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53 changes: 53 additions & 0 deletions CHANGELOG.md
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1.7.2 / 2024-08-28
==================

This release provides several new features, including a major Cbor configuration rework.
It uses Kotlin 2.0.20 by default.

## Cbor feature set for COSE compliance

This change brings a lot of features to the CBOR format, namely:

- Serial Labels — see `@CborLabel` annotation and `preferCborLabelsOverNames` flag.
- Tagging of keys and values — see `encode*Tags` and `verify*Tags` set of flags
- Definite length encoding — see `useDefiniteLengthEncoding`. This flag affects object encoding, since decoding of arrays with definite lenghts is automatically supported.
- Option to globally prefer major type 2 for byte array encoding — see `alwaysUseByteString` flag.

Since there are quite a lot of flags now, they were restructured to a separate `CborConfiguration` class, similarly to `JsonConfiguration`.
It is possible to retrieve this configuration from `CborEncoder/CborDecoder` interfaces in your custom serializers (see their documentation for details).

All of these features make it possible to serialize and parse [COSE-compliant CBOR](https://datatracker.ietf.org/doc/html/rfc8152), for example, ISO/IEC 18013-5:2021-compliant mobile driving license data.
In case you want to make use of them, there is a predefined `Cbor.CoseCompliant` instance.
However, some canonicalization steps (such as sorting keys) still need to be performed manually.

This functionality [was contributed](https://github.com/Kotlin/kotlinx.serialization/pull/2412) to us by [Bernd Prünster](https://github.com/JesusMcCloud).

## Keeping generated serializers

One of the most requested features for serialization plugin was to continue to generate a serializer even if a custom one is specified for the class.
It allows using a plugin-generated serializer in a fallback or delegate strategy, accessing type structure via descriptor, using default serialization behavior in inheritors that do not use custom serializers.

Starting with this release, you can specify the `@KeepGeneratedSerializer` annotation on the class declaration to instruct the plugin to continue generating the serializer.
In this case, the serializer will be accessible using the `.generatedSerializer()` function on the class's companion object.

> This annotation is currently experimental. Kotlin 2.0.20 or higher is required for this feature to work.

You can check out the examples in [the documentation](docs/serializers.md#simultaneous-use-of-plugin-generated-and-custom-serializers) and in the PRs: [#2758](https://github.com/Kotlin/kotlinx.serialization/pull/2758), [#2669](https://github.com/Kotlin/kotlinx.serialization/pull/2669).

## Serializer for kotlin.uuid.Uuid

Kotlin 2.0.20 [added](https://kotlinlang.org/docs/whatsnew2020.html#support-for-uuids-in-the-common-kotlin-standard-library) a common class to represent UUIDs in a multiplatform code.
kotlinx.serialization 1.7.2 provides a corresponding `Uuid.serializer()` for it, making it possible to use it in `@Serializable` classes.
Note that for now, serializer should be provided manually with [`@Contextual` annotation](https://github.com/Kotlin/kotlinx.serialization/blob/master/docs/serializers.md#contextual-serialization).
Plugin will be able to automatically insert `Uuid` serializer in Kotlin 2.1.0.

See more details in the [corresponding PR](https://github.com/Kotlin/kotlinx.serialization/pull/2744).

## Other bugfixes and improvements

* Prohibited using of zero and negative field numbers in ProtoNumber (#2766)
* Improve readability of protobuf decoding exception messages (#2768) (thanks to [xiaozhikang0916](https://github.com/xiaozhikang0916))
* docs(serializers): Fix grammatical errors (#2779) (thanks to [jamhour1g](https://github.com/jamhour1g))
* Fixed VerifyError after ProGuard optimization (#2728)
* Add wasm-wasi target to Okio integration (#2727)

