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jackson-module-kotlin discussion
jackson-module-kotlin reviews and mentions
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[Tiny] Kotlin, Spring Boot, and the Journey of Duration Serialisation
Support for inline classes
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Jackson, moshi or kotlinx.serialization?
strictNullCheck option in the Kotlin module doesn't cover non-object-field situations at all. https://github.com/FasterXML/jackson-module-kotlin/issues/479
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Strings, Please! Eliminating Data Leaks Caused by Kotlin Assertions
But, it sucked. I was constantly finding bugs related to nullability, around generics, inline/value classes, etc. And it wasn't the typical trivial ones, either. Figuring out that you're calling a Java library and encountering a "platform type" is the least problematic. My biggest struggle came from using libraries that were written in Java first, but then added a Kotlin API on top. So, my code didn't know I was dealing with a platform type and neither did I. Yet they were still broken. Some of them are broken in an unfixable way, such as JacksonXML's Kotlin module: https://github.com/FasterXML/jackson-module-kotlin/issues/479. So many Java libraries rely on reflection even when it's not obvious that they might, so you pretty much can't ever use value classes in Kotlin, including the unsigned number types.
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From Java to Kotlin. There and back again
You should add Jackson Module Kotlin in your project. After that, you can't specify a type of object explicitly.
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How Cloudflare security responded to log4j2 vulnerability
Not really, you just need to handle some standard types and have a good extension mechanism to let the user implement factories. That library having built in support for UUID and datetime is probably a bit much, I'd prefer a plugin like https://github.com/FasterXML/jackson-module-kotlin
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Ktor vs Spring for creating an API
There is a bug at this very moment that makes it literally impossible to deserialize [1, 2, 3, null] into a List with Jackson's Kotlin module. Yes- even if you set KotlinModule(strictNullChecks = true). It's just broken. (Here's the link: https://github.com/FasterXML/jackson-module-kotlin/issues/479)
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Kotlin Team AMA #3: Ask Us Anything
Got you, thanks. I didn’t mean to sound offensive - a better wording would be that they don’t seem to prioritize this part, at least based on https://github.com/FasterXML/jackson-module-kotlin/issues/199, which has one abandoned branch from a 3rd party and a couple of comments from from maintainers.
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kotlinx.serialization 1.2 Released: High-Speed JSON Handling, Value Class Support, Overhauled Docs, and more
If you use Jackson, don't forget to include the Kotlin extensions https://github.com/FasterXML/jackson-module-kotlin
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Serializing and deserializing "Any" Kotlin type using jackson mapper
Did you include jackson-module-kotlin?
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A note from our sponsor - InfluxDB
www.influxdata.com | 20 Jul 2025
Stats
FasterXML/jackson-module-kotlin is an open source project licensed under Apache License 2.0 which is an OSI approved license.
The primary programming language of jackson-module-kotlin is Kotlin.
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