001    /**
002     * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.kernel.search.analysis;
016    
017    import com.liferay.portal.kernel.search.SearchException;
018    import com.liferay.registry.Registry;
019    import com.liferay.registry.RegistryUtil;
020    import com.liferay.registry.ServiceTracker;
021    
022    import java.util.List;
023    
024    /**
025     * @author David Mendez Gonzalez
026     */
027    public class TokenizerUtil {
028    
029            public static Tokenizer getTokenizer() {
030                    Tokenizer tokenizer = _instance._serviceTracker.getService();
031    
032                    if (tokenizer == null) {
033                            tokenizer = _defaultTokenizer;
034                    }
035    
036                    return tokenizer;
037            }
038    
039            public static List<String> tokenize(
040                            String fieldName, String input, String languageId)
041                    throws SearchException {
042    
043                    return getTokenizer().tokenize(fieldName, input, languageId);
044            }
045    
046            private TokenizerUtil() {
047                    Registry registry = RegistryUtil.getRegistry();
048    
049                    _serviceTracker = registry.trackServices(Tokenizer.class);
050            }
051    
052            private static final TokenizerUtil _instance = new TokenizerUtil();
053    
054            private static final Tokenizer _defaultTokenizer = new SimpleTokenizer();
055    
056            private final ServiceTracker<Tokenizer, Tokenizer> _serviceTracker;
057    
058    }