
28 * A UriUniqFilter that doesn't actually provide any uniqueness
29 * filter on presented items: all are passed through.
30 *
31 * @author gojomo
32 *
33 */
34 public class NoopUriUniqFilter
35 extends SetBasedUriUniqFilter {
36
37 protected synchronized boolean setAdd(CharSequence uri) {
38 return true; // always consider as new
39 }
40 protected synchronized boolean setRemove(CharSequence uri) {
41 return true; // always consider as succeeded
42 }
43 protected synchronized long setCount() {
44 return -1; // return nonsense value
45 }
46
47 /* (non-Javadoc)
48 * @see org.archive.crawler.util.UriUniqFilterImpl#createUriSet()
49 */
50 protected void createUriSet() {
51 // do nothing
52 }
53
54 }