stopwords.java

一个数据挖掘软件ALPHAMINERR的整个过程的JAVA版源代码

/*
 *    This program is free software; you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation; either version 2 of the License, or
 *    (at your option) any later version.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program; if not, write to the Free Software
 *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */



/*
 *    Stopwords.java
 *    Copyright (C) 2001 Eibe Frank
 */

package weka.core;

import java.util.Hashtable;

/**
 * Class that can test whether a given string is a stop word.
 * Lowercases all words before the test.
 *
 * @author Eibe Frank ([e-mail])
 * @author Ashraf M. Kibriya ([e-mail])
 * @version 1.0
 */
public class Stopwords {
  
  /** The hashtable containing the list of stopwords */
  private static Hashtable m_Stopwords = null;

  static {
   
    if (m_Stopwords == null) {
      m_Stopwords = new Hashtable();
      Double dummy = new Double(0);

      
      //Stopwords list from Rainbow
      m_Stopwords.put("a", dummy);
      m_Stopwords.put("able", dummy);
      m_Stopwords.put("about", dummy);
      m_Stopwords.put("above", dummy);
      m_Stopwords.put("according", dummy);
      m_Stopwords.put("accordingly", dummy);
      m_Stopwords.put("across", dummy);
      m_Stopwords.put("actually", dummy);
      m_Stopwords.put("after", dummy);
      m_Stopwords.put("afterwards", dummy);
      m_Stopwords.put("again", dummy);
      m_Stopwords.put("against", dummy);
      m_Stopwords.put("all", dummy);
      m_Stopwords.put("allow", dummy);
      m_Stopwords.put("allows", dummy);
      m_Stopwords.put("almost", dummy);
      m_Stopwords.put("alone", dummy);
      m_Stopwords.put("along", dummy);
      m_Stopwords.put("already", dummy);
      m_Stopwords.put("also", dummy);
      m_Stopwords.put("although", dummy);
      m_Stopwords.put("always", dummy);
      m_Stopwords.put("am", dummy);
      m_Stopwords.put("among", dummy);
      m_Stopwords.put("amongst", dummy);
      m_Stopwords.put("an", dummy);
      m_Stopwords.put("and", dummy);
      m_Stopwords.put("another", dummy);
      m_Stopwords.put("any", dummy);
      m_Stopwords.put("anybody", dummy);
      m_Stopwords.put("anyhow", dummy);
      m_Stopwords.put("anyone", dummy);
      m_Stopwords.put("anything", dummy);
      m_Stopwords.put("anyway", dummy);
      m_Stopwords.put("anyways", dummy);
      m_Stopwords.put("anywhere", dummy);
      m_Stopwords.put("apart", dummy);
      m_Stopwords.put("appear", dummy);
      m_Stopwords.put("appreciate", dummy);
      m_Stopwords.put("appropriate", dummy);
      m_Stopwords.put("are", dummy);
      m_Stopwords.put("around", dummy);
      m_Stopwords.put("as", dummy);
      m_Stopwords.put("aside", dummy);
      m_Stopwords.put("ask", dummy);
      m_Stopwords.put("asking", dummy);
      m_Stopwords.put("associated", dummy);
      m_Stopwords.put("at", dummy);
      m_Stopwords.put("available", dummy);
      m_Stopwords.put("away", dummy);
      m_Stopwords.put("awfully", dummy);
      m_Stopwords.put("b", dummy);
      m_Stopwords.put("be", dummy);
      m_Stopwords.put("became", dummy);
      m_Stopwords.put("because", dummy);
      m_Stopwords.put("become", dummy);
      m_Stopwords.put("becomes", dummy);
      m_Stopwords.put("becoming", dummy);
      m_Stopwords.put("been", dummy);
      m_Stopwords.put("before", dummy);
      m_Stopwords.put("beforehand", dummy);
      m_Stopwords.put("behind", dummy);
      m_Stopwords.put("being", dummy);
      m_Stopwords.put("believe", dummy);
      m_Stopwords.put("below", dummy);
