topic Re: Select column names from input schema to java variable. in Talend Studio

Select column names from input schema to java variable.

MPogorelov1634291005 — Fri, 02 Jan 2026 14:45:42 GMT

Hello everyone!

I use IntelliJ + Talend Component Kit.

How can I make some options in component where user can add column names from component`s schema.

I know that I must write some strings in configuration.java file. Help me please, if anybody can.

Re: Select column names from input schema to java variable.

undx — Fri, 11 Feb 2022 08:54:21 GMT

Hi @Makar Pogorelov ,

I think that you'll find what you need in the document https://talend.github.io/component-runtime/main/1.42.0/studio-schema.html#_accessing_columns_metadata

Best regards

Re: Select column names from input schema to java variable.

MPogorelov1634291005 — Fri, 11 Feb 2022 15:46:28 GMT

Yes, it really helped me. Thank you!

Maybe can you ask on another one question?

I want use Table widget and I want fill him columns` labels from recieved input schema. I tried some steps, but no one works good. It should be like:

@Option

@Documentation("Table.")

List<Column> columnList=incomingSchema;

Re: Select column names from input schema to java variable.

undx — Mon, 14 Feb 2022 08:27:24 GMT

Did you used a @structure annotation?

Re: Select column names from input schema to java variable.

MPogorelov1634291005 — Mon, 14 Feb 2022 09:06:57 GMT

Yes, I have:

@Option

@Documentation("Incoming metadata.")

@Structure(type = Structure.Type.IN)

private List<Column> incomingSchema;

@Option

@Documentation("Table.")

List<Column> columnList=new ArrayList<>();

public static class Column implements Serializable {

@Option

@Documentation("Column name")

String label;

}

Now I want put column names from inputSchema to columnList. As result I want something like this:

Re: Select column names from input schema to java variable.

undx — Wed, 16 Feb 2022 08:39:50 GMT

The issue is that columns designed by schema editor will only be available at runtime, not at design!