Protobuf in Kotlin

Transcript

2. @takusemba https://github.com/TakuSemba
3. Protocol Buffers
4. Json Protocol buffers
9. Wire Clean, lightweight protocol buffers for Android and Java.
10. syntax = "proto3"; package com.takusemba; option java_package = "com.takusemba.proto"; enum Size { SMALL = 0; MEDIUM = 1; LARGE = 2; } message Coffee { string name = 1; // espresso double price = 2; // 340 Size size = 3; // small / medium / large bool isAvailable = 4; // true / false }
13. data class Coffee( /** * ex) espresso */ @field:WireField(tag = 1, adapter = "com.squareup.wire.ProtoAdapter#STRING") val name: String? = null, /** * ex) 340 */ @field:WireField(tag = 2, adapter = "com.squareup.wire.ProtoAdapter#DOUBLE") val price: Double? = null, /** * ex) small / medium / large */ @field:WireField(tag = 3, adapter = "com.takusemba.proto.Size#ADAPTER") val size: Size? = null, /** * ex) true / false */ @field:WireField(tag = 4, adapter = "com.squareup.wire.ProtoAdapter#BOOL") val isAvailable: Boolean? = null, val unknownFields: ByteString = ByteString.EMPTY ) : Message<Coffee, Coffee.Builder>(ADAPTER, unknownFields) { … }
14. data class Coffee( /** * ex) espresso */ @field:WireField(tag = 1, adapter = "com.squareup.wire.ProtoAdapter#STRING") val name: String? = null, /** * ex) 340 */ @field:WireField(tag = 2, adapter = "com.squareup.wire.ProtoAdapter#DOUBLE") val price: Double? = null, /** * ex) small / medium / large */ @field:WireField(tag = 3, adapter = "com.takusemba.proto.Size#ADAPTER") val size: Size? = null, /** * ex) true / false */ @field:WireField(tag = 4, adapter = "com.squareup.wire.ProtoAdapter#BOOL") val isAvailable: Boolean? = null, val unknownFields: ByteString = ByteString.EMPTY ) : Message<Coffee, Coffee.Builder>(ADAPTER, unknownFields) { … } val name: String? = null, val price: Double? = null, val size: Size? = null, val isAvailable: Boolean? = null,
15. data class Coffee( /** * ex) espresso */ @field:WireField(tag = 1, adapter = "com.squareup.wire.ProtoAdapter#STRING") val name: String? = null, /** * ex) 340 */ @field:WireField(tag = 2, adapter = "com.squareup.wire.ProtoAdapter#DOUBLE") val price: Double? = null, /** * ex) small / medium / large */ @field:WireField(tag = 3, adapter = "com.takusemba.proto.Size#ADAPTER") val size: Size? = null, /** * ex) true / false */ @field:WireField(tag = 4, adapter = "com.squareup.wire.ProtoAdapter#BOOL") val isAvailable: Boolean? = null, val unknownFields: ByteString = ByteString.EMPTY ) : Message<Coffee, Coffee.Builder>(ADAPTER, unknownFields) { … } data class Coffee(
16. --java_interop
17. --java_interop val coffee = Coffee( name = "espresso", price = 310.0, size = Size.SMALL, isAvailable = true )
18. --java_interop val coffee = Coffee( name = "espresso", price = 310.0, size = Size.SMALL, isAvailable = true ) val coffee = Coffee.Builder() .name("espresso") .price(310.0) .size(Size.SMALL) .isAvailable(true) .build()
19. --java_interop val coffee = Coffee( name = "espresso", price = 310.0, size = Size.SMALL, isAvailable = true ) val coffee = Coffee.Builder() .name("espresso") .price(310.0) .size(Size.SMALL) .isAvailable(true) .build() val name: String
20. --java_interop val coffee = Coffee( name = "espresso", price = 310.0, size = Size.SMALL, isAvailable = true ) val coffee = Coffee.Builder() .name("espresso") .price(310.0) .size(Size.SMALL) .isAvailable(true) .build() val name: String @JvmField val name: String
21. kotlin nullability
22. kotlin nullability syntax = "proto3"; package com.takusemba; option java_package = "com.takusemba.proto"; enum Size { SMALL = 0; MEDIUM = 1; LARGE = 2; } message Coffee { string name = 1; // espresso double price = 2; // 340 Size size = 3; // small / medium / large bool isAvailable = 4; // true / false }