      m_Stopwords.put("beside", dummy);
      m_Stopwords.put("besides", dummy);
      m_Stopwords.put("best", dummy);
      m_Stopwords.put("better", dummy);
      m_Stopwords.put("between", dummy);
      m_Stopwords.put("beyond", dummy);
      m_Stopwords.put("both", dummy);
      m_Stopwords.put("brief", dummy);
      m_Stopwords.put("but", dummy);
      m_Stopwords.put("by", dummy);
      m_Stopwords.put("c", dummy);
      m_Stopwords.put("came", dummy);
      m_Stopwords.put("can", dummy);
      m_Stopwords.put("cannot", dummy);
      m_Stopwords.put("cant", dummy);
      m_Stopwords.put("cause", dummy);
      m_Stopwords.put("causes", dummy);
      m_Stopwords.put("certain", dummy);
      m_Stopwords.put("certainly", dummy);
      m_Stopwords.put("changes", dummy);
      m_Stopwords.put("clearly", dummy);
      m_Stopwords.put("co", dummy);
      m_Stopwords.put("com", dummy);
      m_Stopwords.put("come", dummy);
      m_Stopwords.put("comes", dummy);
      m_Stopwords.put("concerning", dummy);
      m_Stopwords.put("consequently", dummy);
      m_Stopwords.put("consider", dummy);
      m_Stopwords.put("considering", dummy);
      m_Stopwords.put("contain", dummy);
      m_Stopwords.put("containing", dummy);
      m_Stopwords.put("contains", dummy);
      m_Stopwords.put("corresponding", dummy);
      m_Stopwords.put("could", dummy);
      m_Stopwords.put("course", dummy);
      m_Stopwords.put("currently", dummy);
      m_Stopwords.put("d", dummy);
      m_Stopwords.put("definitely", dummy);
      m_Stopwords.put("described", dummy);
      m_Stopwords.put("despite", dummy);
      m_Stopwords.put("did", dummy);
      m_Stopwords.put("different", dummy);
      m_Stopwords.put("do", dummy);
      m_Stopwords.put("does", dummy);
      m_Stopwords.put("doing", dummy);
      m_Stopwords.put("done", dummy);
      m_Stopwords.put("down", dummy);
      m_Stopwords.put("downwards", dummy);
      m_Stopwords.put("during", dummy);
      m_Stopwords.put("e", dummy);
      m_Stopwords.put("each", dummy);
      m_Stopwords.put("edu", dummy);
      m_Stopwords.put("eg", dummy);
      m_Stopwords.put("eight", dummy);
      m_Stopwords.put("either", dummy);
      m_Stopwords.put("else", dummy);
      m_Stopwords.put("elsewhere", dummy);
      m_Stopwords.put("enough", dummy);
      m_Stopwords.put("entirely", dummy);
      m_Stopwords.put("especially", dummy);
      m_Stopwords.put("et", dummy);
      m_Stopwords.put("etc", dummy);
      m_Stopwords.put("even", dummy);
      m_Stopwords.put("ever", dummy);
      m_Stopwords.put("every", dummy);
      m_Stopwords.put("everybody", dummy);
      m_Stopwords.put("everyone", dummy);
      m_Stopwords.put("everything", dummy);
      m_Stopwords.put("everywhere", dummy);
      m_Stopwords.put("ex", dummy);
      m_Stopwords.put("exactly", dummy);
      m_Stopwords.put("example", dummy);
      m_Stopwords.put("except", dummy);
      m_Stopwords.put("f", dummy);
      m_Stopwords.put("far", dummy);
      m_Stopwords.put("few", dummy);
      m_Stopwords.put("fifth", dummy);
      m_Stopwords.put("first", dummy);
      m_Stopwords.put("five", dummy);
      m_Stopwords.put("followed", dummy);
      m_Stopwords.put("following", dummy);
      m_Stopwords.put("follows", dummy);
      m_Stopwords.put("for", dummy);
      m_Stopwords.put("former", dummy);
      m_Stopwords.put("formerly", dummy);
      m_Stopwords.put("forth", dummy);
      m_Stopwords.put("four", dummy);
      m_Stopwords.put("from", dummy);
      m_Stopwords.put("further", dummy);
      m_Stopwords.put("furthermore", dummy);
