Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
kotlinx.serialization
Search
Takuji Nishibayashi
October 04, 2020
Technology
0
480
kotlinx.serialization
Takuji Nishibayashi
October 04, 2020
Tweet
Share
More Decks by Takuji Nishibayashi
See All by Takuji Nishibayashi
kotlinx.datetime 使ってみた
takuji31
0
60
HiltのCustom Componentについて
takuji31
0
72
java.timeをAndroidで使う
takuji31
0
39
KSPを使ってコード生成
takuji31
0
220
Kotlin Symbol Processing API (KSP) を使って Kotlin ア プリケーションの開発を効率化する
takuji31
1
840
kanmoba-returns-02.pdf
takuji31
0
140
AndroidXとKotlin Coroutines
takuji31
0
290
AndroidXに潜む便利なヤツら
takuji31
0
130
Kotlin Inline Class
takuji31
0
110
Other Decks in Technology
See All in Technology
たくさん本を読んだけど 1年後には綺麗サッパリ!を乗り越えて 学習の鬼になるぞ👹
yum3
0
160
エンジニアリングマネージャーはどう学んでいくのか #devsumi / How Do Engineering Managers Continue to Learn and Grow?
expajp
4
1.3k
スレットハンティングについて知っておきたいこと
hacket
0
130
初中級者用如何使用backlog -VALE TUDOEDITION-
in0u
0
140
AWSサービスメニュー開発をしていてAWSを好きだ!と感じた瞬間
toru_kubota
0
130
開発生産性をむしろ向上させる セキュリティパートナーの作り方 / Dev Productivity Con 2024
flatt_security
0
380
LINE WORKSへ簡単通知!Incoming Webhookアプリの紹介
mmclsntr
0
110
公共領域から学ぶ クラウド移行についてエンジニアが意識していること
kawakawa2222
0
140
地理情報とAPIのトレンド
nagix
0
160
データベース研修 DB基礎【MIXI 24新卒技術研修】
mixi_engineers
PRO
0
210
Luupの開発組織におけるインシデントマネジメントの変遷 ver.RoadtoSRENEXT2024
grimoh
1
270
サーバーレスAPI(API Gateway+Lambda)とNext.jsで 個人ブログを作ろう!
shuntaka
PRO
0
560
Featured
See All Featured
Six Lessons from altMBA
skipperchong
24
3.2k
Pencils Down: Stop Designing & Start Developing
hursman
118
11k
Code Review Best Practice
trishagee
58
16k
Testing 201, or: Great Expectations
jmmastey
33
6.9k
A Philosophy of Restraint
colly
200
16k
Stop Working from a Prison Cell
hatefulcrawdad
266
20k
Easily Structure & Communicate Ideas using Wireframe
afnizarnur
189
16k
StorybookのUI Testing Handbookを読んだ
zakiyama
15
4.9k
Fight the Zombie Pattern Library - RWD Summit 2016
marcelosomers
228
16k
Bootstrapping a Software Product
garrettdimon
PRO
304
110k
From Idea to $5000 a Month in 5 Months
shpigford
377
46k
The Cost Of JavaScript in 2023
addyosmani
31
4.7k
Transcript
kotlinx .serialization @takuji31 J Lang Fest Kansai Online #1
ࣗݾհ • @takuji31 • Takuji Nishibayashi • Hatena Co., Ltd.
• App Team • ίϛοΫDAYS • ΧΫϤϜ • δϟϯϓϧʔΩʔʂ
ࣗݾհ • Android • Kotlin • (Flutter / iOS /
Material Design etc.) • ! https://blog.takuji31.jp • " https://nazuna.takuji31.jp • # https://photo.takuji31.jp
ΞϓϦέʔγϣϯͰJSONYAML XMLΛಡΜͩΓॻ͍ͨΓͯ͠·͢ ͔ʁ
AGENDA • kotlinx.serializationʹ͍ͭͯ • kotlinx.serializationͷ͍ํ • ڝ߹ϥΠϒϥϦʔͱͷൺֱ
kotlinx. serializationʹ͍ͭͯ
KotlinͷγϦΞϥΠθʔγϣϯϥ ΠϒϥϦʔ
Kotlinެࣜ
ϚϧνϓϥοτϑΥʔϜରԠ
JSONҎ֎ʹෳͷϑΥʔϚοτ ʹରԠ
ϦϑϨΫγϣϯͳ͠
kaptෆཁ
Null SafetyରԠ
github.com/Kotlin/ kotlinx.serialization
kotlinx. serializationͷ͍ํ
ηοτΞοϓखॱ
plugins { kotlin("multiplatform") // or kotlin("jvm") or kotlin("android") etc. kotlin("plugin.serialization")
version "1.4.10" // Kotlin version } kotlin { sourceSets { val commonMain by getting { dependencies { implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.0.0-RC2") } } } }
or github.com/Kotlin/ kotlinx.serialization#setup
JSON
{ "id": 1, "title": "సੜͨ͠ΒKotlinͩͬͨ݅", "author": "@takuji31", "stories": [ {
"id": 1001, "number": 1, "title": "ਆ༷ͷϛεͰϓϩάϥϛϯάݴޠʹసੜͨ͠" } ] }
Ϋϥεఆٛ
@Serializable data class Comic( val id: Long, val title: String,
val author: String, val stories: List<Story>, ) @Serializable data class Story( val id: Long, val number: Int, val title: String, )
γϦΞϥΠζ
val comic = Comic( id = 1L, title = "సੜͨ͠ΒKotlinͩͬͨ",
author = "@takuji31", stories = listOf( Story( id = 1001L, number = 1, title = "ਆ༷ͷϛεͰϓϩάϥϛϯάݴޠʹసੜͨ͠", ), ), ) Json.encodeToString(Comic.serializer(), comic)
val comic = Comic( id = 1L, title = "సੜͨ͠ΒKotlinͩͬͨ",
author = "@takuji31", stories = listOf( Story( id = 1001L, number = 1, title = "ਆ༷ͷϛεͰϓϩάϥϛϯάݴޠʹసੜͨ͠", ), ), ) Json.encodeToString(comic)
{"id":1,"title":"సੜͨ͠ΒKotlinͩͬͨ","author":"@takuji31","stories":[{"id":1001,"number":1,"title":"ਆ༷ͷϛεͰϓϩάϥϛϯάݴޠʹసੜͨ͠"}]}
!
