gt: 	if (labelStr != null) {
context: /*
   Copyright (C) 2010 by
   * 
   * 	Cam-Tu Nguyen 
   *  ncamtu@ecei.tohoku.ac.jp or ncamtu@gmail.com
   *
   *  Xuan-Hieu Phan  
   *  pxhieu@gmail.com 
   *
   *  College of Technology, Vietnamese University, Hanoi
   * 	Graduate School of Information Sciences, Tohoku University
   *
   * JVnTextPro-v.2.0 is a 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.
   *
   * JVnTextPro-v.2.0 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  JVnTextPro-v.2.0); if not, write to the Free Software Foundation,
   * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
   */
  
  package jmaxent;
  
  import java.util.*;
  
  // TODO: Auto-generated Javadoc
  /**
   * The Class Feature.
   */
  public class Feature {
  
      /** The idx. */
      public int idx = -1; // feature index
      
      /** The str id. */
      public String strId = ""; // string identifier
      
      /** The label. */
      public int label = -1; // label
      
      /** The cp. */
      public int cp = -1; // context predicate
      
      /** The val. */
      public float val = 1; // feature value
      
      /** The wgt. */
      public double wgt = 0.0; // feature weight
  
      /**
       * Instantiates a new feature.
       */
      public Feature() {
      }
      
      /**
       * Instantiates a new feature.
       *
       * @param label the label
       * @param cp the cp
       */
      public Feature(int label, int cp) {
  	FeatureInit(label, cp);
      }
      
      /**
       * Instantiates a new feature.
       *
       * @param label the label
       * @param cp the cp
       * @param fmap the fmap
       */
      public Feature(int label, int cp, Map fmap) {
  	FeatureInit(label, cp);
  	strId2IdxAdd(fmap);
      }
  
      // create a feature from a string (e.g., reading from model file)    
      /**
       * Instantiates a new feature.
       *
       * @param str the str
       * @param cpStr2Int the cp str2 int
       * @param lbStr2Int the lb str2 int
       */
      public Feature(String str, Map cpStr2Int, Map lbStr2Int) {	
  	FeatureInit(str, cpStr2Int, lbStr2Int);
      }
      
      // create a feature from a string and add it to the feature map
      /**
       * Instantiates a new feature.
       *
       * @param str the str
       * @param cpStr2Int the cp str2 int
       * @param lbStr2Int the lb str2 int
       * @param fmap the fmap
       */
      public Feature(String str, Map cpStr2Int, Map lbStr2Int, Map fmap) {
  	FeatureInit(str, cpStr2Int, lbStr2Int);
  	strId2IdxAdd(fmap);
      }
      
      /**
       * Feature init.
       *
       * @param label the label
       * @param cp the cp
       */
      public void FeatureInit(int label, int cp) {
  	this.label = label;
  	this.cp = cp;
  	strId = Integer.toString(label) + " " + Integer.toString(cp);
      }
      
      /**
       * Feature init.
       *
       * @param str the str
       * @param cpStr2Int the cp str2 int
       * @param lbStr2Int the lb str2 int
       */
      public void FeatureInit(String str, Map cpStr2Int, Map lbStr2Int) {
  	StringTokenizer strTok = new StringTokenizer(str, " \t\r\n");
  	// <label> <cp> <idx> <wgt>
  	
  	int len = strTok.countTokens();
  	if (len != 4) {
  	    return;
  	}
  	
  	String labelStr = strTok.nextToken();
  	String cpStr = strTok.nextToken();
  	int idx = Integer.parseInt(strTok.nextToken());
  	float val = 1;
  	double wgt = Double.parseDouble(strTok.nextToken());
  	
  	Integer labelInt = (Integer)lbStr2Int.get(labelStr);
  	Integer cpInt = (Integer)cpStr2Int.get(cpStr);
  	FeatureInit(labelInt.intValue(), cpInt.intValue());
  	
  	this.idx = idx;
  	this.val = val;
  	this.wgt = wgt;
      }
      
      // mapping from string identifier to feature index
      /**
       * Str id2 idx.
       *
       * @param fmap the fmap
       * @return the int
       */
      public int strId2Idx(Map fmap) {
  	Integer idxInt = (Integer)fmap.get(strId);
  	if (idxInt != null) {
  	    this.idx = idxInt.intValue();
  	}
  	
  	return this.idx;
      }
      
      // mapping from string identifier to feature index (adding feature to the map
      // if the mapping does not exist
      /**
       * Str id2 idx add.
       *
       * @param fmap the fmap
       * @return the int
       */
      public int strId2IdxAdd(Map fmap) {
  	strId2Idx(fmap);
  	
  	if (idx < 0) {
  	    idx = fmap.size();
  	    fmap.put(strId, new Integer(idx));
  	}
  	
  	return idx;
      }
      
      // return the feature index
      /**
       * Index.
       *
       * @param fmap the fmap
       * @return the int
       */
      public int index(Map fmap) {
  	return strId2Idx(fmap);
      }
      
      // convert feature to string: "<label> <cp> <idx> <weight>"
      /**
       * To string.
       *
       * @param cpInt2Str the cp int2 str
       * @param lbInt2Str the lb int2 str
       * @return the string
       */
      public String toString(Map cpInt2Str, Map lbInt2Str) {
  	String str = "";
  	
  	String labelStr = (String)lbInt2Str.get(new Integer(label));
  