private void initializeFeatsComputers() {
featuresComputers = new HashMap<SupportedFeature, FeatureValueComputer>();
featuresComputers.put(SupportedFeature.UniGrams, new DeltaTFIDFComputerUni());
featuresComputers.put(SupportedFeature.BiGrams, new DeltaTFIDFComputerBi());
featuresComputers.put(SupportedFeature.SentimentFeats, new SentimentValueComputer());
featuresComputers.put(SupportedFeature.TaggedStems, new BinaryComputerTaggedStem());
}