package usb.core;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import usb.core.device;


public class Main {
    public static void main(String[]args) throws IOException
    {
      try
        {
            // Bootstrap by getting the USB Host from the HostFactory.
            Host   host = HostFactory.getHost();
 
            // Obtain a list of the USB buses available on the Host.
            Bus[]  bus  = host.getBusses();
            int    total_bus = bus.length;
             System.out.println(total_bus);
            // Traverse through all the USB buses.
            for (int i=0; i<total_bus; i++)
            {
                // Access the root hub on the USB bus and obtain the
                // number of USB ports available on the root hub.
                Device root = bus[i].getRootHub();
                int total_port = root.getNumPorts();
             
                // Traverse through all the USB ports available on the 
                // root hub. It should be mentioned that the numbering 
                // starts from 1, not 0.
                for (int j=1; j<=total_port; j++)
                {
                    // Obtain the Device connected to the port.
                    Device device = root.getChild(j);
                    if (device != null)
                    {
                        // USB device available, do something here.
                         // Obtain the current Configuration of the device and the number of 
       // Interfaces available under the current Configuration.
       Configuration config = device.getConfiguration();
       int total_interface = config.getNumInterfaces();
 
       // Traverse through the Interfaces
       for (int k=0; k<total_interface; k++)
       {
           // Access the currently Interface and obtain the number of 
           // endpoints available on the Interface. 
           Interface itf = config.getInterface(k, 0);
           int total_ep  = itf.getNumEndpoints();
 
           // Traverse through all the endpoints.
           for (int l=0; l<total_ep; l++)
           {
               // Access the endpoint, and obtain its I/O type.
               Endpoint ep = itf.getEndpoint(l);
               String io_type = ep.getType();
               boolean input  = ep.isInput();
 
               // If the endpoint is an input endpoint, obtain its
               // InputStream and read in data.
               if (input)
               {
                   InputStream in;
                   in = ep.getInputStream();
                   // Read in data here
                   in.close();
               }
               // If the Endpoint is and output Endpoint, obtain its 
               // OutputStream and write out data.
               else
               {
                   OutputStream out;
                   out = ep.getOutputStream();
                   // Write out data here.
                   out.close();
               }
           }
       }
                    }
                }
            }
        } catch (Exception e)
        {
            System.out.println(e.getMessage());
        }
       
    }
            
}