com.stimulus.archiva.language.AnalyzerFactory.java Source code

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Here is the source code for com.stimulus.archiva.language.AnalyzerFactory.java

Source

/* Copyright (C) 2005-2007 Jamie Angus Band 
 * MailArchiva Open Source Edition Copyright (c) 2005-2007 Jamie Angus Band
 * This program is free software; you can redistribute it and/or modify it under the terms of
 * the GNU General Public License as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along with this program;
 * if not, see http://www.gnu.org/licenses or write to the Free Software Foundation,Inc., 51
 * Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
 */

package com.stimulus.archiva.language;

import org.apache.commons.logging.*;
import org.apache.lucene.analysis.*;
import com.stimulus.archiva.domain.*;
import com.stimulus.archiva.search.*;

import java.io.Serializable;
import java.util.*;

public class AnalyzerFactory implements Serializable {

    /**
     * 
     */
    private static final long serialVersionUID = 1078168764623051823L;

    public enum Operation {
        INDEX, SEARCH
    };

    protected static final Log logger = LogFactory.getLog(AnalyzerFactory.class.getName());

    public static Analyzer getAnalyzer(String language, Operation operation) {

        if (language == null) {
            language = "en";
        }
        Analyzer analyzer = null;
        logger.debug("getAnalyzer() {language='" + language + "'}");
        String className = null;

        try {
            Map analyzers = Config.getConfig().getSearch().getSearchAnalyzers();
            if (analyzers.containsKey(language)) {
                className = (String) analyzers.get(language);
                logger.debug("successfully obtained class name for search analyzer {language='" + language
                        + "', class='" + className + "'}");
            } else {
                className = (String) analyzers.get(Config.getConfig().getIndex().getIndexLanguage());
                logger.debug("email language is unsupported. using default language.  {language='" + language
                        + "', class='" + className + "'}");
            }
            Class analyzerClass = Class.forName(className);
            if (analyzerClass == null) {
                logger.error(
                        "failed to return search analyzer. are the analyzers specified correctly in server.conf? {language='"
                                + language + "', class='" + className + "'}");
                logger.error(
                        "recovering by returning default archiver analyzer. indexing and search may be impaired. urgent fix required.");
                analyzer = new ArchivaAnalyzer();
            } else {
                logger.debug("retrieved analyzer class {language='" + language + "', class='" + className + "'}");
                analyzer = (Analyzer) analyzerClass.newInstance();
                logger.debug(
                        "analyzer class instance created {language='" + language + "', class='" + className + "'}");
            }
            logger.debug("successfully returned search analyzer {language='" + language + "', class='" + className
                    + "'}");
        } catch (Exception e) {
            logger.error(
                    "failed to return search analyzer. are the analyzers specified correctly in server.conf? {language='"
                            + language + "', class='" + className + "'}",
                    e);
            logger.error(
                    "recovering by returning default archiver analyzer. indexing and search may be impaired. urgent fix required.");
            analyzer = new ArchivaAnalyzer();
        }
        PerFieldAnalyzerWrapper wrapper = new PerFieldAnalyzerWrapper(analyzer);

        if (operation == Operation.INDEX) {
            wrapper.addAnalyzer("to", new EmailAnalyzer());
            wrapper.addAnalyzer("from", new EmailAnalyzer());
            wrapper.addAnalyzer("cc", new EmailAnalyzer());
            wrapper.addAnalyzer("bcc", new EmailAnalyzer());
            wrapper.addAnalyzer("deliveredto", new EmailAnalyzer());
            wrapper.addAnalyzer("attachname", new FileNameAnalyzer());
        } else {
            wrapper.addAnalyzer("to", new WhitespaceAnalyzer());
            wrapper.addAnalyzer("from", new WhitespaceAnalyzer());
            wrapper.addAnalyzer("cc", new WhitespaceAnalyzer());
            wrapper.addAnalyzer("bcc", new WhitespaceAnalyzer());
            wrapper.addAnalyzer("deliveredto", new WhitespaceAnalyzer());
            wrapper.addAnalyzer("attachname", new FileNameAnalyzer());
        }
        return wrapper;
    }
}