Output parameters don't works

[ksubileau]

Hi,
There are some problems with ouput arguments. If I write, for example :

String = autoclass('java.lang.String')
string = String("word".encode('utf-8'))
btarray= [0]*4
string.getBytes(0,4,btarray,0)
print btarray

It output :

[0, 0, 0, 0]

So the output argument(btarray) is not written
Same with :

[.....]
usbConnection = cast('android.hardware.usb.UsbDeviceConnection', UsbManager.openDevice(dev))
response= [0]*4
usbConnection.bulkTransfer(epIN, response, 4, 1000); # Try to read from USB (Host Mode API)
print response

If I use a bytearray (btarray=bytearray()), I get this error :

Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/sdcard/testAn.py", line 13, in <module>
    string.getBytes(0,4,btarray,0)
  File "jnius_export_class.pxi", line 813, in jnius.jnius.JavaMultipleMethod.__call__ (jnius/jnius.c:17292)
JavaException: No methods matching your arguments

And if I use a list (btarray=list()), I get this :

Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/sdcard/testAn.py", line 13, in <module>
    string.getBytes(0,4,btarray,0)
  File "jnius_export_class.pxi", line 819, in jnius.jnius.JavaMultipleMethod.__call__ (jnius/jnius.c:17414)
  File "jnius_export_class.pxi", line 577, in jnius.jnius.JavaMethod.__call__ (jnius/jnius.c:15021)
  File "jnius_export_class.pxi", line 658, in jnius.jnius.JavaMethod.call_method (jnius/jnius.c:15691)
  File "jnius_utils.pxi", line 39, in jnius.jnius.check_exception (jnius/jnius.c:2200)
JavaException: JVM exception occured

Thanks a lot.

[ksubileau]

I suggest you to add this simple unit test that fails with the latest version available today :

tests/org/jnius/OutputParams.java :

package org.jnius;

public class OutputParams {
    public void sumarray(int[] intarray) {
        for (int i = 1; i<intarray.length; ++i) {
            intarray[0] += intarray[i];
        }
    }
}

tests/test_outputparams.py :

import unittest
from jnius import autoclass

OutputParams = autoclass("org/jnius/OutputParams");

class OutputParamsTest(unittest.TestCase):
    def test_outputparams(self):
        output = OutputParams()
        intarray = [1,4,5]
        output.sumarray(intarray)
        self.assertEqual(intarray[0], sum(intarray))