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/*
* Copyright 2017-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
*/
package sample
import kotlinx.serialization.*
import kotlinx.serialization.descriptors.SerialDescriptor
import kotlinx.serialization.encoding.AbstractDecoder
import kotlinx.serialization.encoding.AbstractEncoder
import kotlinx.serialization.encoding.CompositeDecoder
import kotlinx.serialization.encoding.CompositeEncoder
import kotlinx.serialization.modules.*
import kotlin.test.Test
import kotlin.test.assertEquals
import kotlin.test.assertNotSame
class BasicTypesSerializationTest {
enum class Attitude { POSITIVE, NEUTRAL, NEGATIVE }
@Serializable
data class Tree(val name: String, val left: Tree? = null, val right: Tree? = null)
@Serializable
data class TypesUmbrella(
val unit: Unit,
val boolean: Boolean,
val byte: Byte,
val short: Short,
val int: Int,
val long: Long,
val float: Float,
val double: Double,
val char: Char,
val string: String,
val enum: Attitude,
val intData: IntData,
val unitN: Unit?,
val booleanN: Boolean?,
val byteN: Byte?,
val shortN: Short?,
val intN: Int?,
val longN: Long?,
val floatN: Float?,
val doubleN: Double?,
val charN: Char?,
val stringN: String?,
val enumN: Attitude?,
val intDataN: IntData?,
val listInt: List<Int>,
val listIntN: List<Int?>,
val listNInt: Set<Int>?,
val listNIntN: MutableSet<Int?>?,
val listListEnumN: List<List<Attitude?>>,
val listIntData: List<IntData>,
val listIntDataN: MutableList<IntData?>,
val tree: Tree,
val mapStringInt: Map<String, Int>,
val mapIntStringN: Map<Int, String?>,
val arrays: ArraysUmbrella
)
@Serializable
data class ArraysUmbrella(
val arrByte: Array<Byte>,
val arrInt: Array<Int>,
val arrIntN: Array<Int?>,
val arrIntData: Array<IntData>
) {
override fun equals(other: Any?) = other is ArraysUmbrella &&
arrByte.contentEquals(other.arrByte) &&
arrInt.contentEquals(other.arrInt) &&
arrIntN.contentEquals(other.arrIntN) &&
arrIntData.contentEquals(other.arrIntData)
}
val data = TypesUmbrella(
Unit, true, 10, 20, 30, 40, 50f, 60.0, 'A', "Str0", Attitude.POSITIVE, IntData(70),
null, null, 11, 21, 31, 41, 51f, 61.0, 'B', "Str1", Attitude.NEUTRAL, null,
listOf(1, 2, 3),
listOf(4, 5, null),
setOf(6, 7, 8),
mutableSetOf(null, 9, 10),
listOf(listOf(Attitude.NEGATIVE, null)),
listOf(IntData(1), IntData(2), IntData(3)),
mutableListOf(IntData(1), null, IntData(3)),
Tree("root", Tree("left"), Tree("right", Tree("right.left"), Tree("right.right"))),
mapOf("one" to 1, "two" to 2, "three" to 3),
mapOf(0 to null, 1 to "first", 2 to "second"),
ArraysUmbrella(
arrayOf(1, 2, 3),
arrayOf(100, 200, 300),
arrayOf(null, -1, -2),
arrayOf(IntData(1), IntData(2))
)
)
@Serializable
class WithSecondaryConstructor(var someProperty: Int) {
var test: String = "Test"
constructor() : this(42)
override fun equals(other: Any?): Boolean {
if (this === other) return true
if (other !is WithSecondaryConstructor) return false
if (someProperty != other.someProperty) return false
if (test != other.test) return false
return true
}
override fun hashCode(): Int {
var result = someProperty
result = 31 * result + test.hashCode()
return result
}
}
// KeyValue Input/Output
@OptIn(ExperimentalSerializationApi::class)
class KeyValueOutput(val sb: StringBuilder) : AbstractEncoder() {
override val serializersModule: SerializersModule = EmptySerializersModule()
override fun beginStructure(descriptor: SerialDescriptor): CompositeEncoder {
sb.append('{')
return this
}
