Java Distance node: generalization and iteration over all input columns

Hello everybody,

I'm trying to use Java Distance node in order to define a customized distance type. In the description node the Euclidean distance definition of the columns c1 and c2 is exemplified as:

sqrt(sqr($row1.c1$-$row2.c1$)+sqr($row1.c2$-$row2.c2$))

Is it possible to generalize the formula in order to iterate over all the columns coming in input? This is especially important if the number of column is large and cannot be edited by hand.

Thanks in advance for any suggestion.

Best,

Gio