indexReader = IndexReader.open(indexDir);
// 1. Create content spellIndex
File spellDictionaryFile = new File(spellDictionaryPath);
Directory contentSpellIndexDirectory = FSDirectory.open(new File(spellDictionaryPath + CONTENT_PATH));//true
SpellChecker contentSpellChecker = new SpellChecker(contentSpellIndexDirectory);
Dictionary contentDictionary = new LuceneDictionary(indexReader, OlatDocument.CONTENT_FIELD_NAME);
contentSpellChecker.indexDictionary(contentDictionary);
// 2. Create title spellIndex
Directory titleSpellIndexDirectory = FSDirectory.open(new File(spellDictionaryPath + TITLE_PATH));//true
SpellChecker titleSpellChecker = new SpellChecker(titleSpellIndexDirectory);
Dictionary titleDictionary = new LuceneDictionary(indexReader, OlatDocument.TITLE_FIELD_NAME);
titleSpellChecker.indexDictionary(titleDictionary);
// 3. Create description spellIndex
Directory descriptionSpellIndexDirectory = FSDirectory.open(new File(spellDictionaryPath + DESCRIPTION_PATH));//true
SpellChecker descriptionSpellChecker = new SpellChecker(descriptionSpellIndexDirectory);
Dictionary descriptionDictionary = new LuceneDictionary(indexReader, OlatDocument.DESCRIPTION_FIELD_NAME);
descriptionSpellChecker.indexDictionary(descriptionDictionary);
// 4. Create author spellIndex
Directory authorSpellIndexDirectory = FSDirectory.open(new File(spellDictionaryPath + AUTHOR_PATH));//true
SpellChecker authorSpellChecker = new SpellChecker(authorSpellIndexDirectory);
Dictionary authorDictionary = new LuceneDictionary(indexReader, OlatDocument.AUTHOR_FIELD_NAME);
authorSpellChecker.indexDictionary(authorDictionary);
// Merge all part spell indexes (content,title etc.) to one common spell index
Directory spellIndexDirectory = FSDirectory.open(spellDictionaryFile);//true
IndexWriter merger = new IndexWriter(spellIndexDirectory, new StandardAnalyzer(Version.LUCENE_CURRENT), true, IndexWriter.MaxFieldLength.UNLIMITED);