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Stanford Parser processes raw text in English, Chinese, German, Arabic, and French, and extracts constituency parse trees.

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package edu.stanford.nlp.sequences;

import edu.stanford.nlp.objectbank.IteratorFromReaderFactory;
import edu.stanford.nlp.util.CoreMap;

import java.util.List;
import java.io.PrintWriter;


/**
 * This interface is used for reading data and writing output into and out of sequence
 * classifiers. If you subclass this interface, all of the other mechanisms necessary
 * for getting your data into a sequence classifier will be taken care of for you.
 * Subclasses MUST have an empty constructor so they can be instantiated by
 * reflection, and there is a promise that the init method will be called
 * immediately after construction.
 *
 * @author Jenny Finkel
 */

public interface DocumentReaderAndWriter
        extends /* Serializable, */ IteratorFromReaderFactory> {

  /**
   * This will be called immediately after construction.  It's easier having
   * an init() method because DocumentReaderAndWriter objects are usually
   * created using reflection.
   *
   * @param flags Flags specifying behavior
   */
  void init(SeqClassifierFlags flags);

  /**
   * This method prints the output of the classifier to a
   * {@link PrintWriter}.
   *
   * @param doc The document which has answers (it has been classified)
   * @param out Where to send the output
   */
  void printAnswers(List doc, PrintWriter out);

}