1.7.1 / 2024-06-25
==================

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24 changes: 12 additions & 12 deletions README.md
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[![JetBrains official project](https://jb.gg/badges/official.svg)](https://confluence.jetbrains.com/display/ALL/JetBrains+on+GitHub)
[![GitHub license](https://img.shields.io/badge/license-Apache%20License%202.0-blue.svg?style=flat)](http://www.apache.org/licenses/LICENSE-2.0)
[![TeamCity build](https://img.shields.io/teamcity/http/teamcity.jetbrains.com/s/KotlinTools_KotlinxSerialization_Ko.svg)](https://teamcity.jetbrains.com/viewType.html?buildTypeId=KotlinTools_KotlinxSerialization_Ko&guest=1)
[![Kotlin](https://img.shields.io/badge/kotlin-2.0.0-blue.svg?logo=kotlin)](http://kotlinlang.org)
[![Maven Central](https://img.shields.io/maven-central/v/org.jetbrains.kotlinx/kotlinx-serialization-core/1.7.1)](https://central.sonatype.com/artifact/org.jetbrains.kotlinx/kotlinx-serialization-core/1.7.1)
[![Kotlin](https://img.shields.io/badge/kotlin-2.0.20-blue.svg?logo=kotlin)](http://kotlinlang.org)
[![Maven Central](https://img.shields.io/maven-central/v/org.jetbrains.kotlinx/kotlinx-serialization-core/1.7.2)](https://central.sonatype.com/artifact/org.jetbrains.kotlinx/kotlinx-serialization-core/1.7.2)
[![KDoc link](https://img.shields.io/badge/API_reference-KDoc-blue)](https://kotlinlang.org/api/kotlinx.serialization/)
[![Slack channel](https://img.shields.io/badge/chat-slack-blue.svg?logo=slack)](https://kotlinlang.slack.com/messages/serialization/)

Expand Down Expand Up @@ -95,17 +95,17 @@ Kotlin DSL:

```kotlin
plugins {
kotlin("jvm") version "2.0.0" // or kotlin("multiplatform") or any other kotlin plugin
kotlin("plugin.serialization") version "2.0.0"
kotlin("jvm") version "2.0.20" // or kotlin("multiplatform") or any other kotlin plugin
kotlin("plugin.serialization") version "2.0.20"
}
```

Groovy DSL:

```gradle
plugins {
id 'org.jetbrains.kotlin.multiplatform' version '2.0.0'
id 'org.jetbrains.kotlin.plugin.serialization' version '2.0.0'
id 'org.jetbrains.kotlin.multiplatform' version '2.0.20'
id 'org.jetbrains.kotlin.plugin.serialization' version '2.0.20'
}
```

Expand All @@ -123,7 +123,7 @@ buildscript {
repositories { mavenCentral() }

dependencies {
val kotlinVersion = "2.0.0"
val kotlinVersion = "2.0.20"
classpath(kotlin("gradle-plugin", version = kotlinVersion))
classpath(kotlin("serialization", version = kotlinVersion))
}
Expand All @@ -134,7 +134,7 @@ Groovy DSL:

```gradle
buildscript {
ext.kotlin_version = '2.0.0'
ext.kotlin_version = '2.0.20'
repositories { mavenCentral() }

dependencies {
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}

dependencies {
implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.7.1")
implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.7.2")
}
```

Expand All @@ -176,7 +176,7 @@ repositories {
}

dependencies {
implementation "org.jetbrains.kotlinx:kotlinx-serialization-json:1.7.1"
implementation "org.jetbrains.kotlinx:kotlinx-serialization-json:1.7.2"
}
```

Expand Down Expand Up @@ -266,8 +266,8 @@ Ensure the proper version of Kotlin and serialization version:

```xml
<properties>
<kotlin.version>2.0.0</kotlin.version>
<serialization.version>1.7.1</serialization.version>
<kotlin.version>2.0.20</kotlin.version>
<serialization.version>1.7.2</serialization.version>
</properties>
```

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2 changes: 1 addition & 1 deletion gradle.properties
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#

group=org.jetbrains.kotlinx
version=1.7.2-SNAPSHOT
version=1.7.3-SNAPSHOT
jdk_toolchain_version=11
# This version takes precedence if 'bootstrap' property passed to project
kotlin.version.snapshot=2.0.255-SNAPSHOT
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2 changes: 1 addition & 1 deletion integration-test/gradle.properties
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#

mainKotlinVersion=2.0.20
mainLibVersion=1.7.2-SNAPSHOT
mainLibVersion=1.7.3-SNAPSHOT

kotlin.code.style=official
kotlin.js.compiler=ir
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