/**
* Scores a tagging for a sentence. Note that a tag sequence not accepted by the markov process
* should receive a log score of Double.NEGATIVE_INFINITY.
*/
public double scoreTagging(TaggedSentence taggedSentence) {
double logScore = 0.0;
List<LabeledLocalTrigramContext> labeledLocalTrigramContexts =
extractLabeledLocalTrigramContexts(taggedSentence);
for (LabeledLocalTrigramContext labeledLocalTrigramContext : labeledLocalTrigramContexts) {
Counter<String> logScoreCounter =
localTrigramScorer.getLogScoreCounter(labeledLocalTrigramContext);
String currentTag = labeledLocalTrigramContext.getCurrentTag();
if (logScoreCounter.containsKey(currentTag)) {
logScore += logScoreCounter.getCount(currentTag);
} else {
logScore += Double.NEGATIVE_INFINITY;
}
}
return logScore;
}
public boolean contains(K token) {
return lm.containsKey(token);
}
public double getProb(K token) {
if (unkTokens.contains(token) || !lm.containsKey(token)) return UNK_PROB;
return lm.getCount(token);
}