topic Re: In tMap, my variable can't be null : java.lang.NullPointerException error in Talend Studio

In tMap, my variable can't be null : java.lang.NullPointerException error

CatherineT — Fri, 15 Nov 2024 22:16:01 GMT

Hello,

I need to create a variable in the middle part of a tMap component.

This variable should be a byte type variable.

It is calculated by testing a char type input data (through a global routine) :

If CharData = 'A' Then 1

Else if CharData = 'B' Then 0

Else null

The problem is that I have the following message error : java.lang.NullPointerException

I think that it is due to the fact that the variable is null because the char data is blank.

Does it mean that a variable can't be null ?!

Re: In tMap, my variable can't be null : java.lang.NullPointerException error

jlolling — Mon, 19 Dec 2022 18:07:13 GMT

It depends how you have configured the variable. If the variable is also not null configured that you will get this Exception.

Re: In tMap, my variable can't be null : java.lang.NullPointerException error

Anonymous — Tue, 20 Dec 2022 05:21:27 GMT

Hello,

Could you please post your tMap component setting screenshots here which will be helpful for us to address your issue?

Best regards

Sabrina

Re: In tMap, my variable can't be null : java.lang.NullPointerException error

CatherineT — Tue, 20 Dec 2022 07:53:47 GMT

Hello,

Here is the job I use to test.

This is working :

But I need to calculate QCDemandeNu in the middle part of the tMap, because I'll use it to calculate other variables.

So this the tMap I would like to use :

The problem is that I can't use the type Byte (which allows null values) in the variable part, whereas I can in the output part of the tMap.

Re: In tMap, my variable can't be null : java.lang.NullPointerException error

corentin1 — Tue, 20 Dec 2022 14:18:17 GMT

In your screenshot, var1 is not set as "nullable". Make sure that in tMap you have checked the 'nullable' checkbox , which is near the name of your variable (unchecked by default)

Re: In tMap, my variable can't be null : java.lang.NullPointerException error

CatherineT — Tue, 20 Dec 2022 15:15:16 GMT

Thank you very much Corentin !

Iv've never noticed that checkbox before !!!

"The devil is in the details"