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kotlinx-metadata-jvm

2.0.0 and higher

Starting with Kotlin 2.0, kotlin-metadata-jvm library is promoted to stable, and is a part of Kotlin distribution now. It means that it has the same versioning as Kotlin compiler and Kotlin standard library, and the same release cycle. To achieve this, coordinates of the library were changed: it is now in org.jetbrains.kotlin group with kotlin-metadata-jvm id (notice the drop of X from the coordinates). This also means that the root package was changed from kotlinx.metadata to kotlin.metadata.

Among other noticeable changes, all previously deprecated declarations were removed from the library. In case you need to perform a migration with aid, migrate your project to 0.9.0 version first using migration guide.

This is the last entry of this changelog. General changelog for Kotlin's Libraries subsystem is available in the ChangeLog.md at the repository root.

0.9.0

The main purpose of this release is to promote all previous deprecations to ERROR level if they were not already. Please refer to the migration guide if you are using deprecated functions. Also, this release includes several bugfixes. It still uses Kotlin 1.9, but is able to read or write metadata of version 2.0.

  • Add missing documentation to KmVersionRequirement.toString
  • Raise all deprecations in kotlinx-metadata-jvm to ERROR (KT-63157)
  • Do not allow writing metadata versions that are too high (KT-64230)
  • Add KmVersionRequirementKind.UNKNOWN (KT-60870)

0.8.0

This release concludes our API overhaul: it features last significant API changes, as well as raised deprecations to ERROR level almost everywhere. To help with migration, we've prepared a special guide. It still uses Kotlin 1.9, but is able to read or write metadata of version 2.0.

  • Provide a separate class for representing metadata version in kotlinx-metadata: JvmMetadataVersion
  • Unify write() method and make it a member of KotlinClassMetadata (also KotlinModuleMetadata)
  • Split KotlinClassMetadata.read into readStrict and readLenient
  • Promote most deprecations in kotlinx-metadata-jvm to ERROR, including Flags API and Visitors API.
  • Deprecate KmProperty.hasGetter(hasSetter) in favor of KmProperty.getter(setter)
  • Add missing delegation in KmDeclarationContainerVisitor.visitExtensions for consistency

0.7.0

This release features several significant API changes. To help with migration, we've prepared a special guide.

  • Update to Kotlin 1.9 with metadata version 1.9, support reading/writing metadata of version 2.0 which will be used in Kotlin 2.0
  • Rework flags API (see migration from Flags API to Attributes API).
  • Restructure KotlinClass(Module)Metadata.write/read (see changes in reading and writing API).
  • Add @JvmStatic + @JvmOverloads to writing functions in KotlinClassMetadata
  • Deprecate KmModule.annotations for removal because it is always empty and should not be used.
  • Move KmModuleFragment to an kotlinx.metadata.internal.common package. This class is intended for internal use only. If you have use-cases for it, please report an issue to YouTrack.
  • Improve toString() for KmAnnotationArgument
  • Add missing deprecation for KmExtensionType and experimentality for KmConstantValue.
  • Enhance kotlinx-metadata-jvm KDoc and set up Dokka.

0.6.2

This release uses Kotlin 1.8.20 with metadata version 1.8, and as a special case, is able to read metadata of version 2.0. This is done as an incentive to test K2 compiler and 2.0 language version. No other changes were made and no migration is needed. Note: 0.6.1 was released with an incorrect fix for this problem. Do not use 0.6.1.

0.6.0

This release features several significant API changes. To help with migration, we've prepared a special guide.

  • Update to Kotlin 1.8 with metadata version 1.8, support reading/writing metadata of version 1.9 which will be used in Kotlin 1.9
  • Deprecate Visitors API
  • Replace usages of KotlinClassHeader with direct usage of kotlin.Metadata annotation. Former reserved exclusively for use from Java clients.
  • impl package renamed to internal
  • Writers are deprecated. Special function family KotlinClassMetadata.write is introduced instead.

0.5.0

  • Update to Kotlin 1.7 with metadata version 1.7, support reading/writing metadata of version 1.8 which will be used in Kotlin 1.8.
  • kotlinx-metadata-jvm can no longer be used on JVM 1.6, and now requires JVM 1.8 or later.
  • Add Flag.Type.IS_DEFINITELY_NON_NULL.
  • Add KmClass.contextReceiverTypes, KmFunction.contextReceiverTypes, KmProperty.contextReceiverTypes
    • The API is experimental and requires @ExperimentalContextReceivers on the usages.

0.4.2

  • Add experimental internal API to read metadata of .kotlin_builtins/.kotlin_metadata files.

0.4.1

  • Add KmProperty.syntheticMethodForDelegate for optimized delegated properties (KT-39055).

