@Override public GpioPin provisionPin(GpioProvider provider, Pin pin, String name, PinMode mode) { // if an existing pin has been previously created, then throw an error for (GpioPin p : pins) { if (p.getProvider().equals(provider) && p.getPin().equals(pin)) { throw new GpioPinExistsException(pin); } } // create new GPIO pin instance GpioPin gpioPin = new GpioPinImpl(this, provider, pin); // set the gpio pin name if (name != null) { gpioPin.setName(name); } // export this pin gpioPin.export(mode); // add this new pin instance to the managed collection pins.add(gpioPin); // return new new pin instance return gpioPin; }