import java.io.File;
import java.io.IOException;
import java.io.PrintStream;
import java.io.FileInputStream;
import java.util.ArrayList;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.FactoryConfigurationError;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.DocumentBuilder;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.w3c.dom.Document;
import org.w3c.dom.DOMException;

/**
 * read a services xml doc in and pick out the necessary bits of info
 */

public class svcgrp
{ 
    protected int servicenum;
    protected ArrayList servicename = new ArrayList();
    protected ArrayList serviceport = new ArrayList();
    protected ArrayList servicetype = new ArrayList();
    protected ArrayList serviceprotocol = new ArrayList();
    protected ArrayList serviceexternal = new ArrayList();

    String getDataFromNode( org.w3c.dom.Node nod )
    {
    	org.w3c.dom.NodeList nodes = nod.getChildNodes();
    	for ( int i=0; i< nodes.getLength(); i++ )
    	{
            org.w3c.dom.Node node = nodes.item(i);
            int type = node.getNodeType();
            String val = node.getNodeValue();
            String name = node.getNodeName();

            if ( type == 3 )
    	    {
    		if ( val != null )
    		{
    		    return( val );
    		}
    	    }
    	}
    	return( null );
    }

    String getDataFromNode( org.w3c.dom.Node nod, String str )
    {
    	org.w3c.dom.NodeList nodes = nod.getChildNodes();
    	for ( int i=0; i< nodes.getLength(); i++ )
    	{
            org.w3c.dom.Node node = nodes.item(i);
            int type = node.getNodeType();
            String val = node.getNodeValue();
            String name = node.getNodeName();

//    		System.out.println( "type: " + type + " nodename: " + name + " value: " + val ); 
    		if ( type == 1 && name != null )
    		{
    			if ( name.equals( str ))
    			{
    				if ( node.hasChildNodes() )
    				{
                		org.w3c.dom.NodeList nads = node.getChildNodes();
    					for ( int j = 0; j < nads.getLength(); j++ )
    					{
    						node = nads.item(j);
    						type = node.getNodeType();
    						val = node.getNodeValue();
    						name = node.getNodeName();
    						if ( type == 3 && val != null )
    						{
    							return( val );
    						}
    					}
    				}

    			}
    			
    		}
    	}
    	return( null );
    }
    	
    void recurseNodes( org.w3c.dom.NodeList nodes ) throws IOException
    {
        for (int i=0; i<nodes.getLength(); i++)
    	{
            org.w3c.dom.Node node = nodes.item(i);
            int type = node.getNodeType();
            String val = node.getNodeValue();
            String name = node.getNodeName();

    		if ( type == 1 && name != null )
    		{
    			if ( name.equals( "service" ))
    			{
    				servicename.add( getDataFromNode( node, "name" ));
    				serviceport.add( getDataFromNode( node, "port" ));
    				servicetype.add( getDataFromNode( node, "type" ));
    				serviceprotocol.add( getDataFromNode( node, "protocol" ));
    				serviceexternal.add( getDataFromNode( node, "external" ));
    				servicenum++;
//    				System.out.println( "service/port: " + serviceport.get( i ) ); 
    			}
    		}
            if ( node.hasChildNodes() )
            {
                org.w3c.dom.NodeList nodeList = node.getChildNodes();
                recurseNodes( nodeList );
            } 
        }
    }
    
    void getServiceInfo( String fName )
    {
    	Document doc;
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
//    	System.out.println( "Working on " + fName );
        try 
    	{
    		DocumentBuilder builder = factory.newDocumentBuilder();
    		File f = new File( fName );
    		FileInputStream fs = new FileInputStream( f );
    		doc = builder.parse( fs );

    		doc.getDocumentElement().normalize();
//    		System.out.println("Root element is " + doc.getDocumentElement().getNodeName() + " ");
    		org.w3c.dom.NodeList nodeList = doc.getChildNodes();
    		recurseNodes( nodeList );
        } 
    	catch (SAXParseException spe)
    	{
           // Error generated by the parser
           System.out.println( "\n** Parsing error"
              + ", line " + spe.getLineNumber ()
              + ", uri " + spe.getSystemId ());
           System.out.println("   " + spe.getMessage() );

           // Use the contained exception, if any
           Exception  x = spe;
           if ( spe.getException() != null )
               x = spe.getException();
           x.printStackTrace();
           return;
        } 
    	catch (SAXException sxe)
    	{
           // Error generated by this application
           // (or a parser-initialization error)
           Exception  x = sxe;
           if (sxe.getException() != null)
               x = sxe.getException();
           x.printStackTrace();
           return;
        } 
    	catch (ParserConfigurationException pce)
    	{
            // Parser with specified options can't be built
            pce.printStackTrace();
    		return;
        } 
    	catch (IOException ioe)
    	{
           // I/O error
           ioe.printStackTrace();
           return;
        }
    } // eo printDomTree

}