/* Richard A. DeVenezia
 * SUGI 29 - "Greetings from the Edge"
 * www.devenezia.com/papers
 */

import java.io.*;
import java.net.*;
import java.util.*;
import java.util.zip.*;
import javax.swing.JOptionPane;

public class ReadZippedFiles {

  ZipInputStream zis = null;
  Enumeration e = null;
  ZipEntry ze = null;

  boolean zeLoopStarted = false;
  boolean zerLoopStarted = false;
  boolean zerEndOfFile = false;

  BufferedReader zer;

  public String message;

  public ReadZippedFiles ( String aZipFile ) {
    URL url = null;
    InputStream is = null;

    try
    {
      url = new URL ( aZipFile );
      is = url.openStream();
    }
    catch (Exception e1)  {}

    if (url == null) {
      try {
        is = new FileInputStream ( aZipFile );
      }
      catch (IOException e2) {}
    }

    if (is == null) return;

    zis = new ZipInputStream ( is  );
  }

  public boolean getNextEntry () {
    if (zis != null)
    try
    {
      if (! zeLoopStarted) {
        ze = zis.getNextEntry();
        zeLoopStarted = true;
      }
      else
      if (ze != null) {
        ze = zis.getNextEntry();
      }

      if (ze == null) {
        zis.close();
      }
    }
    catch (java.io.IOException ioe)
    { ze = null; }

    zerLoopStarted = false;
    zerEndOfFile = false;

    return (ze != null);
  }

  public String getEntryName () {
    if (ze != null)
      return ze.getName() ;
    else
      return "";
  }

  public String readLine () {
    try
    {
      if (! zerLoopStarted) {
        zer = new BufferedReader ( new InputStreamReader ( zis ) ) ;
        zerLoopStarted = true;
      }
      String s = zer.readLine ();
      if (s == null) {
        zerEndOfFile = true;
        zis.closeEntry();
      }

      return s;
    }
    catch (java.io.IOException ioe)
    { return ""; }
  }

  public boolean endOfEntry () {
    return zerEndOfFile;
  }

  public static void main ( String[] arg ) {
    ReadZippedFiles rzf = new ReadZippedFiles ("D:\\Webs\\devenezia.com\\webapps\\ROOT\\papers\\sugi-29\\examples\\alarms-2000.zip");
//  ReadZippedFiles rzf = new ReadZippedFiles ("http://www.devenezia.com/papers/sugi-29/examples/alarms-2000.zip");

    while (rzf.getNextEntry()) {
      System.out.println (rzf.getEntryName());
      String s = rzf.readLine ();
      while (! rzf.endOfEntry()) {
        System.out.println (s);
        s = rzf.readLine ();
      }
    }

    System.out.println ("done.");
  }
}