topic Re: Listing incoming Fields in Table Widget in Talend Studio

Listing incoming Fields in Table Widget

sj_a — Fri, 02 Jan 2026 14:45:42 GMT

Dear Community,

right now i am trying to write a custom component for talend and i am not able to list input fields in a Table widget. It is shown in the documentary here under "Table" (https://talend.github.io/component-runtime/main/1.32.0/gallery.html) that it is possible, but it is not further explained and also not referenced in die provided example project.

I also tried to implement it as shown in another article in the documentary but that example is also missing alot of info.

(https://talend.github.io/component-runtime/main/1.32.0/studio-schema.html9)

I tried to implement it exactly like here but when compiling i et the error

>No source instantiable without adding parameters for @DataSet("CustomDataset")

Does anyone have any experience with it and guide me in the right direction?

Thanks in advance

Re: Listing incoming Fields in Table Widget

ozhelezniak — Mon, 26 Apr 2021 10:32:22 GMT

Hello @Sammy Joel

You need to add the Input(Source) part of the connector.

https://talend.github.io/component-runtime/main/1.32.0/component-define-input.html

And the Input(Source) part should use the dataset to configure itself.

Re: Listing incoming Fields in Table Widget

sj_a — Mon, 26 Apr 2021 11:55:51 GMT

Thanks for your reply @Oleksandr Zhelezniak

But i am trying to implement it for a processor component. I am trying to add 2 inputs to the processor map them to specific values in a table widget in a component and then output them. Kind of like the tJoin where i can select inside to component which fields from the input i want to use. Do i still need a Dataset for that?

Re: Listing incoming Fields in Table Widget

ozhelezniak — Mon, 26 Apr 2021 14:31:38 GMT

@Sammy Joel

"No source instantiable without adding parameters for @DataSet("CustomDataset""

It says that you declared some class and annotated it with org.talend.sdk.component.api.configuration.type.DataSet.

For each dataset, the framework expects an input (source) component.

Did you try to remove that dataset class?

Re: Listing incoming Fields in Table Widget

sj_a — Mon, 26 Apr 2021 20:38:34 GMT

Yes i tried multiple variations with and without datasets. Whenever i add the @Structure to the List it just "dissapears"

Re: Listing incoming Fields in Table Widget

ozhelezniak — Tue, 27 Apr 2021 10:46:50 GMT

Hm, @_Structure

It starts to be the part of "Schema" button.

Edited. I read again the original question and find out that you have that article. Sorry about that

Re: Listing incoming Fields in Table Widget

ozhelezniak — Tue, 27 Apr 2021 11:32:58 GMT

Remove @_Dataset annotation from your configuration class.