topic Re: customComponent with any count of row inputs and schema output in Talend Studio

customComponent with any count of row inputs and schema output

Anonymous — Fri, 02 Jan 2026 14:45:42 GMT

Hello,

I want to create a custom component with the new talend component kit. The custom component can have more then one input. In the old version I can set min_input=1, how can I configure that with the new component kit? I see, I can add more:

@Input("myInput") final MyInput defaultInput

in the method header, but I want any number of inputs. I have try it with a list or an array. It does not work.

And how can I add a MultiSchema like we have in tFileInputMSDelimited:

I see @Option @Structure but that does not work...

Greets

Benjamin

Re: customComponent with any count of row inputs and schema output

Anonymous — Tue, 03 Jul 2018 08:51:51 GMT

Hi Benjamin,

As you mentionned, you can define N inputs using @Input (it is mentionned here in the doc). However the framework will not support a dynamic number of inputs (or outputs) nor a customizable join strategy directly for now. The solution to do it now is to define your join model in a single record, each column being an input and use an aggregation component before your processor to build the record as you intend. It will provide you the "guess schema" feature and let you have all the flexibility you need to configure the joining logic.

Romain

Re: customComponent with any count of row inputs and schema output

Anonymous — Tue, 03 Jul 2018 09:17:23 GMT

With which component can I aggregation several rows into one row?

Re: customComponent with any count of row inputs and schema output

Anonymous — Tue, 03 Jul 2018 15:30:07 GMT

A t*Map ([1]) or tXMLMap should enable you to prepare your record for your processor.

[1] https://help.talend.com/reader/tM3os~7PoPzBK28jtBNgCw/usVFZrXILonTCNdL86safA

Romain