commonMain.kotlinx.serialization.json.internal.JsonStreams.kt Maven / Gradle / Ivy

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Kotlin multiplatform serialization runtime library

There is a newer version: 1.7.3

package kotlinx.serialization.json.internal

import kotlinx.serialization.*
import kotlinx.serialization.json.DecodeSequenceMode
import kotlinx.serialization.json.Json

@RequiresOptIn(level = RequiresOptIn.Level.ERROR)
internal annotation class JsonFriendModuleApi

@JsonFriendModuleApi
public interface InternalJsonWriter {
    public fun writeLong(value: Long)
    public fun writeChar(char: Char)
    public fun write(text: String)
    public fun writeQuoted(text: String)
    public fun release()
}

@JsonFriendModuleApi
public interface InternalJsonReader {
    public fun read(buffer: CharArray, bufferOffset: Int, count: Int): Int
}

@JsonFriendModuleApi
public fun  encodeByWriter(json: Json, writer: InternalJsonWriter, serializer: SerializationStrategy, value: T) {
    val encoder = StreamingJsonEncoder(
        writer, json,
        WriteMode.OBJ,
        arrayOfNulls(WriteMode.entries.size)
    )
    encoder.encodeSerializableValue(serializer, value)
}

@JsonFriendModuleApi
public fun  decodeByReader(
    json: Json,
    deserializer: DeserializationStrategy,
    reader: InternalJsonReader
): T {
    val lexer = ReaderJsonLexer(json, reader)
    try {
        val input = StreamingJsonDecoder(json, WriteMode.OBJ, lexer, deserializer.descriptor, null)
        val result = input.decodeSerializableValue(deserializer)
        lexer.expectEof()
        return result
    } finally {
        lexer.release()
    }
}

@JsonFriendModuleApi
@ExperimentalSerializationApi
public fun  decodeToSequenceByReader(
    json: Json,
    reader: InternalJsonReader,
    deserializer: DeserializationStrategy,
    format: DecodeSequenceMode = DecodeSequenceMode.AUTO_DETECT
): Sequence {
    val lexer = ReaderJsonLexer(json, reader, CharArray(BATCH_SIZE)) // Unpooled buffer due to lazy nature of sequence
    val iter = JsonIterator(format, json, lexer, deserializer)
    return Sequence { iter }.constrainOnce()
}

@JsonFriendModuleApi
@ExperimentalSerializationApi
public inline fun  decodeToSequenceByReader(
    json: Json,
    reader: InternalJsonReader,
    format: DecodeSequenceMode = DecodeSequenceMode.AUTO_DETECT
): Sequence = decodeToSequenceByReader(json, reader, json.serializersModule.serializer(), format)