On Fri, Mar 5, 2021 at 10:22 AM Marcelo Carabolante <[email protected]> wrote: > > Hello folks, > > Is there any way to configure Jackson to treat null/missing list a empty > collection? > > context: we are using immutable objects, so its constructor based > deserialization. > > I tried a few stuff, but I always seems to hit a wall.
If what you want is to allow handling missing/null Collection value(s) by one of: 1. Replace with default "empty" value 2. Throw exception 3. Skip assignment (for setter/field), to leave at default (presumable empty) value then what you want is the special form of `@JsonSetter` annotation (or matching "config override" configuration). It was added in 2.9, and explained on: https://cowtowncoder.medium.com/jackson-2-9-features-b2a19029e9ff So you'd add: @JsonSetter(nulls=Nulls.AS_EMPTY) on the specific accessor (field, setter, constructor parameter). To handle the case of missing values (as opposed to just explicitly received `null`s), you will need to apply it to constructor parameter. Hope this helps, -+ Tatu +- > > Thanks! > > > ________________________________ > This email and any files transmitted with it contain confidential information > and/or privileged or personal advice. This email is intended for the > addressee(s) stated above only. If you are not the addressee of the email > please do not copy or forward it or otherwise use it or any part of it in any > form whatsoever. If you have received this email in error please notify the > sender and remove the e-mail from your system. Thank you. > > This is an email from the company Just Eat Takeaway.com N.V., a public > limited liability company with corporate seat in Amsterdam, the Netherlands, > and address at Oosterdoksstraat 80, 1011 DK Amsterdam, registered with the > Dutch Chamber of Commerce with number 08142836 and where the context > requires, includes its subsidiaries and associated undertakings. > > -- > You received this message because you are subscribed to the Google Groups > "jackson-user" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/jackson-user/f94adfef-e4be-4210-9b2e-62c87a3dd1c5n%40googlegroups.com. -- You received this message because you are subscribed to the Google Groups "jackson-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/jackson-user/CAL4a10gu-Dig-hspBX-WGWWBgNEZqesvvF1PgLpbRvJd49jz5w%40mail.gmail.com.
