Re: Apply string trim to all fields including structs and arrays

[Matthew Ouyang <ma...@gmail.com>]

By chance, I found a package-private class RowUtils.RowCases.  I'm going to
give this a try.

https://github.com/apache/beam/blob/7418c84de2b68b06e0318766ca6c69f4d2144390/sdks/java/core/src/main/java/org/apache/beam/sdk/values/RowUtils.java#L80

On Fri, Oct 15, 2021 at 5:09 PM Andrew Pilloud <ap...@google.com> wrote:

> I don't think FieldAccessDescriptor will help you here. You don't want to
> access fields, you want to apply a method to them. I took a quick look and
> didn't find anything. If we had something like this it would probably live
> in one of these two folders, you might be able to find some examples to
> start from:
>
> https://github.com/apache/beam/tree/master/sdks/java/core/src/main/java/org/apache/beam/sdk/schemas/transforms
>
> https://github.com/apache/beam/tree/master/sdks/java/core/src/main/java/org/apache/beam/sdk/schemas/utils
>
>
>
>
> On Fri, Oct 15, 2021 at 1:28 PM Matthew Ouyang <ma...@gmail.com>
> wrote:
>
>> I have a Row that has a struct that has string fields and an array of
>> structs which also has string fields.  Is there any simple way to apply a
>> whitespace trim to all string fields (like a ** wildcard)?  I know
>> FieldAccessDescriptor.withAllFields exists but will that work for anything
>> beyond the top level?  I'm hoping that I don't have to traverse the Row in
>> code.
>>
>