Compiling XPaths

package org.ananas.hc.compiler;

import java.util.Map;
import java.util.HashMap;
import java.util.Iterator;
import org.ananas.hc.QName;

public class DFATable
{
   public Map symbols;
   public int[][] dtran;
   public Object[] astate;

   public DFATable(QName[] qnames,int[][] dtran,Object[] astate)
   {
      symbols = new HashMap();
      for(int i = 0;i < qnames.length;i++)
         symbols.put(qnames[i],new Integer(i));
      this.dtran = dtran;
      this.astate = astate;
   }

   public int move(QName qname,int state)
   {
      Integer key = (Integer)symbols.get(qname);
      if(key != null)
         return dtran[state < 0 ? 0 : state][key.intValue()];
      else
         return -1;
   }

   public boolean isAcceptingState(int state)
   {
      return state < 0 ? false : astate[state] != null;
   }

   public Object getAssociatedData(int state)
   {
      return state < 0 ? null : astate[state];
   }

   public String toString()
   {
      StringBuffer buffer = new StringBuffer();
      Iterator iterator = symbols.entrySet().iterator();
      while(iterator.hasNext())
      {
         Map.Entry entry = (Map.Entry)iterator.next();
         buffer.append('#');
         buffer.append(entry.getValue().toString());
         buffer.append(' ');
         buffer.append(entry.getKey().toString());
         buffer.append('\n');
      }
      for(int i = 0;i < dtran.length;i++)
      {
         for(int j = 0;j < dtran[i].length;j++)
         {
            String st = Integer.toString(dtran[i][j]);
            for(int z = 0;z < 4 - st.length();z++)
               buffer.append(' ');
            buffer.append(dtran[i][j]);
         }
         buffer.append('\n');
      }
      for(int i = 0;i < astate.length;i++)
      {
         buffer.append('#');
         buffer.append(i);
         buffer.append(' ');
         buffer.append(astate.toString());
         buffer.append('\n');
      }
      return buffer.toString();
   }
}