Removed charset from public api

formats/json/api/kotlinx-serialization-json.api

@@ -332,9 +332,7 @@ public abstract class kotlinx/serialization/json/JsonTransformingSerializer : ko
 }
 
 public final class kotlinx/serialization/json/JvmStreamsKt {
-	public static final fun decodeFromStream (Lkotlinx/serialization/json/Json;Lkotlinx/serialization/DeserializationStrategy;Ljava/io/InputStream;Ljava/nio/charset/Charset;)Ljava/lang/Object;
-	public static synthetic fun decodeFromStream$default (Lkotlinx/serialization/json/Json;Lkotlinx/serialization/DeserializationStrategy;Ljava/io/InputStream;Ljava/nio/charset/Charset;ILjava/lang/Object;)Ljava/lang/Object;
-	public static final fun encodeToStream (Lkotlinx/serialization/json/Json;Lkotlinx/serialization/SerializationStrategy;Ljava/lang/Object;Ljava/io/OutputStream;Ljava/nio/charset/Charset;)V
-	public static synthetic fun encodeToStream$default (Lkotlinx/serialization/json/Json;Lkotlinx/serialization/SerializationStrategy;Ljava/lang/Object;Ljava/io/OutputStream;Ljava/nio/charset/Charset;ILjava/lang/Object;)V
+	public static final fun decodeFromStream (Lkotlinx/serialization/json/Json;Lkotlinx/serialization/DeserializationStrategy;Ljava/io/InputStream;)Ljava/lang/Object;
+	public static final fun encodeToStream (Lkotlinx/serialization/json/Json;Lkotlinx/serialization/SerializationStrategy;Ljava/lang/Object;Ljava/io/OutputStream;)V
 }
 

formats/json/jvmMain/src/kotlinx/serialization/json/JvmStreams.kt

@@ -3,10 +3,9 @@ package kotlinx.serialization.json
 import kotlinx.serialization.*
 import kotlinx.serialization.json.internal.*
 import java.io.*
-import java.nio.charset.Charset
 
 /**
- * Serializes the [value] with [serializer] into a [stream] using JSON format and given [charset].
+ * Serializes the [value] with [serializer] into a [stream] using JSON format and UTF-8 encoding..
  *
  * @throws [SerializationException] if the given value cannot be serialized to JSON.
  * @throws [IOException] If an I/O error occurs and stream can't be written to.
@@ -15,10 +14,9 @@ import java.nio.charset.Charset
 public fun <T> Json.encodeToStream(
     serializer: SerializationStrategy<T>,
     value: T,
-    stream: OutputStream,
-    charset: Charset = Charsets.UTF_8
+    stream: OutputStream
 ) {
-    val result = JsonToWriterStringBuilder(stream, charset)
+    val result = JsonToWriterStringBuilder(stream)
     try {
         val encoder = StreamingJsonEncoder(
             result, this,
@@ -32,43 +30,41 @@ public fun <T> Json.encodeToStream(
 }
 
 /**
- * Serializes given [value] to [stream] using [charset] and serializer retrieved from the reified type parameter.
+ * Serializes given [value] to [stream] using UTF-8 encoding and serializer retrieved from the reified type parameter.
  *
  * @throws [SerializationException] if the given value cannot be serialized to JSON.
  * @throws [IOException] If an I/O error occurs and stream can't be written to.
  */
 @ExperimentalSerializationApi
 public inline fun <reified T> Json.encodeToStream(
     value: T,
-    stream: OutputStream,
-    charset: Charset = Charsets.UTF_8
+    stream: OutputStream
 ): Unit =
-    encodeToStream(serializersModule.serializer(), value, stream, charset)
+    encodeToStream(serializersModule.serializer(), value, stream)
 
 /**
- * Deserializes JSON from [stream] using [charset] to a value of type [T] using [deserializer].
+ * Deserializes JSON from [stream] using UTF-8 encoding to a value of type [T] using [deserializer].
  *
  * @throws [SerializationException] if the given JSON input cannot be deserialized to the value of type [T].
  * @throws [IOException] If an I/O error occurs and stream can't be read from.
  */
 @ExperimentalSerializationApi
 public fun <T> Json.decodeFromStream(
     deserializer: DeserializationStrategy<T>,
-    stream: InputStream,
-    charset: Charset = Charsets.UTF_8
+    stream: InputStream
 ): T {
-    val lexer = ReaderJsonLexer(stream, charset)
+    val lexer = ReaderJsonLexer(stream)
     val input = StreamingJsonDecoder(this, WriteMode.OBJ, lexer, deserializer.descriptor)
     return input.decodeSerializableValue(deserializer)
 }
 
 /**
- * Deserializes the contents of given [stream] to to the value of type [T] using [charset] and
+ * Deserializes the contents of given [stream] to to the value of type [T] using UTF-8 encoding and
  * deserializer retrieved from the reified type parameter.
  *
  * @throws [SerializationException] if the given JSON input cannot be deserialized to the value of type [T].
  * @throws [IOException] If an I/O error occurs and stream can't be read from.
  */
 @ExperimentalSerializationApi
-public inline fun <reified T> Json.decodeFromStream(stream: InputStream, charset: Charset = Charsets.UTF_8): T =
-    decodeFromStream(serializersModule.serializer(), stream, charset)
+public inline fun <reified T> Json.decodeFromStream(stream: InputStream): T =
+    decodeFromStream(serializersModule.serializer(), stream)

formats/json/jvmMain/src/kotlinx/serialization/json/internal/JsonLexerJvm.kt

@@ -32,7 +32,7 @@ internal class ReaderJsonLexer(
 ) : AbstractJsonLexer() {
     private var threshold: Int = DEFAULT_THRESHOLD // chars
 
-    constructor(i: InputStream, charset: Charset) : this(i.reader(charset).buffered(READER_BUF_SIZE))
+    constructor(i: InputStream, charset: Charset = Charsets.UTF_8) : this(i.reader(charset).buffered(READER_BUF_SIZE))
 
     override var source: CharSequence = ArrayAsSequence(_source)
 

formats/json/jvmMain/src/kotlinx/serialization/json/internal/JsonToWriterStringBuilder.kt

@@ -9,7 +9,7 @@ internal class JsonToWriterStringBuilder(private val writer: Writer) : JsonStrin
     // maybe this can also be taken from the pool, but currently initial char array size there is 128, which is too low.
     CharArray(BATCH_SIZE)
 ) {
-    constructor(os: OutputStream, charset: Charset): this(os.writer(charset).buffered(READER_BUF_SIZE))
+    constructor(os: OutputStream, charset: Charset = Charsets.UTF_8): this(os.writer(charset).buffered(READER_BUF_SIZE))
 
     override fun ensureTotalCapacity(oldSize: Int, additional: Int): Int {
         val requiredSize = oldSize + additional