override fun endStructure(descriptor: SerialDescriptor) {
sb.append('}')
}
override fun encodeElement(descriptor: SerialDescriptor, index: Int): Boolean {
if (index > 0) sb.append(", ")
sb.append(descriptor.getElementName(index))
sb.append(':')
return true
}
override fun encodeNull() {
sb.append("null")
}
override fun encodeValue(value: Any) {
sb.append(value)
}
override fun encodeString(value: String) {
sb.append('"')
sb.append(value)
sb.append('"')
}
override fun encodeChar(value: Char) = encodeString(value.toString())
}
class KeyValueInput(val inp: Parser) : AbstractDecoder() {
override val serializersModule: SerializersModule = EmptySerializersModule()
override fun beginStructure(descriptor: SerialDescriptor): CompositeDecoder {
inp.expectAfterWhiteSpace('{')
return this
}
override fun endStructure(descriptor: SerialDescriptor) = inp.expectAfterWhiteSpace('}')
override fun decodeElementIndex(descriptor: SerialDescriptor): Int {
inp.skipWhitespace(',')
val name = inp.nextUntil(':', '}')
if (name.isEmpty())
return CompositeDecoder.DECODE_DONE
val index = descriptor.getElementIndex(name)
inp.expect(':')
return index
}
private fun readToken(): String {
inp.skipWhitespace()
return inp.nextUntil(' ', ',', '}')
}
override fun decodeNotNullMark(): Boolean {
inp.skipWhitespace()
if (inp.cur != 'n'.code) return true
return false
}
override fun decodeNull(): Nothing? {
check(readToken() == "null") { "'null' expected" }
return null
}
override fun decodeBoolean(): Boolean = readToken() == "true"
override fun decodeByte(): Byte = readToken().toByte()
override fun decodeShort(): Short = readToken().toShort()
override fun decodeInt(): Int = readToken().toInt()
override fun decodeLong(): Long = readToken().toLong()
override fun decodeFloat(): Float = readToken().toFloat()
override fun decodeDouble(): Double = readToken().toDouble()
override fun decodeEnum(enumDescriptor: SerialDescriptor): Int {
return readToken().toInt()
}
override fun decodeString(): String {
inp.expectAfterWhiteSpace('"')
val value = inp.nextUntil('"')
inp.expect('"')
return value
}
override fun decodeChar(): Char = decodeString().single()
}
// Very simple char-by-char parser
class Parser(private val inp: StringReader) {
var cur: Int = inp.read()
fun next() {
cur = inp.read()
}
fun skipWhitespace(vararg c: Char) {
while (cur >= 0 && (cur.toChar().isWhitespace() || cur.toChar() in c))
next()
}
fun expect(c: Char) {
check(cur == c.code) { "Expected '$c'" }
next()
}
fun expectAfterWhiteSpace(c: Char) {
skipWhitespace()
expect(c)
}
fun nextUntil(vararg c: Char): String {
val sb = StringBuilder()
while (cur >= 0 && cur.toChar() !in c) {
sb.append(cur.toChar())
next()
}
return sb.toString()
}
}
class StringReader(val str: String) {
private var position: Int = 0
fun read(): Int = when (position) {
str.length -> -1
else -> str[position++].code
}
}
@Test
fun testKvSerialization() {
// serialize to string
val sb = StringBuilder()
val out = KeyValueOutput(sb)
out.encodeSerializableValue(TypesUmbrella.serializer(), data)
// deserialize from string
val str = sb.toString()
val inp = KeyValueInput(Parser(StringReader(str)))
val other = inp.decodeSerializableValue(TypesUmbrella.serializer())
// assert we've got it back from string
assertEquals(data, other)
assertNotSame(data, other)
}
@Test
fun someConstructor() {
assertStringFormAndRestored("""{"someProperty":42,"test":"Test"}""", WithSecondaryConstructor(), WithSecondaryConstructor.serializer())
}
}
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