      m_Stopwords.put("g", dummy);
      m_Stopwords.put("get", dummy);
      m_Stopwords.put("gets", dummy);
      m_Stopwords.put("getting", dummy);
      m_Stopwords.put("given", dummy);
      m_Stopwords.put("gives", dummy);
      m_Stopwords.put("go", dummy);
      m_Stopwords.put("goes", dummy);
      m_Stopwords.put("going", dummy);
      m_Stopwords.put("gone", dummy);
      m_Stopwords.put("got", dummy);
      m_Stopwords.put("gotten", dummy);
      m_Stopwords.put("greetings", dummy);
      m_Stopwords.put("h", dummy);
      m_Stopwords.put("had", dummy);
      m_Stopwords.put("happens", dummy);
      m_Stopwords.put("hardly", dummy);
      m_Stopwords.put("has", dummy);
      m_Stopwords.put("have", dummy);
      m_Stopwords.put("having", dummy);
      m_Stopwords.put("he", dummy);
      m_Stopwords.put("hello", dummy);
      m_Stopwords.put("help", dummy);
      m_Stopwords.put("hence", dummy);
      m_Stopwords.put("her", dummy);
      m_Stopwords.put("here", dummy);
      m_Stopwords.put("hereafter", dummy);
      m_Stopwords.put("hereby", dummy);
      m_Stopwords.put("herein", dummy);
      m_Stopwords.put("hereupon", dummy);
      m_Stopwords.put("hers", dummy);
      m_Stopwords.put("herself", dummy);
      m_Stopwords.put("hi", dummy);
      m_Stopwords.put("him", dummy);
      m_Stopwords.put("himself", dummy);
      m_Stopwords.put("his", dummy);
      m_Stopwords.put("hither", dummy);
      m_Stopwords.put("hopefully", dummy);
      m_Stopwords.put("how", dummy);
      m_Stopwords.put("howbeit", dummy);
      m_Stopwords.put("however", dummy);
      m_Stopwords.put("i", dummy);
      m_Stopwords.put("ie", dummy);
      m_Stopwords.put("if", dummy);
      m_Stopwords.put("ignored", dummy);
      m_Stopwords.put("immediate", dummy);
      m_Stopwords.put("in", dummy);
      m_Stopwords.put("inasmuch", dummy);
      m_Stopwords.put("inc", dummy);
      m_Stopwords.put("indeed", dummy);
      m_Stopwords.put("indicate", dummy);
      m_Stopwords.put("indicated", dummy);
      m_Stopwords.put("indicates", dummy);
      m_Stopwords.put("inner", dummy);
      m_Stopwords.put("insofar", dummy);
      m_Stopwords.put("instead", dummy);
      m_Stopwords.put("into", dummy);
      m_Stopwords.put("inward", dummy);
      m_Stopwords.put("is", dummy);
      m_Stopwords.put("it", dummy);
      m_Stopwords.put("its", dummy);
      m_Stopwords.put("itself", dummy);
      m_Stopwords.put("j", dummy);
      m_Stopwords.put("just", dummy);
      m_Stopwords.put("k", dummy);
      m_Stopwords.put("keep", dummy);
      m_Stopwords.put("keeps", dummy);
      m_Stopwords.put("kept", dummy);
      m_Stopwords.put("know", dummy);
      m_Stopwords.put("knows", dummy);
      m_Stopwords.put("known", dummy);
      m_Stopwords.put("l", dummy);
      m_Stopwords.put("last", dummy);
      m_Stopwords.put("lately", dummy);
      m_Stopwords.put("later", dummy);
      m_Stopwords.put("latter", dummy);
      m_Stopwords.put("latterly", dummy);
      m_Stopwords.put("least", dummy);
      m_Stopwords.put("less", dummy);
      m_Stopwords.put("lest", dummy);
      m_Stopwords.put("let", dummy);
      m_Stopwords.put("like", dummy);
      m_Stopwords.put("liked", dummy);
      m_Stopwords.put("likely", dummy);
      m_Stopwords.put("little", dummy);
      m_Stopwords.put("ll", dummy); //added to avoid words like you'll,I'll etc.
      m_Stopwords.put("look", dummy);
      m_Stopwords.put("looking", dummy);
      m_Stopwords.put("looks", dummy);
      m_Stopwords.put("ltd", dummy);
      m_Stopwords.put("m", dummy);
      m_Stopwords.put("mainly", dummy);