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Stanford CoreNLP provides a set of natural language analysis tools which can take raw English language text input and give the base forms of words, their parts of speech, whether they are names of companies, people, etc., normalize dates, times, and numeric quantities, mark up the structure of sentences in terms of phrases and word dependencies, and indicate which noun phrases refer to the same entities. It provides the foundational building blocks for higher level text understanding applications.

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package edu.stanford.nlp.io; 
import edu.stanford.nlp.util.logging.Redwood;

import edu.stanford.nlp.util.ByteStreamGobbler;
import edu.stanford.nlp.util.RuntimeInterruptedException;
import edu.stanford.nlp.util.StreamGobbler;

import java.io.*;

/**
* Opens a outputstream for writing into a bzip2 file by piping into the bzip2 command.
* Output from bzip2 command is written into the specified file.
* 
* @author Angel Chang
*/
public class BZip2PipedOutputStream extends OutputStream
{
  private String filename;
  private Process process;
  private ByteStreamGobbler outGobbler;
  private StreamGobbler errGobbler;
  private PrintWriter errWriter;

  public BZip2PipedOutputStream(String filename) throws IOException {
    this(filename, System.err);
  }

  public BZip2PipedOutputStream(String filename, OutputStream err) throws IOException {
    String bzip2 = System.getProperty("bzip2", "bzip2");
    String cmd = bzip2; // + " > " + filename;
    //log.info("getBZip2PipedOutputStream: Running command: "+cmd);
    ProcessBuilder pb = new ProcessBuilder();
    pb.command(cmd);
    this.process = pb.start();
    this.filename = filename;
    OutputStream outStream = new FileOutputStream(filename);
    errWriter = new PrintWriter(new BufferedWriter(new OutputStreamWriter(err)));
    outGobbler = new ByteStreamGobbler("Output stream gobbler: " + cmd + " " + filename,
            process.getInputStream(), outStream);
    errGobbler = new StreamGobbler(process.getErrorStream(), errWriter);
    outGobbler.start();
    errGobbler.start();
  }

  public void flush() throws IOException
  {
    process.getOutputStream().flush();
  }

  public void write(int b) throws IOException
  {
    process.getOutputStream().write(b);
  }

  public void close() throws IOException
  {
    process.getOutputStream().close();
    try {
      outGobbler.join();
      errGobbler.join();
      outGobbler.getOutputStream().close();
      process.waitFor();
    } catch (InterruptedException ex) {
      throw new RuntimeInterruptedException(ex);
    }
    //log.info("getBZip2PipedOutputStream: Closed. ");
  }
}