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http://issues.apache.org/bugzilla/show_bug.cgi?id=34882 ------- Additional Comments From [EMAIL PROTECTED] 2005-05-12 05:24 ------- Created an attachment (id=15002) --> (http://issues.apache.org/bugzilla/attachment.cgi?id=15002&action=view) SynonymMap.java /** * Loads the <a target="_blank" * href="http://www.cogsci.princeton.edu/~wn/";>WordNet </a> prolog file <a * href="http://www.cogsci.princeton.edu/2.0/WNprolog-2.0.tar.gz";>wn_s.pl </a> * into a thread-safe main-memory hash map that can be used for fast * high-frequncy lookups of synonyms for any given (lowercase) word string. * <p> * There holds: If B is a synonym for A (A -> B) then A is also a synonym for B (B -> A). * There does not necessary hold: A -> B, B -> C then A -> C. * <p> * Loading typically takes some 1.5 secs, so should be done only once per * (server) program execution, using a singleton pattern. Once loaded, a * synonym lookup via [EMAIL PROTECTED] #getSynonyms(String)}takes constant time O(1). * A loaded default synonym map consumes about 10 MB main memory. * An instance is immutable, hence thread-safe. * <p> * This implementation borrows some ideas from the * Lucene Syns2Index demo that Dave Spencer * dave@searchmorph.com originally contributed to Lucene. Dave's approach * involved a persistent Lucene index which is suitable for occasional * lookups or very large synonym tables, but considered unsuitable for * high-frequency lookups of medium size synonym tables. * <p> * Example Usage: * <pre> * String[] words = new String[] { "hard", "woods", "forest", "wolfish", "xxxx"}; * SynonymMap map = SynonymMap(new FileInputStream("samples/data/wn_s.pl")); * for (int i = 0; i < words.length; i++) { * String[] synonyms = map.getSynonyms(words[i]); * System.out.println(words[i] + ":" + java.util.Arrays.asList(synonyms).toString()); * } * * Example output: * hard:[arduous, backbreaking, difficult, fermented, firmly, grueling, gruelling, heavily, heavy, intemperately, knockout, laborious, punishing, severe, severely, strong, toilsome, tough] * woods:[forest, wood] * forest:[afforest, timber, timberland, wood, woodland, woods] * wolfish:[edacious, esurient, rapacious, ravening, ravenous, voracious, wolflike] * xxxx:[] * </pre> * * @author whoschek.AT.lbl.DOT.gov * @see <a target="_blank" * href="http://www.cogsci.princeton.edu/~wn/man/prologdb.5WN.html";>prologdb * man page </a> * @see <a target="_blank" href="http://www.hostmon.com/rfc/advanced.jsp";>Dave's synonym demo site</a> */ -- Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
