Stanford CoreNLP Dependency parsing

depparsing.java

import java.io.File;
import java.io.IOException;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.Properties;

import org.apache.commons.io.FileUtils;

import edu.stanford.nlp.ling.CoreAnnotations.SentencesAnnotation;
import edu.stanford.nlp.pipeline.Annotation;
import edu.stanford.nlp.pipeline.StanfordCoreNLP;
import edu.stanford.nlp.semgraph.SemanticGraphCoreAnnotations.CollapsedCCProcessedDependenciesAnnotation;
import edu.stanford.nlp.trees.GrammaticalStructure;
import edu.stanford.nlp.trees.GrammaticalStructureFactory;
import edu.stanford.nlp.trees.PennTreebankLanguagePack;
import edu.stanford.nlp.trees.Tree;
import edu.stanford.nlp.trees.TreeCoreAnnotations.TreeAnnotation;
import edu.stanford.nlp.trees.TreebankLanguagePack;
import edu.stanford.nlp.trees.TypedDependency;
import edu.stanford.nlp.util.CoreMap;

//sg
public class DepParser {
	Properties prop;
	StanfordCoreNLP pipeline;

	DepParser() {
		prop = new Properties();
		prop.put("annotators", "tokenize, ssplit, pos, lemma , parse");
		pipeline = new StanfordCoreNLP(prop);
	}

	public static void main(String args[]) throws IOException {
		DepParser dprsr = new DepParser();
		String fileString = FileUtils.readFileToString(new File("sampleInput"));
		Annotation doc = new Annotation(fileString);
		dprsr.pipeline.annotate(doc);
		List<CoreMap> sentences = doc.get(SentencesAnnotation.class);
		for (CoreMap sentence : sentences) {
			Tree tree = sentence.get(TreeAnnotation.class);
			// Get dependency tree
			TreebankLanguagePack tlp = new PennTreebankLanguagePack();
			GrammaticalStructureFactory gsf = tlp.grammaticalStructureFactory();
			GrammaticalStructure gs = gsf.newGrammaticalStructure(tree);
			Collection<TypedDependency> td = gs.typedDependenciesCollapsed();
			Iterator<TypedDependency> tdi = td.iterator();
			while (tdi.hasNext()) {
				System.out.println(tdi.next());
			}
			System.out.println(sentence.get(CollapsedCCProcessedDependenciesAnnotation.class));
		}
	}

}