Merge "USB MIDI: Reset counter after unique codes full" into tm-dev

    private final HashMap<String, ArrayList<UsbDirectMidiDevice>>

            mMidiDevices = new HashMap<String, ArrayList<UsbDirectMidiDevice>>();

    private final HashSet<String> mMidiUniqueCodes = new HashSet<String>();

    private static final int MAX_UNIQUE_CODE_GENERATION_ATTEMPTS = 10;

    private final Random mRandom = new Random();

    private final boolean mHasMidiFeature;

    // Generate a 3 digit code.

    private String generateNewUsbDeviceIdentifier() {

        String code;

        int numberOfAttempts = 0;

        do {

            if (numberOfAttempts > MAX_UNIQUE_CODE_GENERATION_ATTEMPTS) {

                Slog.w(TAG, "MIDI unique code array resetting");

                mMidiUniqueCodes.clear();

                numberOfAttempts = 0;

            }

            code = "";

            for (int i = 0; i < 3; i++) {

                code += mRandom.nextInt(10);

            }

            numberOfAttempts++;

        } while (mMidiUniqueCodes.contains(code));

        mMidiUniqueCodes.add(code);

        return code;