val comic = Comic( ... ) val format = Json
{ prettyPrint = true } format.encodeToString(comic)
{ "id": 1, "title": "సੜͨ͠ΒKotlinͩͬͨ", "author": "@takuji31", "stories": [ {
"id": 1001, "number": 1, "title": "ਆ༷ͷϛεͰϓϩάϥϛϯάݴޠʹసੜͨ͠" } ] }
prettyPrintҎ֎ͷΦϓγϣϯ docs/json.md#json-configuration
σγϦΞϥΠζ
val json = //get json val comic: Comic = Json.decodeFromString(json)
val format = Json { ignoreUnknownKeys = true } val
json = //get json val comic: Comic = format.decodeFromString(json)
ڝ߹ϥΠϒϥϦʔ ͱͷൺֱ
ൺֱ͢ΔϥΠϒϥϦʔ • Gson • Jackson • Moshi
σγϦΞϥΠζ࣌ͷܗࣜ
ܗࣜ • ϦϑϨΫγϣϯ • kapt • GradleϓϥάΠϯ
֤ϥΠϒϥϦʔͷσγϦΞϥΠζܗࣜ ϥΠϒϥϦʔ ܗࣜ Gson ϦϑϨΫγϣϯ Jackson ϦϑϨΫγϣϯ Moshi ϦϑϨΫγϣϯ/kapt kotlinx.serialization
GradleϓϥάΠϯ
KotlinͷNull SafetyରԠ
֤ϥΠϒϥϦʔͷNull SafetyରԠ ϥΠϒϥϦʔ ରԠ/ඇରԠ Gson ඇରԠ Jackson ରԠ(jackson-module-kotlin) 1 Moshi
ରԠ kotlinx.serialization ରԠ 1 https://github.com/FasterXML/jackson-dataformats-text
JSONҎ֎ͷϑΥʔϚοτͷରԠ
֤ϥΠϒϥϦʔͷରԠϑΥʔϚοτ(Ұ෦) ϥΠϒϥϦʔ ରԠϑΥʔϚοτ Gson ͳ͠ Jackson YAML/CSV/XML/Properties/Protobuf 1 2 Moshi
ͳ͠ kotlinx.serialization YAML/XML/Properties/Protobuf 3 3 https://github.com/Kotlin/kotlinx.serialization/blob/master/formats/README.md 2 https://github.com/FasterXML/jackson-dataformats-binary 1 https://github.com/FasterXML/jackson-dataformats-text
Kotlin Multiplatform Project(KMP/ KMM)ରԠ
֤ϥΠϒϥϦʔͷରԠϑΥʔϚοτ(Ұ෦) ϥΠϒϥϦʔ ରԠ/ඇରԠ Gson ඇରԠ Jackson ඇରԠ Moshi ඇରԠ kotlinx.serialization
ରԠ
·ͱΊ
·ͱΊ • kotlinx.serializationKotlinެࣜγϦΞϥΠθʔγϣϯϥΠϒϥϦʔ • ηοτΞοϓͨ͠Β؆୯ʹ͑Δ • GradleϓϥάΠϯʹΑΔίʔυੜͳͷͰ࣮ߦ࣌/Ϗϧυ࣌ͷύϑΥʔϚϯ ε͕ྑ͍ • JSONҎ֎ʹଟͷϑΥʔϚοτʹରԠ
• ϚϧνϓϥοτϑΥʔϜରԠͰiOSαʔόʔαΠυͰ͑Δ • ϚϧνϓϥοτϑΥʔϜରԠ͍ͯ͠ͳ͍ϑΥʔϚοτ͋ΔͷͰҙ
͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