deviceimpl.java

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                    // children and notify the bus
                    if(Windows.debugEnum) System.out.println(" >> BEFORE <<  a different EXTERNAL HUB was connected to this (root)hub. Former Hub ID:" + oldDev.getUniqueDeviceID());
   
                    if(Windows.debugEnum) System.out.println("DeviceImpl.enumerateHubPorts() >>> TO DO << remove all former chlidren of the hub and the hub itself too. Add the new hub.");
                    removeAllChildren(oldDev.getChildren());
                    bus.removeDevice(oldDev);
                    // add the new hub
                    // depending on the friendlyDeviceName we create either a JSUB instance or a NonJUSB instance
                    if(friendlyDeviceName != null && friendlyDeviceName.startsWith(Windows.A_JUSB_DRIVER))
                        dev = new JUSB(usb,this,devPath,devAddress,driverKeyName,friendlyDeviceName,uniqueID,portIndex);
                    else
                        dev = new NonJUSB(usb,this,devPath,devAddress,driverKeyName,friendlyDeviceName,uniqueID,portIndex);

                    hub.children[portIndex-1] = dev;
                    bus.addDevice(dev,devAddress); 
                   }
                   else{
                     // the device is still the same one
                     // check if the children are identical
                     // add it again as a child of this hub.
                     hub.children[portIndex-1] = oldDev;  
                    if(Windows.debugEnum) System.out.println("DeviceImpl.enumerateHubPorts() >>> BEFORE <<  the same one : Check now if its children changed.");
                       
                     checkChildren(oldDev);                     
                   }
                }
                else{
                    // there was no hub attached before
                    // add this new hub now to the bus
                    if(Windows.debugEnum) System.out.println(" >> BEFORE <<   no connection");
                    if(Windows.debugEnum) System.out.println("DeviceImpl.enumerateHubPorts() >>> TO DO << Add the new hub. This includes also all children, which are attached to this new hub.");

                    if(friendlyDeviceName != null && friendlyDeviceName.startsWith(Windows.A_JUSB_DRIVER))
                        dev = new JUSB(usb,this,devPath,devAddress,driverKeyName,friendlyDeviceName,uniqueID,portIndex);
                    else
                        dev = new NonJUSB(usb,this,devPath,devAddress,driverKeyName,friendlyDeviceName,uniqueID,portIndex);
                    
                    hub.children[portIndex-1] = dev;
                    bus.addDevice(dev,devAddress); 
                }
             
                
            }else if(devType == NO_DEVICE_CONNECTED){
                // there is no device connected to this port
                
                //check if there was before a device connected to this port
                if(Windows.debugEnum) System.out.print("DeviceImpl.enumerateHubPorts() >>> NOW on Port["+portIndex+"]<< No device connected" );
               

                if(oldChildren != null){
                 oldDev = oldChildren[portIndex-1];   
                }
                else oldDev = null;
             
                 if(oldDev != null ){
                    // we had a device connected to the bus
                    // but not anymore. remove it
                    //check whether the device was a hub or just a simple device
                    if(oldDev.getChildren() == null){
                        if(Windows.debugEnum) System.out.println(" >> BEFORE <<  a DEVICE was connected to this (root)hub.Former Device ID:" + oldDev.getUniqueDeviceID());
                        //just one device
                        bus.removeDevice(oldDev);
                    }
                    else{
                      if(Windows.debugEnum) System.out.println(" >> BEFORE <<  an EXTERNAL HUB was connected to this (root)hub. Former Hub ID:" + oldDev.getUniqueDeviceID());
                       // it's a hub. remove the hub and all its children
                       if(Windows.debugEnum) System.out.println("DeviceImpl.enumerateHubPorts() >>> TO DO << cremove all former chlidren of the hub and the hub itself too." );

                       removeAllChildren(oldDev.getChildren());
                       bus.removeDevice(oldDev);
                    }

                 }
                 else  if(Windows.debugEnum) System.out.println(" >> BEFORE << also no connection");
                
                 // add null to the bus
                hub.children[portIndex-1] = null;

                if(Windows.debugDeviceImpl)
                    System.out.println("DeviceImpl.enumerateHubPorts() >>> EnumPort:" + portIndex + "  Address:" + this.getAddress() + "  Device: null");
                
            }else{
                if(Windows.debugDeviceImpl)
                    System.out.println("DeviceImpl.enumerateHubPorts() >>> EnumPort:" + portIndex + "  Address:" + this.getAddress() + "  Device: null");
                
              throw new USBException("Unknown Device Type! Device Error Reason: " + devType,devType);
            }
        }// end for 
         // at this point we did enuerate all Devices but only if the hub.getAddress is 0
        // this is used for synchronization while scanning the bus
        if(hub.getAddress() == 0) bus.setFinishEnumerating();
     }
    
    /** Returns the device path of that device
     * @return The device path or null
     */    
    public String getDevicePath(){
        return this.usbDevicePath;
    }
    
    /** Returns the friendly device name
     * @return The friendly device name or null
     */    
    public String getDeviceFriendlyName(){
     return this.friendlyDeviceName;   
    }
    
