public double calculateSentiment(String tweet) {
if (filters != null) {
tweet = filters.apply(tweet);
}
List<LexicalToken> lexicalTokens = LexicalParser.lexicallyParseTweet(tweet, phraseTree);
for (int i = 0; i < lexicalTokens.size(); i++) {
LexicalToken token = lexicalTokens.get(i);
String phrase = token.getPhrase();
if (lexicon.hasToken(phrase)) {
token.setLexicalValue(lexicon.getTokenPolarity(phrase));
} else if (ClassifierOptions.isNegation(phrase)) {
propagateNegation(lexicalTokens, i);
} else if (ClassifierOptions.isIntensifier(phrase)) {
intensifyNext(lexicalTokens, i, ClassifierOptions.getIntensifierValue(phrase));
}
}
return lexicalTokens.stream().mapToDouble(LexicalToken::getSentimentValue).sum();
}
public Classifier(PriorPolarityLexicon lexicon, Filters filters) {
this.lexicon = lexicon;
this.filters = filters;
this.phraseTree = new TokenTrie(lexicon.getSubjectiveWords());
}