[using $X in the query, Parameter type not supporte]

managed to find something that works:

Arrays.asList(new Integer(1100), new Integer(1210))

or more simple

Arrays.asList(1100,1210)

[using $X in the query, Parameter type not supporte]

hello,

I am trying to set a list of integers as a default parameter in ireport.

For example - as I would here:

query ...

where
    product_id in (1100, 1210)

This is working fine.

But if I try,

My parameter - mycollection (type - collection)

query ...

where
    $X(IN, product_id, mycollection)

default value, as per the above messages I am cut/paste exactly "java.util.Arrays.asList(new java.lang.Integer[]{new java.lang.Integer(1), new java.lang.Integer(2)})" into the default value expression ...

However this is not working - am I doing something wrong? 

help appreciated