/* ****  StopList.java  ***********************************************
                       Implement stoplist as HashTable 
**********************************************************************/

package drsystem;

import java.util.*;
import java.io.*;

class StopList extends Hashtable<String,String>
{
 public StopList(String file) throws IOException
 {
  super();         //call to parent class constructor
  try
  {
   BufferedReader Istream=new BufferedReader(new FileReader(file)); //create input stream
   String word;

   while((word=Istream.readLine())!=null)    //read stopword in each line
   put(word,word);                      // and put in into HashTable

   Istream.close();                          //close stream
  } //end of try block

  catch(NullPointerException  e)
  {
   System.out.println("StopList.java:  " + e.getMessage());
  }
  catch(FileNotFoundException  e)
  {
   System.out.println("StopList.java:  " + e.getMessage());
  }

 }
}