@Override
public TokenStream reusableTokenStream(String fieldName, Reader reader) throws IOException {
class SavedStreams {
StandardTokenizer tokenStream;
TokenStream filteredTokenStream;
}
SavedStreams streams = (SavedStreams) getPreviousTokenStream();
if (streams == null) {
streams = new SavedStreams();
setPreviousTokenStream(streams);
streams.tokenStream = new StandardTokenizer(LUCENE_VERSION, reader);
streams.filteredTokenStream = new StandardFilter(streams.tokenStream);
streams.filteredTokenStream = new LowerCaseFilter(streams.filteredTokenStream);
streams.filteredTokenStream =
new StopFilter(true, streams.filteredTokenStream, STOP_WORDS_SET);
streams.filteredTokenStream = new ASCIIFoldingFilter(streams.filteredTokenStream);
} else {
streams.tokenStream.reset(reader);
}
streams.tokenStream.setMaxTokenLength(DEFAULT_MAX_TOKEN_LENGTH);
return streams.filteredTokenStream;
}
