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Java > Open Source Codes > org > archive > crawler > util > NoopUriUniqFilter


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: /cvsroot/archive-crawler/ArchiveOpenCrawler/src/java/org/archive/crawler/util/NoopUriUniqFilter.java,v 1.1.14.1 2007/01/13 01:31:30 stack-sf Exp $
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 JavaDoc uri) {
38         return true; // always consider as new
39
}
40     protected synchronized boolean setRemove(CharSequence JavaDoc 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 }
55
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