// --- com/gerrans/util/EnumerationAdapterIterator.java: ---
/*                                                               Matt Gerrans
 *                                                                 10/02/2001
 *                                                                 
 * Copyright 2001, Matt Gerrans.
 */
package com.gerrans.util;
 
import java.util.Enumeration;
import java.util.Iterator;
import java.util.NoSuchElementException;
import java.lang.UnsupportedOperationException;
 
/**
 * A simple adapter to turn an Enumeration into an Iterator.
 */
public class EnumerationAdapterIterator implements Iterator
{
   Enumeration enumeration;
 
   public EnumerationAdapterIterator( Enumeration e )
   {
      enumeration = e;
   }
 
   public boolean hasNext()
   {
      return enumeration.hasMoreElements();
   }
 
   public Object next() throws NoSuchElementException
   {
      return enumeration.nextElement();
   }
 
   public void remove() throws UnsupportedOperationException
   {
      throw new UnsupportedOperationException();
   }
}
 
// --- SlinginHash.java: ---
import java.io.Reader;
import java.io.FileReader;
import java.io.IOException;
import java.io.FileNotFoundException;
 
import java.util.Set;
import java.util.HashSet;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.StringTokenizer;
 
import com.gerrans.util.EnumerationAdapterIterator;
 
public class SlinginHash
{
   private Set words;
 
   public SlinginHash( String filename ) throws FileNotFoundException, IOException
   {
      words = new HashSet();
      collectWords(filename);
   }
 
   public void collectWords( String filename ) throws FileNotFoundException, IOException
   {
      StringBuffer text = new StringBuffer();
      Reader reader = new FileReader( filename );
 
      int nextChar = reader.read();
 
      while( nextChar != -1 )
      {
         text.append( (char)nextChar );
         nextChar = reader.read();
      }
 
      String tokens = " \t\n!\"#$%&\'()*+,-./:;<=>?@[\\]^_`{|}~";
      Enumeration tokenizer = new StringTokenizer( text.toString(), tokens );
      EnumerationAdapterIterator data = new EnumerationAdapterIterator(tokenizer);
 
      while( data.hasNext() )
         words.add( data.next() );
   }
 
   public Set getWords()
   {
      return words;
   }
 
   public int getWordCount()
   {
      return words.size();
   }
 
   public static void main( String [] args )
   {      
      if( args.length == 1 )
      {
         String filename = args[0];
 
         try
         {
            SlinginHash sh = new SlinginHash( filename );
            if( sh.getWordCount() > 0 )
            {
               System.out.println( "There are " + sh.getWordCount() +
                                   " unique words in " + filename + " :" );
               
               Iterator word = sh.getWords().iterator();
               while( word.hasNext() )
                  System.out.println( (String)word.next() );
            }
         }
         catch( IOException ioe )
         {
            System.out.println( "Aaack!  --- " + ioe.getMessage() );
         }
      }
   }
}