import java.util.*;
import java.io.*;
import org.xml.sax.*;
import org.w3c.dom.*;
import com.sun.xml.parser.Resolver;
import com.sun.xml.tree.XmlDocument;

public class XMLResourceBundle extends ResourceBundle {

   private Hashtable hashcontents = null;

   // --------------------------------------
   // constructor <- XML file, Lang name
   // --------------------------------------
   public XMLResourceBundle(String tmxfile, String language)
   {
      convertTMXtoHash (tmxfile, language);
   }

   // --------------------------------------
   // TMX to Hashtable conversion
   // --------------------------------------
   public void convertTMXtoHash (String xmlfile, 
         String language)
   {
      File file = null;
      InputSource input = null;
      Document document = null;

      // Create Document with Sun's parser
      try{
         file = new File(xmlfile);
         input = Resolver.createInputSource(file.toURL(), 
            false);
         document = XmlDocument.createXmlDocument(input, false);
      }
      catch (SAXException 
         e){System.out.println(e.getMessage());}
      catch (IOException 
         e){System.out.println(e.getMessage());}

      // Make a list of Term Units & count the number of itmes
      NodeList listOfTermUnits = 
         document.getElementsByTagName("tu");
      int numberOfTermUnits = listOfTermUnits.getLength();

      // locals
      String temp_key = null;
      String temp_value = null;
      NamedNodeMap temp_list = null;
      Attr temp_attr = null;
      NodeList listOfTUVs = null;
      NodeList listOfSEG = null;
      Element SEGElements = null;
      int numberOfTUVs = 0;

      // set hash size
      hashcontents = new Hashtable(numberOfTermUnits);
      for (int i = 0; i < numberOfTermUnits; i ++)
      {
         // (1) -- set a key
         temp_list = listOfTermUnits.item(i).getAttributes();
         temp_attr = (Attr)temp_list.item(0);
         temp_key = temp_attr.getValue();

         // (2) -- get a value
         // --Make a TUV list => "listOfTUVs"
         Node TUVs = listOfTermUnits.item(i);
         if (TUVs.getNodeType() == Node.ELEMENT_NODE){
            Element TUVElements = (Element)TUVs;

            listOfTUVs = TUVElements.getElementsByTagName("tuv");
            numberOfTUVs = listOfTUVs.getLength();
            }

         // -- Check each TUV. If it's a specified lang, then 
         // get a SEG value for (int j = 0; j < numberOfTUVs; 
         // j++)
         {
            temp_list = listOfTUVs.item(j).getAttributes();
            temp_attr = (Attr)temp_list.item(0);
            if (temp_attr.getValue().equals(language)){
               // -- Get a SEG value
               SEGElements = (Element)listOfTUVs.item(j);
               listOfSEG = 
                  SEGElements.getElementsByTagName("seg");
               temp_value = 
                  listOfSEG.item(0).getFirstChild().getNodeValue();
               }
            }
         // -- Populate hashtable
         if (temp_key != null && temp_value != 
            null) hashcontents.put(temp_key, temp_value);      
         }// for loop
      }// convert

   // --------------------------------------
   // handleGetObject
   // --------------------------------------
   public final Object handleGetObject (String key) throws 
      MissingResourceException {
      return hashcontents.get(key);
      }

   // --------------------------------------
   // Define getKeys method
   // --------------------------------------
   public Enumeration getKeys(){
      // Not inplemented here
      // See ListResourceBundle.java
      return null;
   }
}