pyhelpers: helping with list conversions

Disclaimer: I'm not used to JCC, so I may have missed something obvious :)

I use the following 2 functions when passing Python lists to Orekit functions expecting arrays or lists.
element_type is optional, only required for empty lists. Only lists of objects are supported, not lists of primitive types.

def to_java_array(elements, element_type=None):
    """Convert a Python list of objects to a Java array."""
    if elements is None:
        return None
    if not element_type:
        if elements:
            element_type = elements[0].__class__
        else:
            raise RuntimeError('to_java_array error: element_type is required if elements is empty')
    return JArray('object')(elements, element_type)

def to_java_list(elements, element_type=None):
    """Convert a Python list of objects to a Java list."""
    if elements is None:
        return None
    if not element_type:
        if elements:
            element_type = elements[0].__class__
        else:
            raise RuntimeError('to_java_list error: element_type is required if elements is empty')
    ret = ArrayList().of_(element_type)
    for element in elements:
        ret.add(element)
    return ret

# example:
s2p_list = [S2Point(...), S2Point(...), ...]
aoi = SphericalPolygonsSet(1.e-9, to_java_array(s2p_list))
# instead of:
aoi = SphericalPolygonsSet(1.e-9, JArray('object')(s2p_list, S2Point))

If this is the right way to do it, could this kind of helpers be added to pyhelpers.py? That would be easier.

Thanks