01: /*
02: * WebSphinx web-crawling toolkit
03: *
04: * Copyright (c) 1998-2002 Carnegie Mellon University. All rights
05: * reserved.
06: *
07: * Redistribution and use in source and binary forms, with or without
08: * modification, are permitted provided that the following conditions
09: * are met:
10: *
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: *
14: * 2. Redistributions in binary form must reproduce the above copyright
15: * notice, this list of conditions and the following disclaimer in
16: * the documentation and/or other materials provided with the
17: * distribution.
18: *
19: * THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND
20: * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
21: * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY
23: * NOR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29: * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30: *
31: */
32:
33: package websphinx.workbench;
34:
35: import websphinx.*;
36:
37: public class URLPredicate implements LinkPredicate, PagePredicate {
38: Pattern pattern;
39:
40: public URLPredicate(Pattern pattern) {
41: this .pattern = pattern;
42: }
43:
44: public boolean equals(Object object) {
45: if (!(object instanceof URLPredicate))
46: return false;
47: URLPredicate p = (URLPredicate) object;
48: return p.pattern.equals(pattern);
49: }
50:
51: public Pattern getPattern() {
52: return pattern;
53: }
54:
55: public void connected(Crawler crawler) {
56: }
57:
58: public void disconnected(Crawler crawler) {
59: }
60:
61: public boolean shouldVisit(Link link) {
62: return pattern.found(link.getURL().toString());
63: }
64:
65: public boolean shouldActOn(Page page) {
66: try {
67: return pattern.found(page.getOrigin().getURL().toString());
68: } catch (NullPointerException e) {
69: return false;
70: }
71: }
72: }
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