1 /*
2 * ====================================================================
3 *
4 * The Apache Software License, Version 1.1
5 *
6 * Copyright (c) 2003 Nick Lothian. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in
17 * the documentation and/or other materials provided with the
18 * distribution.
19 *
20 * 3. The end-user documentation included with the redistribution, if
21 * any, must include the following acknowlegement:
22 * "This product includes software developed by the
23 * developers of Classifier4J (http://classifier4j.sf.net/)."
24 * Alternately, this acknowlegement may appear in the software itself,
25 * if and wherever such third-party acknowlegements normally appear.
26 *
27 * 4. The name "Classifier4J" must not be used to endorse or promote
28 * products derived from this software without prior written
29 * permission. For written permission, please contact
30 * http://sourceforge.net/users/nicklothian/.
31 *
32 * 5. Products derived from this software may not be called
33 * "Classifier4J", nor may "Classifier4J" appear in their names
34 * without prior written permission. For written permission, please
35 * contact http://sourceforge.net/users/nicklothian/.
36 *
37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
40 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
41 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
42 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
43 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
44 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
45 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
46 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
47 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
48 * SUCH DAMAGE.
49 * ====================================================================
50 */
51
52 package net.sf.classifier4J.bayesian;
53
54 /***
55 * Interface used by BayesianClassifier to determine the probability of each word.
56 *
57 * @author Nick Lothian
58 * @author Peter Leschev
59 *
60 */
61 public interface IWordsDataSource {
62 /***
63 * @param word The word to calculate the probability of
64 * @return The word probability if the word exists, null otherwise;
65 *
66 * @throws WordsDataSourceException If there is a fatal problem. For
67 * example, the database is unavailable
68 */
69 public WordProbability getWordProbability(String word) throws WordsDataSourceException;
70
71 /***
72 * Add a matching word to the data source
73 *
74 * @param word the word that matches
75 *
76 * @throws WordsDataSourceException If there is a fatal problem. For
77 * example, the database is unavailable
78 */
79 public void addMatch(String word) throws WordsDataSourceException;
80
81 /***
82 * Add a non-matching word to the data source
83 *
84 * @param word the word that does not match
85 *
86 * @throws WordsDataSourceException If there is a fatal problem. For
87 * example, the database is unavailable
88 */
89 public void addNonMatch(String word) throws WordsDataSourceException;
90 }