1 /**
2 * This file Copyright (c) 2008-2016 Magnolia International
3 * Ltd. (http://www.magnolia-cms.com). All rights reserved.
4 *
5 *
6 * This file is dual-licensed under both the Magnolia
7 * Network Agreement and the GNU General Public License.
8 * You may elect to use one or the other of these licenses.
9 *
10 * This file is distributed in the hope that it will be
11 * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
12 * implied warranty of MERCHANTABILITY or FITNESS FOR A
13 * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
14 * Redistribution, except as permitted by whichever of the GPL
15 * or MNA you select, is prohibited.
16 *
17 * 1. For the GPL license (GPL), you can redistribute and/or
18 * modify this file under the terms of the GNU General
19 * Public License, Version 3, as published by the Free Software
20 * Foundation. You should have received a copy of the GNU
21 * General Public License, Version 3 along with this program;
22 * if not, write to the Free Software Foundation, Inc., 51
23 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
24 *
25 * 2. For the Magnolia Network Agreement (MNA), this file
26 * and the accompanying materials are made available under the
27 * terms of the MNA which accompanies this distribution, and
28 * is available at http://www.magnolia-cms.com/mna.html
29 *
30 * Any modifications to this file must keep this entire header
31 * intact.
32 *
33 */
34 package info.magnolia.module.rssaggregator.importhandler;
35
36 import info.magnolia.module.rssaggregator.util.Assert;
37
38 /**
39 * A filter predicate that can be applied to a feed {@link com.sun.syndication.feed.synd.SyndFeed entry}.
40 * <p/>
41 * A filter predicate typically belongs to a {@link AggregateFilter} which in turn is defined for an {@link
42 * AggregateFeed}.
43 *
44 * @see AggregateFilter
45 * @see com.sun.syndication.feed.synd.SyndFeed
46 * @see AggregateFeed
47 */
48 public class FilterPredicate {
49
50 /**
51 * Conditions to aggregate predicates.
52 */
53 enum Condition {
54 AND, OR, NOT
55 }
56
57 private final Condition condition;
58 private final String property;
59 private final String regularExpression;
60
61 /**
62 * Create a new FilterPredicate for the given <code>condition</code>, <code>property</code> and
63 * <code>regularExpression</code>.
64 *
65 * @param condition the {@link Condition condition} for this predicate
66 * @param property the property of the feed this predicate applies to (eg. 'author')
67 * @param regularExpression the regular expression the value of the property should or should not match
68 */
69 public FilterPredicate(Condition condition, String property, String regularExpression) {
70 Assert.notNull(condition, "'condition' must not be null");
71 Assert.notBlank(property, "'property' must not be empty");
72 Assert.notBlank(regularExpression, "'regularExpression' must not be empty");
73 this.condition = condition;
74 this.property = property;
75 this.regularExpression = regularExpression;
76 }
77
78 /**
79 * Return the condition for this predicate.
80 *
81 * @return the condition for this predicate
82 */
83 public Condition getCondition() {
84 return condition;
85 }
86
87 /**
88 * Return the property of the feed this predicate applies to.
89 *
90 * @return the property of the feed this predicate applies to
91 */
92 public String getProperty() {
93 return property;
94 }
95
96 /**
97 * Return the regular expression for this predicate.
98 *
99 * @return the regular expression for this predicate
100 */
101 public String getRegularExpression() {
102 return regularExpression;
103 }
104
105 }