/**

  * Distribution License:

  * JSword is free software; you can redistribute it and/or modify it under

  * the terms of the GNU Lesser General Public License, version 2.1 or later

  * as published by the Free Software Foundation. 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 Lesser General Public License for more details.

  *

  * The License is available on the internet at:

  *      http://www.gnu.org/copyleft/lgpl.html

  * or by writing to:

  *      Free Software Foundation, Inc.

  *      59 Temple Place - Suite 330

  *      Boston, MA 02111-1307, USA

  *

  * © CrossWire Bible Society, 2005 - 2016

  *

  */

 package org.crosswire.jsword.index.lucene.analysis;

 import java.io.Reader;

 import org.apache.lucene.analysis.Analyzer;

 import org.apache.lucene.analysis.PerFieldAnalyzerWrapper;

 import org.apache.lucene.analysis.SimpleAnalyzer;

 import org.apache.lucene.analysis.TokenStream;

 import org.crosswire.jsword.book.Book;

 import org.crosswire.jsword.index.lucene.IndexMetadata;

 import org.crosswire.jsword.index.lucene.InstalledIndex;

 import org.crosswire.jsword.index.lucene.LuceneIndex;

 import org.slf4j.Logger;

 import org.slf4j.LoggerFactory;

 /**

  * A specialized analyzer for Books that analyzes different fields differently.

  * This is book specific since it is possible that each book has specialized

  * search requirements.

  * 

  * Uses AnalyzerFactory for InstalledIndexVersion > 1.1

  * 

  * @see gnu.lgpl.License The GNU Lesser General Public License for details.

  * @author DM Smith

  */

 public class LuceneAnalyzer extends Analyzer {

     public LuceneAnalyzer(Book book) {

         // The default analysis

         analyzer = new PerFieldAnalyzerWrapper(new SimpleAnalyzer());

         if (InstalledIndex.instance().getInstalledIndexDefaultVersion() > IndexMetadata.INDEX_VERSION_1_1) {

             // Content is analyzed using natural language analyzer

             // (stemming, stopword etc)

             Analyzer myNaturalLanguageAnalyzer = AnalyzerFactory.getInstance().createAnalyzer(book);

             analyzer.addAnalyzer(LuceneIndex.FIELD_BODY, myNaturalLanguageAnalyzer);

             //analyzer.addAnalyzer(LuceneIndex.FIELD_HEADING, myNaturalLanguageAnalyzer);  //heading to use same analyzer as BODY

             //analyzer.addAnalyzer(LuceneIndex.FIELD_INTRO, myNaturalLanguageAnalyzer);

             log.debug("{}: Using languageAnalyzer: {}", book.getBookMetaData().getInitials(), myNaturalLanguageAnalyzer.getClass().getName());

         }

         // Keywords are normalized to osisIDs

         analyzer.addAnalyzer(LuceneIndex.FIELD_KEY, new KeyAnalyzer());

         // Strong's Numbers are normalized to a consistent representation

         analyzer.addAnalyzer(LuceneIndex.FIELD_STRONG, new StrongsNumberAnalyzer());

         // Strong's Numbers and Robinson's morphological codes are normalized to a consistent representation

         analyzer.addAnalyzer(LuceneIndex.FIELD_MORPHOLOGY, new MorphologyAnalyzer());

         // XRefs are normalized from ranges into a list of osisIDs

         analyzer.addAnalyzer(LuceneIndex.FIELD_XREF, new XRefAnalyzer());

     }

     @Override

     public TokenStream tokenStream(String fieldName, Reader reader) {

         return analyzer.tokenStream(fieldName, reader);

     }

     private PerFieldAnalyzerWrapper analyzer;

     private static final Logger log = LoggerFactory.getLogger(LuceneAnalyzer.class);

 }