23. kotlin nullability syntax = "proto3"; package com.takusemba; option java_package = "com.takusemba.proto"; enum Size { SMALL = 0; MEDIUM = 1; LARGE = 2; } message Coffee { string name = 1; // espresso double price = 2; // 340 Size size = 3; // small / medium / large bool isAvailable = 4; // true / false } syntax = "proto3";
24. kotlin nullability syntax = “proto2"; package com.takusemba; option java_package = "com.takusemba.proto"; enum Size { SMALL = 0; MEDIUM = 1; LARGE = 2; } message Coffee { string name = 1; // espresso double price = 2; // 340 Size size = 3; // small / medium / large bool isAvailable = 4; // true / false } syntax = “proto2";
25. kotlin nullability syntax = “proto2"; package com.takusemba; option java_package = "com.takusemba.proto"; enum Size { SMALL = 0; MEDIUM = 1; LARGE = 2; } message Coffee { string name = 1; // espresso double price = 2; // 340 Size size = 3; // small / medium / large bool isAvailable = 4; // true / false } message Coffee { string name = 1; // espresso double price = 2; // 340 Size size = 3; // small / medium / large bool isAvailable = 4; // true / false }
26. kotlin nullability syntax = "proto2"; package com.takusemba; option java_package = "com.takusemba.proto"; enum Size { SMALL = 0; MEDIUM = 1; LARGE = 2; } message Coffee { required string name = 1; // espresso required double price = 2; // 340 required Size size = 3; // small / medium / large optional bool isAvailable = 4; // true / false } message Coffee { required string name = 1; // espresso required double price = 2; // 340 required Size size = 3; // small / medium / large optional bool isAvailable = 4; // true / false }
27. kotlin nullability syntax = "proto2"; package com.takusemba; option java_package = "com.takusemba.proto"; enum Size { SMALL = 0; MEDIUM = 1; LARGE = 2; } message Coffee { required string name = 1; // espresso required double price = 2; // 340 required Size size = 3; // small / medium / large optional bool isAvailable = 4; // true / false }
28. data class Coffee( /** * ex) espresso */ @field:WireField(tag = 1, adapter = "com.squareup.wire.ProtoAdapter#STRING") val name: String, /** * ex) 340 */ @field:WireField(tag = 2, adapter = "com.squareup.wire.ProtoAdapter#DOUBLE") val price: Double, /** * ex) small / medium / large */ @field:WireField(tag = 3, adapter = "com.takusemba.proto.Size#ADAPTER") val size: Size, /** * ex) true / false */ @field:WireField(tag = 4, adapter = "com.squareup.wire.ProtoAdapter#BOOL") val isAvailable: Boolean? = null, val unknownFields: ByteString = ByteString.EMPTY ) : Message<Coffee, Coffee.Builder>(ADAPTER, unknownFields) { … }
29. data class Coffee( /** * ex) espresso */ @field:WireField(tag = 1, adapter = "com.squareup.wire.ProtoAdapter#STRING") val name: String, /** * ex) 340 */ @field:WireField(tag = 2, adapter = "com.squareup.wire.ProtoAdapter#DOUBLE") val price: Double, /** * ex) small / medium / large */ @field:WireField(tag = 3, adapter = "com.takusemba.proto.Size#ADAPTER") val size: Size, /** * ex) true / false */ @field:WireField(tag = 4, adapter = "com.squareup.wire.ProtoAdapter#BOOL") val isAvailable: Boolean? = null, val unknownFields: ByteString = ByteString.EMPTY ) : Message<Coffee, Coffee.Builder>(ADAPTER, unknownFields) { … } val name: String, // required val price: Double, // required val size: Size, // required val isAvailable: Boolean? = null, // optional
30. https://github.com/takusemba https://twitter.com/takusemba