This release contains all of the changes from 1.7.0-RC and is compatible with Kotlin 2.0.
Please note that for reasons explained in the 1.7.0-RC changelog, it may not be possible to use it with the Kotlin 1.9.x
compiler plugin. Yet, it is still fully backward compatible with previous versions.
The only difference with 1.7.0-RC is that the classDiscriminatorMode property in JsonBuilder is marked as experimental,
as it should have been when it was introduced (#2680).
1.7.0-RC
This is a release candidate for the next version. It is based on Kotlin 2.0.0-RC3 and is fully compatible with a stable Kotlin 2.0 release.
Due to a potential breaking change (see below), it requires a compiler plugin with a version at least of 2.0.0-RC1.
Important change: priority of PolymorphicSerializer for interfaces during call to serializer() function
Non-sealed interfaces in kotlinx.serialization are always serializable with a polymorphic serializer,
even if they do not have @Serializable annotation. This also means that serializersModule.serializer<SomeInterface>() call will return you a serializer capable of polymorphism. This function was written in a way that it unconditionally returns a PolymorphicSerializer if type argument is a non-sealed interface. This caused problems with SerializersModule functionality, because actual module was not taken into consideration, and therefore it was impossible to override serializer for interface using 'contextual serialization' feature. The problem is described in detail here. To overcome these problems, we had to change the behavior of this function regarding interfaces. It now looks into SerializersModule first if T is a non-sealed interface, and only if there is no registered contextual serializer for T, it returns a polymorphic serializer.
Behavior before 1.7.0-RC:
interface SomeInterface
val module = SerializersModule {
contextual(SomeInterface::class, CustomSomeInterfaceSerializer)
}
// Prints PolymorphicSerializer<SomeInterface>:
println(module.serializer<SomeInterface>())
Behavior in 1.7.0-RC, 1.7.0, and higher:
interface SomeInterface
val module = SerializersModule {
contextual(SomeInterface::class, CustomSomeInterfaceSerializer)
}
// Prints CustomSomeInterfaceSerializer:
println(module.serializer<SomeInterface>())
We expect minimal impact from this change, but be aware of it anyway.
Implementation details are available in this PR.
Due to the serializer() function being also a compiler intrinsic, code
of kotlinx.serialization compiler plugin also accommodates this change in the 2.0 branch. To get a consistent result from both plugin and runtime, kotlinx.serialization compiler plugin should be at least of 2.0.0-RC1 version.To verify so, 1.7.0-RC runtime will be rejected by older plugins.
This release contains all of the changes from 1.7.0-RC and is compatible with Kotlin 2.0.
Please note that for reasons explained in the 1.7.0-RC changelog, it may not be possible to use it with the Kotlin 1.9.x
compiler plugin. Yet, it is still fully backwards compatible with previous versions.
The only difference with 1.7.0-RC is that classDiscriminatorMode property in JsonBuilder is marked as experimental,
as it should have been when it was introduced (#2680).
1.7.0-RC / 2024-05-16
This is a release candidate for the next version. It is based on Kotlin 2.0.0-RC3 and is fully compatible with a stable Kotlin 2.0 release.
Due to a potential breaking change (see below), it requires a compiler plugin with a version at least of 2.0.0-RC1.
Important change: priority of PolymorphicSerializer for interfaces during call to serializer() function
Non-sealed interfaces in kotlinx.serialization are always serializable with a polymorphic serializer,
even if they do not have @Serializable annotation. This also means that serializersModule.serializer<SomeInterface>() call will return you a serializer capable of polymorphism.
This function was written in a way that it unconditionally returns a PolymorphicSerializer if type argument is a non-sealed interface.
This caused problems with SerializersModule functionality, because actual module was not taken into consideration, and therefore it was impossible
to override serializer for interface using 'contextual serialization' feature. The problem is described in details here.
To overcome these problems, we had to change the behavior of this function regarding interfaces. It now looks into SerializersModule first if T is a non-sealed interface,
and only if there is no registered contextual serializer for T, it returns a polymorphic serializer.
Behavior before 1.7.0-RC:
interface SomeInterface
val module = SerializersModule {
contextual(SomeInterface::class, CustomSomeInterfaceSerializer)
}
// Prints PolymorphicSerializer<SomeInterface>:
println(module.serializer<SomeInterface>())
Behavior in 1.7.0-RC, 1.7.0, and higher:
interface SomeInterface
val module = SerializersModule {
contextual(SomeInterface::class, CustomSomeInterfaceSerializer)
}
// Prints CustomSomeInterfaceSerializer:
println(module.serializer<SomeInterface>())
</tr></table>
... (truncated)
Commits
d2dc7d2 Update to Kotlin 2.0 and prepare 1.7.0 release (#2706)
1cac162 Merge remote-tracking branch 'origin/master' into dev
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Bumps org.jetbrains.kotlinx:kotlinx-serialization-json from 1.6.3 to 1.7.0.
Release notes
Sourced from org.jetbrains.kotlinx:kotlinx-serialization-json's releases.
... (truncated)
Changelog
Sourced from org.jetbrains.kotlinx:kotlinx-serialization-json's changelog.
... (truncated)
Commits
d2dc7d2
Update to Kotlin 2.0 and prepare 1.7.0 release (#2706)1cac162
Merge remote-tracking branch 'origin/master' into devfbd0734
Use@​PublishedApi
annotation on functions called from plugin-generated code (...4bf4113
Add bencoding to community-supported formats (#2687)c487e78
JSON: Fix mutableclassDiscriminatorMode
in config, and mark experimental i...385c97d
Remove yellow code (#2691)688f64b
Added link to kotlinx-serialization-smile in the formats list (#2689)1f38e22
Add additional repositorydd1b76e
Prepare Changelog and Readme for 1.7.0-RC releaseb4bf182
Raise Require-Kotlin-Version to 2.0.0-RC1Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting
@dependabot rebase
.Dependabot commands and options
You can trigger Dependabot actions by commenting on this PR: - `@dependabot rebase` will rebase this PR - `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it - `@dependabot merge` will merge this PR after your CI passes on it - `@dependabot squash and merge` will squash and merge this PR after your CI passes on it - `@dependabot cancel merge` will cancel a previously requested merge and block automerging - `@dependabot reopen` will reopen this PR if it is closed - `@dependabot close` will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually - `@dependabot show