import java.util.Properties;


import edu.stanford.nlp.ling.CoreAnnotations;
import edu.stanford.nlp.neural.rnn.RNNCoreAnnotations;
import edu.stanford.nlp.pipeline.Annotation;
import edu.stanford.nlp.pipeline.StanfordCoreNLP;
import edu.stanford.nlp.sentiment.SentimentCoreAnnotations;
import edu.stanford.nlp.trees.Tree;
import edu.stanford.nlp.util.CoreMap;

public class StanfordSentiment {


StanfordCoreNLP pipeline;



public StanfordSentiment(){
    Properties props = new Properties();
    props.setProperty("annotators", "tokenize, ssplit, parse, sentiment");

    pipeline = new StanfordCoreNLP(props);


}

public float calculateSentiment (String text) {


        float mainSentiment = 0;

        int longest = 0;
        Annotation annotation = pipeline.process(text);
        for (CoreMap sentence : annotation.get(CoreAnnotations.SentencesAnnotation.class)) {
            Tree tree = sentence.get(SentimentCoreAnnotations.AnnotatedTree.class);
            int sentiment = RNNCoreAnnotations.getPredictedClass(tree) - 2;
            String partText = sentence.toString();
            if (partText.length() > longest) {
                mainSentiment = sentiment;
                longest = partText.length();
            }

        }

       return mainSentiment;



}
}