null field in ResultSet

[2001 JI Open Discussion]

By: Mihai Gheorghiu - tanethq

null field in ResultSet

2002-02-19 10:29

How does JR treat nulls in ResultSets?

Thank you all.

 

 

By: Teodor Danciu - teodord

RE: null field in ResultSet

2002-02-20 09:27

 

Hi,

 

There is only one thing users should

know about when working with expressions:

 

If JasperReports encounters a NullPointerException

when evaluating an expression,

it ignores this exception and the entire

expression will evaluate to null.

Any other caught exceptions, are wrapped

in a JRException and throw up the call stack.

 

To avoid displaying the "null" text in the text

fields, there is a flag called "isBlankWhenNull"

in the "textField" element.

 

Null fields in the ResultSet are not

treated differently.

You should consider handling null values

in fields to avoid any problems.

 

Thanks,

Teodor