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package kotlinx.serialization.json.internal
import kotlinx.serialization.*
import kotlinx.serialization.internal.*
import kotlinx.serialization.json.*
import kotlinx.serialization.modules.*
import kotlin.jvm.*
internal class StreamingJsonOutput(private val composer: Composer, override val json: Json, private val mode: WriteMode,
private val modeReuseCache: Array<JsonOutput?>) : JsonOutput, ElementValueEncoder() {
internal constructor(
output: StringBuilder, json: Json, mode: WriteMode,
modeReuseCache: Array<JsonOutput?>
) : this(Composer(output, json), json, mode, modeReuseCache)
public override val context: SerialModule = json.context
private val configuration = json.configuration
// Forces serializer to wrap all values into quotes
private var forceQuoting: Boolean = false
private var writePolymorphic = false
init {
val i = mode.ordinal
if (modeReuseCache[i] !== null || modeReuseCache[i] !== this)
modeReuseCache[i] = this
}
override fun encodeJson(element: JsonElement) {
encodeSerializableValue(JsonElementSerializer, element)
}
override fun shouldEncodeElementDefault(desc: SerialDescriptor, index: Int): Boolean {
return configuration.encodeDefaults
}
override fun <T> encodeSerializableValue(serializer: SerializationStrategy<T>, value: T) {
encodePolymorphically(serializer, value) {
writePolymorphic = true
}
}
private fun encodeTypeInfo(descriptor: SerialDescriptor) {
composer.nextItem()
encodeString(configuration.classDiscriminator)
composer.print(COLON)
composer.space()
encodeString(descriptor.name)
}
override fun beginStructure(desc: SerialDescriptor, vararg typeParams: KSerializer<*>): CompositeEncoder {
val newMode = switchMode(desc, typeParams)
if (newMode.begin != INVALID) { // entry
composer.print(newMode.begin)
composer.indent()
}
if (writePolymorphic) {
writePolymorphic = false
encodeTypeInfo(desc)
}
if (mode == newMode) {
return this
}
return modeReuseCache[newMode.ordinal] ?: StreamingJsonOutput(composer, json, newMode, modeReuseCache)
}
override fun endStructure(desc: SerialDescriptor) {
if (mode.end != INVALID) {
composer.unIndent()
composer.nextItem()
composer.print(mode.end)
}
}
override fun encodeElement(desc: SerialDescriptor, index: Int): Boolean {
when (mode) {
WriteMode.LIST -> {
if (!composer.writingFirst)
composer.print(COMMA)
composer.nextItem()
}
WriteMode.MAP -> {
if (!composer.writingFirst) {
if (index % 2 == 0) {
composer.print(COMMA)
composer.nextItem() // indent should only be put after commas in map
forceQuoting = true
} else {
composer.print(COLON)
composer.space()
forceQuoting = false
}
} else {
forceQuoting = true
composer.nextItem()
}
}
WriteMode.POLY_OBJ -> {
if (index == 0)
forceQuoting = true
if (index == 1) {
composer.print(COMMA)
composer.space()
forceQuoting = false
}
}
else -> {
if (!composer.writingFirst)
composer.print(COMMA)
composer.nextItem()
encodeString(desc.getElementName(index))
composer.print(COLON)
composer.space()
}
}
return true
}
override fun encodeNull() {
composer.print(NULL)
}
override fun encodeBoolean(value: Boolean) {
if (forceQuoting) encodeString(value.toString()) else composer.print(value)
}
override fun encodeByte(value: Byte) {
if (forceQuoting) encodeString(value.toString()) else composer.print(value)
}
override fun encodeShort(value: Short) {
if (forceQuoting) encodeString(value.toString()) else composer.print(value)
}
override fun encodeInt(value: Int) {
if (forceQuoting) encodeString(value.toString()) else composer.print(value)
}
override fun encodeLong(value: Long) {
if (forceQuoting) encodeString(value.toString()) else composer.print(value)
}
override fun encodeFloat(value: Float) {
if (configuration.strictMode && !value.isFinite()) {
throw JsonInvalidValueInStrictModeException(value)
}
if (forceQuoting) encodeString(value.toString()) else composer.print(value)
}
override fun encodeDouble(value: Double) {
if (configuration.strictMode && !value.isFinite()) {
throw JsonInvalidValueInStrictModeException(value)
}
if (forceQuoting) encodeString(value.toString()) else composer.print(value)
}
override fun encodeChar(value: Char) {
encodeString(value.toString())
}
override fun encodeString(value: String) {
if (configuration.unquoted && !shouldBeQuoted(value)) {
composer.print(value)
} else {
composer.printQuoted(value)
}
}
override fun encodeEnum(enumDescription: EnumDescriptor, ordinal: Int) {
encodeString(enumDescription.getElementName(ordinal))
}
override fun encodeValue(value: Any) {
if (configuration.strictMode) super.encodeValue(value) else
encodeString(value.toString())
}
internal class Composer(@JvmField internal val sb: StringBuilder, private val json: Json) {
private var level = 0
var writingFirst = true
private set
fun indent() {
writingFirst = true; level++
}
fun unIndent() {
level--
}
fun nextItem() {
writingFirst = false
if (json.configuration.prettyPrint) {
print("\n")
repeat(level) { print(json.configuration.indent) }
}
}
fun space() {
if (json.configuration.prettyPrint)
print(' ')
}
fun print(v: Char) = sb.append(v)
fun print(v: String) = sb.append(v)
fun print(v: Float) = sb.append(v)
fun print(v: Double) = sb.append(v)
fun print(v: Byte) = sb.append(v)
fun print(v: Short) = sb.append(v)
fun print(v: Int) = sb.append(v)
fun print(v: Long) = sb.append(v)
fun print(v: Boolean) = sb.append(v)
fun printQuoted(value: String): Unit = sb.printQuoted(value)
}
}
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