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net.sf.classifier4J.demo.Analyser	0%	0%

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		package net.sf.classifier4J.demo;
52
53		import java.io.FileInputStream;
54		import java.io.IOException;
55		import java.io.InputStream;
56		import java.sql.SQLException;
57
58		import net.sf.classifier4J.ClassifierException;
59		import net.sf.classifier4J.DefaultTokenizer;
60		import net.sf.classifier4J.IClassifier;
61		import net.sf.classifier4J.ITokenizer;
62		import net.sf.classifier4J.Utilities;
63		import net.sf.classifier4J.bayesian.BayesianClassifier;
64		import net.sf.classifier4J.bayesian.JDBMWordsDataSource;
65
66		/**
67		* @author Nick Lothian
68		* @author Peter Leschev
69		*/
70	0	public class Analyser {
71
72	0	public static String connectionString = Trainer.connectionString;
73	0	public static String username = Trainer.username;
74	0	public static String password = Trainer.password;
75
76		static JDBMWordsDataSource wds;
77
78		private static IClassifier setupClassifier(ITokenizer tokenizer, String connString, String user, String pw) throws SQLException, IOException {
79		/*
80		DriverMangerJDBCConnectionManager cm = new DriverMangerJDBCConnectionManager(connString, user, pw);
81		JDBCWordsDataSource wds = new JDBCWordsDataSource(cm);
82		wds.createTable();
83		*/
84	0	wds = new JDBMWordsDataSource("./database/");
85	0	wds.open();
86	0	return new BayesianClassifier(wds, tokenizer);
87		}
88
89		/**
90		* @returns Words Per Second
91		*/
92		public static double useClassifier(ITokenizer tokenizer,
93		IClassifier classifier,
94		InputStream inputStream) throws IOException, ClassifierException {
95
96		// System.out.println("Using Classifier4J with " + classifier + " and " +
97		// tokenizer);
98
99	0	String contents = Utilities.getString(inputStream);
100	0	int length = tokenizer.tokenize(contents).length;
101
102		// System.out.println("Analysing " + length + " words. This may take a while.");
103
104	0	long startTime = System.currentTimeMillis();
105
106	0	double matchProb = classifier.classify(contents);
107
108	0	long endTime = System.currentTimeMillis();
109
110	0	double time = (class="keyword">double)(endTime - startTime) / (class="keyword">double)1000;
111
112	0	if (Double.compare(time, 0) == 0) {
113	0	time = 1;
114		}
115
116	0	double wordsPerSecond = length / time;
117
118		// System.out.println("Done. Took " + time + " seconds, which is " +
119		// wordsPerSecond + " words per second.");
120
121		// System.out.println("Match Probability = " + matchProb);
122		// System.out.println("Is considered a match: " + classifier.isMatch(matchProb));
123
124	0	return wordsPerSecond;
125		}
126
127		public static void main(String[] args) throws Exception {
128	0	System.out.println("This program reads in a single file and classifies it as a match or not.");
129	0	System.out.println("It should be run after the Trainer program.");
130
131
132	0	String filename = "./demodata/toanalyse.txt";
133
134
135	0	InputStream input = new FileInputStream(filename);
136	0	ITokenizer tokenizer = new DefaultTokenizer();
137	0	IClassifier classifier = setupClassifier(tokenizer, connectionString, username, password);
138
139	0	useClassifier(tokenizer, classifier, input);
140
141	0	wds.close();
142	0	}
143		/*
144		static {
145		try {
146		Class.forName("org.hsqldb.jdbcDriver");
147		//Class.forName("org.gjt.mm.mysql.Driver");
148		} catch (ClassNotFoundException e) {
149		e.printStackTrace();
150		}
151		}
152		*/
153		}

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