    /** Returns the unique ID
     * @return The unique ID String or null
     */    
    public String getUniqueDeviceID(){
     return this.uniqueDevID;   
    }
    
    private DeviceImpl [] getChildren(){
      return children;
    }
    
    /** Removes all the children from the bus
     * @param children All the children of this hub
     */    
    synchronized void removeAllChildren(DeviceImpl children[]){
     DeviceImpl dev;  
     if(Windows.debugEnum) System.out.println("DeviceImpl.enumerateHubPorts() >>> remove all children of this hub! numOfChildren= " + children.length);
     for(int i=0; i < children.length; i++){
         
       dev = children[i];
       if(dev != null){
          if(dev.getChildren() != null){
              if(Windows.debugEnum) System.out.println("DeviceImpl.enumerateHubPorts() >>> there was a HUB on Port[ "+ dev.getHubPortNum()+ "]. remove it from the list! Device: " + dev.getUniqueDeviceID() + " Addr[" + dev.getAddress() + "]");
              removeAllChildren(dev.getChildren());
          }
          else{
              if(Windows.debugEnum) System.out.println("DeviceImpl.enumerateHubPorts() >>> there was a DEVICE on Port[ "+ dev.getHubPortNum()+ "]. remove it from the list! Device: " + dev.getUniqueDeviceID() + " Addr[" + dev.getAddress() + "]");
              usb.removeDevice(dev);
          }
       }
       else{
         if(Windows.debugEnum) System.out.println("DeviceImpl.enumerateHubPorts() >>> The " + i + ".th DEVICE was null");
       }
     }
    }
    
    /**
     * The hub is identical, we therefore have to check if the children
     * are still the same and when not doing the necessary changes.
     * We get a current handle to the hub and let enumerate the hub 
     * recursivly.
     *
     */
    void checkChildren(DeviceImpl hub) throws IOException{
 
      int hubHandle = hub.openHandle(hub.getDevicePath());
      if(hubHandle == USBException.ERROR_INVALID_HANDLE)
                throw new USBException("INVALID_HANDLE_VALUE for external hub ",hubHandle);
            
      if(Windows.debugDeviceImpl) System.out.println("DeviceImpl.checkChildren() >>> External Hub (hubHandle:" + hubHandle + "numPorts:" + this.numPorts+")");
      this.enumerateHubPorts(usb, hubHandle,hub,hub.getNumPorts());
      // close the hub handle
      this.closeHandle(hubHandle);
    }
    
    /** For debugging purposes */    
    synchronized void showAllChildren(DeviceImpl children[]){
     DeviceImpl dev;  
     if(Windows.debugEnum) System.out.println("DeviceImpl.checkChildren() >>> show all children of this hub! numOfChildren= " + children.length);
     for(int i=0; i < children.length; i++){
         
       dev = children[i];
       if(dev != null){
          if(dev.getChildren() != null){
              if(Windows.debugEnum) System.out.println("DeviceImpl.checkChildren() >>> there is a HUB on Port[ "+ dev.getHubPortNum()+ "].  Device: " + dev.getUniqueDeviceID() + " Addr[" + dev.getAddress() + "]");
              showAllChildren(dev.getChildren());
          }
          else{
              if(Windows.debugEnum) System.out.println("DeviceImpl.checkChildren() >>> there is a DEVICE on Port[ "+ dev.getHubPortNum()+ "]. Device: " + dev.getUniqueDeviceID() + " Addr[" + dev.getAddress() + "]");
          }
       }
       else{
         if(Windows.debugEnum) System.out.println("DeviceImpl.checkChildren() >>> The " + i + ".th DEVICE was null");
       }
     }
    }

       private void printDevices(DeviceImpl [] dev) {
        try{
        if(dev != null){    
            int length;
            if(dev.length < 7) length = dev.length;
            else length = 8;
            for(int i = 0; i < length; i++){
               if(dev[i] != null){
                   if(dev[i].getAddress() == 0)        System.out.println(" [ROOT]          numOfPort:" + dev[i].getNumPorts()+"  Address:" + dev[i].getAddress());
                   else if(dev[i].getNumPorts() > 0)   System.out.println(" [EXTERNAL HUB]  numOfPort:" + dev[i].getNumPorts()+"  Address:" + dev[i].getAddress() + "  UniqueID[" + dev[i].getUniqueDeviceID() + "]");
                   else System.out.println(" [USB DEVICE]                 Address:" + dev[i].getAddress() + "  UniqueID[" + dev[i].getUniqueDeviceID() + "]");
                }
               else System.out.println(" [NULL] ");
            }
          }
        }catch(Exception e){
	    e.printStackTrace ();
        }
    }

       /**
     * print a Byte Array to String
     * main purpose is for debugging matters
     * name: The name of the array, just for clarifying the output
     * radix: 0: decimal 2: binary (default 2)
     * numOfByteLine: the number of Byte printed at one line
     */
    public void printByteArray(byte buf[], String title,int radix, int numOfBytesLine){
       
       if(buf != null){ 
       String temp = null;
       if(radix != 0 && radix != 2 && radix!=16) radix = 2;
       
       if(title != null) System.out.println(title);
       for(int i=0; i<buf.length; i++){
           
           if(radix == 2){
                temp = Integer.toBinaryString((int)buf[i]);
                if(temp.length() > 8){
                    temp = temp.substring(temp.length() - 8, temp.length());
                }
                else if(temp.length() < 8){
                    for(int k=temp.length(); k < 8; k++)   
                    temp = "0" + temp;
                 }
           }
           
           if(radix == 16){
                temp = Integer.toHexString((int)buf[i]);
                if(temp.length() > 2){
                    temp = temp.substring(temp.length() - 2, temp.length());
                }
                if(temp.length() < 2){
                    for(int k=temp.length(); k < 2; k++)   
                    temp = "0" + temp;
                 }
           }
           
           
           if(radix == 0) System.out.print(buf[i] + "   ");
           else System.out.print(temp + "   ");
           
           if(i > 0 && (i % numOfBytesLine) == 0) System.out.println();
       }
       
       System.out.println(); 
       }
       else System.out.println("Buffer is Empty: buf == null!!!"); 
    }    
    
    /** Not implemented yet!<br>
     * Returns always null!
     */
    public String getSpeed() {
        return null;
    }
    
}