0.4.0

  • Update to Kotlin 1.6 with metadata version 1.6, support reading/writing metadata of version 1.7 which will be used in Kotlin 1.7.
  • Add JvmPropertyExtensionVisitor.visitSyntheticMethodForDelegate for optimized delegated properties (KT-39055).
  • Add JVM-specific class flags:
    • JvmClassExtensionVisitor.visitJvmFlags
    • JvmFlag.Class.HAS_METHOD_BODIES_IN_INTERFACE
    • JvmFlag.Class.IS_COMPILED_IN_COMPATIBILITY_MODE
  • KT-48965 Make the type of KmValueParameter.type non-null KmType
  • Remove unused JvmTypeAliasExtensionVisitor and JvmValueParameterExtensionVisitor
  • Fix type flags (suspend, definitely non-null) on underlying type of inline class available via KmClass.inlineClassUnderlyingType

0.3.0

  • Update to Kotlin 1.5 with metadata version 1.5. Note: metadata of version 1.5 is readable by Kotlin compiler/reflection of versions 1.4 and later.
  • Breaking change: improve API of annotation arguments. KmAnnotationArgument doesn't have val value: T anymore, it was moved to a subclass named KmAnnotationArgument.LiteralValue<T>. The property value is:
    • renamed to annotation in AnnotationValue
    • renamed to elements in ArrayValue
    • removed in favor of enumClassName/enumEntryName in EnumValue
    • removed in favor of className/arrayDimensionCount in KClassValue
    • changed type from signed to unsigned integer types in UByteValue, UShortValue, UIntValue, ULongValue
  • KT-44783 Add Flag.IS_VALUE for value classes
    • Breaking change: Flag.IS_INLINE is deprecated, use Flag.IS_VALUE instead
  • Breaking change: deprecate KotlinClassHeader.bytecodeVersion and KotlinClassHeader's constructor that takes a bytecode version array. Related to 'KT-41758`.
  • KT-45594 KClass annotation argument containing array of classes is not read/written correctly
  • KT-45635 Add underlying property name & type for inline classes

0.2.0

  • 'KT-41011` Using KotlinClassMetadata.Class.Writer with metadata version < 1.4 will write incorrect version requirement table
    • Breaking change: KotlinClassMetadata.*.Writer.write throws exception on metadataVersion earlier than 1.4.0. Note: metadata of version 1.4 is readable by Kotlin compiler/reflection of versions 1.3 and later.
  • Breaking change: KotlinClassMetadata.*.Writer.write no longer accept bytecodeVersion.
  • KT-42429 Wrong interpretation of Flag.Constructor.IS_PRIMARY
    • Breaking change: Flag.Constructor.IS_PRIMARY is deprecated, use Flag.Constructor.IS_SECONDARY instead
  • KT-37421 Add Flag.Class.IS_FUN for functional interfaces
  • Add KmModule.optionalAnnotationClasses for the new scheme of compilation of OptionalExpectation annotations in multiplatform projects (KT-38652)

0.1.0

0.0.6

  • KT-31308 Add module name extensions to kotlinx-metadata-jvm
  • KT-31338 Retain "is moved from interface companion" property flag in kotlinx-metadata-jvm
    • Breaking change: JvmPropertyExtensionVisitor.visit has a new parameter jvmFlags: Flags
  • Correctly write "null" constant value in effect expression of a contract
  • Rename desc parameters to signature in JvmFunctionExtensionVisitor, JvmPropertyExtensionVisitor, JvmConstructorExtensionVisitor
  • Do not expose KmExtensionType internals
  • Add KmExtensionVisitor.type to get dynamic type of an extension visitor

0.0.5

  • KT-25371 Support unsigned integers in kotlinx-metadata-jvm
  • KT-28682 Wrong character replacement in ClassName.jvmInternalName of kotlinx-metadata-jvm

0.0.4

  • KT-25920 Compile kotlinx-metadata-jvm with JVM target bytecode version 1.6 instead of 1.8
  • KT-25223 Add JvmFunctionExtensionVisitor.visitEnd
  • KT-26188 Do not pass field signature for accessor-only properties

0.0.3

  • Support metadata of local delegated properties (see JvmDeclarationContainerExtensionVisitor.visitLocalDelegatedProperty)
  • KT-24881 Use correct class loader in kotlinx-metadata to load MetadataExtensions implementations
  • KT-24945 Relocate package org.jetbrains.kotlin to fix IllegalAccessError in annotation processing

0.0.2

  • Change group ID from org.jetbrains.kotlin to org.jetbrains.kotlinx
  • Depend on a specific version of kotlin-stdlib from Maven Central instead of snapshot from Sonatype Nexus
  • Use JvmMethodSignature and JvmFieldSignature to represent JVM signatures instead of plain strings

0.0.1

  • Initial release