Annotation Processing in a Kotlin World Zac Sweers @pandanomic - PowerPoint PPT Presentation

annotation class Metadata( val k: Int = 1, val mv: IntArray = [] )a

annotation class Metadata( val k: Int = 1, val mv: IntArray = [], val bv: IntArray = [] )a

annotation class Metadata( val k: Int = 1, val mv: IntArray = [], val bv: IntArray = [], val d1: Array<String> = [] )a

annotation class Metadata( val k: Int = 1, val mv: IntArray = [], val bv: IntArray = [], val d1: Array<String> = [], val d2: Array<String> = [] )a

internal annotation class Metadata( val k: Int = 1, val mv: IntArray = [], val bv: IntArray = [], val d1: Array<String> = [], val d2: Array<String> = [] )a

@kotlin.Metadata( mv = {1, 1, 11}, bv = {1, 0, 2}, k = 1, d1 = {"\u0000\u0012\n\u0002\u0018\u0002\n\u0002\u0010\u0000\n\u0000\n\u0002\u0010\u000e\n\u0002\b\u0004\b\u0007\u0018 \u00002\u00020\u0001B\r\u0012\u0006\u0010\u0002\u001a\u00020\u0003\u00a2\u0006\u0002\u0010\u0004R\u0011\u0010\u0 002\u001a\u00020\u0003\u00a2\u0006\b\n\u0000\u001a\u0004\b\u0005\u0010\u0006\u00a8\u0006\u0007"}, d2 = {"Ltest/Person;", "", "name", "", "(Ljava/lang/String;)V", "getName", "()Ljava/lang/String;", "test- project"} )a public final class Person { @org.jetbrains.annotations.NotNull() private final java.lang.String name = null; @org.jetbrains.annotations.NotNull() public final java.lang.String getName() { return null; } public Person(@org.jetbrains.annotations.NotNull() java.lang.String name) { super(); } }

@kotlin.Metadata( mv = {1, 1, 11}, bv = {1, 0, 2}, k = 1, d1 = {"\u0000\u0012\n\u0002\u0018\u0002\n\u0002\u0010\u0000\n \u0000\n\u0002\u0010\u000e\n\u0002\b\u0004\b\u0007\u0018 \u00002\u00020\u0001B\r\u0012\u0006\u0010\u0002\u001a\u0 0020\u0003\u00a2\u0006\u0002\u0010\u0004R\u0011\u0010\u0 002\u001a\u00020\u0003\u00a2\u0006\b\n\u0000\u001a\u0004 \b\u0005\u0010\u0006\u00a8\u0006\u0007"}, d2 = {"Ltest/Person;", "", "name", "", "(Ljava/lang/ String;)V", "getName", "()Ljava/lang/String;", "test- project"} )a

@kotlin.Metadata( mv = {1, 1, 11}, bv = {1, 0, 2}, k = 1, d1 = {"\u0000\u0012\n\u0002\u0018\u0002\n\u0002\u0010\u0000\n \u0000\n\u0002\u0010\u000e\n\u0002\b\u0004\b\u0007\u0018 \u00002\u00020\u0001B\r\u0012\u0006\u0010\u0002\u001a\u0 0020\u0003\u00a2\u0006\u0002\u0010\u0004R\u0011\u0010\u0 002\u001a\u00020\u0003\u00a2\u0006\b\n\u0000\u001a\u0004 \b\u0005\u0010\u0006\u00a8\u0006\u0007"}, d2 = {"Ltest/Person;", "", "name", "", "(Ljava/lang/ String;)V", "getName", "()Ljava/lang/String;", "test- 🤕 project"} )a

val metadata = typeElement.getAnnotation(Metadata::class.java)

"Reading information from an annotation, you say?"

Compiler Plugins

Compiler Plugins • Faster/incremental

Compiler Plugins • Faster/incremental • No stubs generation

Compiler Plugins • Faster/incremental • No stubs generation • No kapt

BUT! • Undocumented and not stable

BUT! • Undocumented and not stable • Only applies to Kotlin sources

BUT! • Undocumented and not stable • Only applies to Kotlin sources • Tooling can be painful

BUT! • Undocumented and not stable • Only applies to Kotlin sources • Tooling can be painful • github.com/hzsweers/redacted-compiler- plugin

BUT! • Undocumented and not stable • Only applies to Kotlin sources • Tooling can be painful • github.com/hzsweers/redacted-compiler- plugin • The talk title was Annotation Processing in a Kotlin

BUT!* • Undocumented and not stable • Only applies to Kotlin sources • Tooling can be painful • github.com/hzsweers/redacted-compiler- plugin • The talk title was Annotation Processing in a Kotlin

"Reading information from an annotation, you say?"

