[Geotools-gt2-users] expressionBuilder with null value

[Sergio Morstabilini]

Title: expressionBuilder with null value

Hi.

I'm using geotools 2.2 RC2 and I'm trying to use expressionBuilder to check 0 or null values. I use

ExpressionBuilder expressionBuilder = new ExpressionBuilder();
Filter myFilter = (Filter)ExpressionBuilder.parser("(myField = 0) OR (myField IS NULL)");

but I have problems with null values.
I tryed to use  "(myField = NULL)"  or "(NOT(myField < 0) AND NOT(myField > 0))" but without success.

Any hints?

Best regards,
Sergio