TokenStreamPtr WhitespaceAnalyzer::reusableTokenStream(const String& fieldName, ReaderPtr reader)
{
TokenizerPtr tokenizer(boost::dynamic_pointer_cast<Tokenizer>(getPreviousTokenStream()));
if (!tokenizer)
{
tokenizer = newLucene<WhitespaceTokenizer>(reader);
setPreviousTokenStream(tokenizer);
}
else
tokenizer->reset(reader);
return tokenizer;
}
TokenStreamPtr ChineseAnalyzer::reusableTokenStream(const String& fieldName, ReaderPtr reader)
{
ChineseAnalyzerSavedStreamsPtr streams(boost::dynamic_pointer_cast<ChineseAnalyzerSavedStreams>(getPreviousTokenStream()));
if (!streams)
{
streams = newLucene<ChineseAnalyzerSavedStreams>();
streams->source = newLucene<ChineseTokenizer>(reader);
streams->result = newLucene<ChineseFilter>(streams->source);
setPreviousTokenStream(streams);
}
else
streams->source->reset(reader);
return streams->result;
}
TokenStreamPtr RussianAnalyzer::reusableTokenStream(const String& fieldName, const ReaderPtr& reader) {
RussianAnalyzerSavedStreamsPtr streams(boost::dynamic_pointer_cast<RussianAnalyzerSavedStreams>(getPreviousTokenStream()));
if (!streams) {
streams = newLucene<RussianAnalyzerSavedStreams>();
streams->source = newLucene<RussianLetterTokenizer>(reader);
streams->result = newLucene<LowerCaseFilter>(streams->source);
streams->result = newLucene<StopFilter>(StopFilter::getEnablePositionIncrementsVersionDefault(matchVersion), streams->result, stopSet);
streams->result = newLucene<RussianStemFilter>(streams->result);
setPreviousTokenStream(streams);
} else {
streams->source->reset(reader);
}
return streams->result;
}
TokenStreamPtr DutchAnalyzer::reusableTokenStream(const String& fieldName, ReaderPtr reader)
{
DutchAnalyzerSavedStreamsPtr streams(boost::dynamic_pointer_cast<DutchAnalyzerSavedStreams>(getPreviousTokenStream()));
if (!streams)
{
streams = newLucene<DutchAnalyzerSavedStreams>();
streams->source = newLucene<StandardTokenizer>(matchVersion, reader);
streams->result = newLucene<StandardFilter>(streams->source);
streams->result = newLucene<StopFilter>(StopFilter::getEnablePositionIncrementsVersionDefault(matchVersion), streams->result, stoptable);
streams->result = newLucene<DutchStemFilter>(streams->result, excltable);
setPreviousTokenStream(streams);
}
else
streams->source->reset(reader);
return streams->result;
}
TokenStreamPtr StandardAnalyzer::reusableTokenStream(const String& fieldName, ReaderPtr reader)
{
StandardAnalyzerSavedStreamsPtr streams = boost::dynamic_pointer_cast<StandardAnalyzerSavedStreams>(getPreviousTokenStream());
if (!streams)
{
streams = newLucene<StandardAnalyzerSavedStreams>();
setPreviousTokenStream(streams);
streams->tokenStream = newLucene<StandardTokenizer>(matchVersion, reader);
streams->filteredTokenStream = newLucene<StandardFilter>(streams->tokenStream);
streams->filteredTokenStream = newLucene<LowerCaseFilter>(streams->filteredTokenStream);
streams->filteredTokenStream = newLucene<StopFilter>(enableStopPositionIncrements, streams->filteredTokenStream, stopSet);
}
else
streams->tokenStream->reset(reader);
streams->tokenStream->setMaxTokenLength(maxTokenLength);
streams->tokenStream->setReplaceInvalidAcronym(replaceInvalidAcronym);
return streams->filteredTokenStream;
}
void DutchAnalyzer::setStemExclusionTable(HashSet<String> exclusions)
{
excltable = exclusions;
setPreviousTokenStream(LuceneObjectPtr()); // force a new stemmer to be created
}