kotlin-metadata https://github.com/takhion/kotlin-metadata

val metadata = typeElement.getAnnotation(Metadata::class.java)

val metadata = typeElement.getAnnotation(Metadata::class.java) val Element.kotlinMetadata: KotlinMetadata?

val metadata = typeElement.kotlinMetadata val Element.kotlinMetadata: KotlinMetadata?

when (typeElement.kotlinMetadata) { is KotlinPackageMetadata -> is KotlinClassMetadata -> is KotlinFileMetadata -> is KotlinMultiFileClassPartMetadata -> is KotlinMultiFileClassFacadeMetadata -> is KotlinSyntheticClassMetadata -> is KotlinUnknownMetadata -> }a

when (typeElement.kotlinMetadata) { is KotlinClassMetadata -> }a

when (metadata) { is KotlinClassMetadata -> { val classData: ClassData = metadata.data }a }b

when (metadata) { is KotlinClassMetadata -> { val classData: ClassData = metadata.data val proto: ProtoBuf.Class = classData.classProto }a }b

when (metadata) { is KotlinClassMetadata -> { val classData: ClassData = metadata.data val proto: ProtoBuf.Class = classData.classProto val nameResolver = classData.nameResolver }a }b

@kotlin.Metadata( mv = {1, 1, 11}, bv = {1, 0, 2}, k = 1, d1 = {"\u0000\u0012\n\u0002\u0018\u0002\n\u0002\u0010\u0000\n \u0000\n\u0002\u0010\u000e\n\u0002\b\u0004\b\u0007\u0018 \u00002\u00020\u0001B\r\u0012\u0006\u0010\u0002\u001a\u0 0020\u0003\u00a2\u0006\u0002\u0010\u0004R\u0011\u0010\u0 002\u001a\u00020\u0003\u00a2\u0006\b\n\u0000\u001a\u0004 \b\u0005\u0010\u0006\u00a8\u0006\u0007"}, d2 = {"Ltest/Person;", "", "name", "", "(Ljava/lang/ String;)V", "getName", "()Ljava/lang/String;", "test- project"} )a

Annotation Processing in a Kotlin World Zac Sweers @pandanomic - PowerPoint PPT Presentation

Annotation Processing in a Kotlin World Zac Sweers @pandanomic Annotation Processing in a Kotlin World https://goo.gl/rSHTn4 Annotation Processing in a Kotlin World Annotation Processing in a Kotlin World Annotation Processing in a

How to Build a React App in Kotlin Dave Ford Questions for audience Kotlin? React?

Writing Your First Kotlin Compiler Plugin Kevin Most A brief intro Are these basically

Kotlin 1.4 Language Features Svetlana Isakova October 12, 2020 @sveta_isakova Kotlin 1.4

Pre-processing and annotation Raw data from a linguistic source cant be exploited directly. We

Pre-processing and annotation Raw data from a linguistic source cant be exploited directly. We

Kotlin/JS in 1.4 and beyond Sebastian Aigner October 14, 2020 @sebi_io An overview of

Kotlin: The Next Frontier for Modern (Meta) Programming Kotlin, TornadoFX and Metaprogramming

Live Coding Kotlin/Native Snake github.com/dkandalov/kotlin-native-snake @dmitrykandalov

Treebanking in the World of Thucydides Linguistic annotation for the Hellespont Project Francesco

KOTLIN/NATIVE + CLANG, TRAVEL NOTES NIKOLAY IGOTTI, JETBRAINS KOTLIN IS NOT JUST AN ISLAND

Kotlin Puzzlers, vol 2 KotlinConf 2018, Amsterdam #kotlinpuzzlers @antonkeks Tallinn, Estonia

Kotlin In Practice @philipp_hauer Spreadshirt JAX, 25.04.18 Spreadshirt 2 Hands Up! Kotlin

ANKO THE ULTIMATE NINJA OF KOTLIN LIBRARIES? AGENDA What are Kotlin and Anko?

Automate your workflows with Kotlin Fosdem - 2020 1 Automate your workflows with Kotlin

A Look Into the Future Roman Elizarov October 12, 2020 @relizarov A bit of history Kotlin 1.0

Annotation methods to develop and evaluate an expert system based on natural language processing

WELCOME TO MENS LIFE 2019-2020 Carl Hofmann Teaching Leader Lambs Lunch: Thanks to those

Enabling Technologies: Innovation in HR Service Delivery Hosted by: EY and Golden Key Group

Bill Beaumonts Business Breakfast Friday November 2 nd 2018 From

The Connection Between Nutrition and School Success No Kid Hungry No Kid Hungry is a national

Fe February 2018 Me Meeting ng MEETING SUMMARY Very good attendance with several new

EECS E6870: Lecture 12: Special Topics Spoken Term Detection Stanley F. Chen, Michael A.

trs rtts

Online Shoppings Impact on Society Presented By Derek Hurley Facets of Online Shopping A