topic Column Selector in component configuration. in Talend Studio

Column Selector in component configuration.

FSchober1607791906 — Fri, 02 Jan 2026 14:45:42 GMT

Hello,

I'm trying to create a custom component, where the component reads some data from an input column. The column where the data is selected from is supposed to be selected from a dropdown menu.

I managed to create such a dropdown menu using @Proposable and @DynamicValue, but I have no way of accessing the schmema of the MAIN input connector.

Is there any way of doing this?

current code:

// in datastore

@Documentation("")

@Option

@Proposable("path_column")

String file_path;

// in service

@Documentation("")

@DynamicValues("path_column")

public Values getFilePathColumn() {

// i somehow need to return the column-names from the input schema here

}

Re: Column Selector in component configuration.

FSchober1607791906 — Sun, 13 Dec 2020 17:12:17 GMT

I just found out about the @BuiltInSuggestable(BuiltInSuggestable.Name.INCOMING_SCHEMA_ENTRY_NAMES) annotation.

Unfortunately this is not available in TS 7.1.1.

I guess there is no other way then?

Re: Column Selector in component configuration.

Anonymous — Mon, 14 Dec 2020 07:59:34 GMT

Hi @Ferdinand Schober ,

I am not a component developer, but have you already referenced the tFilterRow or tSortRow components. They have a field that allows user to select the columns from the schema of the MAIN input connector.

Regards

Shong

Re: Column Selector in component configuration.

FSchober1607791906 — Mon, 14 Dec 2020 15:19:17 GMT

where would I find the source code for those?

Re: Column Selector in component configuration.

Anonymous — Tue, 15 Dec 2020 02:31:13 GMT

You can find the source code of component in folder:

<Studio installation directory>\plugins\org.talend.designer.components.localprovider_7.3.1.20200213_1003\components

Re: Column Selector in component configuration.

FSchober1607791906 — Tue, 15 Dec 2020 15:56:43 GMT

Doesn't seem like the internal components are anythink like ones you write with the component sdk. So unfortunately this doesn't really help.

Re: Column Selector in component configuration.

Anonymous — Wed, 16 Dec 2020 02:03:41 GMT

I'm sorry I didn't help you, I will forward your question to our component developers, I hope they can provide some suggestions or ideas.

Regards

Shong