1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
/*
* Copyright 2017-2020 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
*/
package kotlinx.serialization.encoding
import kotlinx.serialization.*
import kotlinx.serialization.descriptors.*
/**
* A skeleton implementation of both [Decoder] and [CompositeDecoder] that can be used
* for simple formats and for testability purpose.
* Most of the `decode*` methods have default implementation that delegates `decodeValue(value: Any) as TargetType`.
* See [Decoder] documentation for information about each particular `decode*` method.
*/
@ExperimentalSerializationApi
public abstract class AbstractDecoder : Decoder, CompositeDecoder {
/**
* Invoked to decode a value when specialized `decode*` method was not overridden.
*/
public open fun decodeValue(): Any = throw SerializationException("${this::class} can't retrieve untyped values")
override fun decodeNotNullMark(): Boolean = true
override fun decodeNull(): Nothing? = null
override fun decodeBoolean(): Boolean = decodeValue() as Boolean
override fun decodeByte(): Byte = decodeValue() as Byte
override fun decodeShort(): Short = decodeValue() as Short
override fun decodeInt(): Int = decodeValue() as Int
override fun decodeLong(): Long = decodeValue() as Long
override fun decodeFloat(): Float = decodeValue() as Float
override fun decodeDouble(): Double = decodeValue() as Double
override fun decodeChar(): Char = decodeValue() as Char
override fun decodeString(): String = decodeValue() as String
override fun decodeEnum(enumDescriptor: SerialDescriptor): Int = decodeValue() as Int
override fun decodeInline(descriptor: SerialDescriptor): Decoder = this
// overwrite by default
public open fun <T : Any?> decodeSerializableValue(
deserializer: DeserializationStrategy<T>,
previousValue: T? = null
): T = decodeSerializableValue(deserializer)
override fun beginStructure(descriptor: SerialDescriptor): CompositeDecoder = this
override fun endStructure(descriptor: SerialDescriptor) {
}
final override fun decodeBooleanElement(descriptor: SerialDescriptor, index: Int): Boolean = decodeBoolean()
final override fun decodeByteElement(descriptor: SerialDescriptor, index: Int): Byte = decodeByte()
final override fun decodeShortElement(descriptor: SerialDescriptor, index: Int): Short = decodeShort()
final override fun decodeIntElement(descriptor: SerialDescriptor, index: Int): Int = decodeInt()
final override fun decodeLongElement(descriptor: SerialDescriptor, index: Int): Long = decodeLong()
final override fun decodeFloatElement(descriptor: SerialDescriptor, index: Int): Float = decodeFloat()
final override fun decodeDoubleElement(descriptor: SerialDescriptor, index: Int): Double = decodeDouble()
final override fun decodeCharElement(descriptor: SerialDescriptor, index: Int): Char = decodeChar()
final override fun decodeStringElement(descriptor: SerialDescriptor, index: Int): String = decodeString()
override fun decodeInlineElement(
descriptor: SerialDescriptor,
index: Int
): Decoder = decodeInline(descriptor.getElementDescriptor(index))
override fun <T> decodeSerializableElement(
descriptor: SerialDescriptor,
index: Int,
deserializer: DeserializationStrategy<T>,
previousValue: T?
): T = decodeSerializableValue(deserializer, previousValue)
final override fun <T : Any> decodeNullableSerializableElement(
descriptor: SerialDescriptor,
index: Int,
deserializer: DeserializationStrategy<T?>,
previousValue: T?
): T? = decodeIfNullable(deserializer) {
decodeSerializableValue(deserializer, previousValue)
}
}
|
