text: public void inform(ResourceLoader loader) throws IOException {if (stopWordFiles != null) {if (FORMAT_WORDSET.equalsIgnoreCase(format)) {stopWords = getWordSet(loader, stopWordFiles, ignoreCase);} else if (FORMAT_SNOWBALL.equalsIgnoreCase(format)) {stopWords = getSnowballWordSet(loader, stopWordFiles, ignoreCase);} else {throw new IllegalArgumentException("Unknown 'format' specified for 'words' file: " + format);}} else {if (null != format) {throw new IllegalArgumentException("'format' can not be specified w/o an explicit 'words' file: " + format);}stopWords = new CharArraySet(EnglishAnalyzer.ENGLISH_STOP_WORDS_SET, ignoreCase);}}