103 lines
3.1 KiB
Swift
103 lines
3.1 KiB
Swift
import Foundation
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import DataLiteCore
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final class KeyedContainer<Decoder: RowDecoder & KeyCheckingDecoder, Key: CodingKey>: Container, KeyedDecodingContainerProtocol {
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// MARK: - Properties
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let decoder: Decoder
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let codingPath: [any CodingKey]
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let allKeys: [Key]
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// MARK: - Inits
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init(
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decoder: Decoder,
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codingPath: [any CodingKey],
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allKeys: [Key]
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) {
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self.decoder = decoder
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self.codingPath = codingPath
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self.allKeys = allKeys
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}
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// MARK: - Container Methods
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func contains(_ key: Key) -> Bool {
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decoder.contains(key)
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}
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func decodeNil(forKey key: Key) throws -> Bool {
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try decoder.decodeNil(for: key)
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}
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func decode<T: Decodable>(_ type: T.Type, forKey key: Key) throws -> T {
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switch type {
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case is Date.Type:
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try decoder.decodeDate(for: key) as! T
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case let type as SQLiteRepresentable.Type:
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try decoder.decode(type, for: key) as! T
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default:
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try T(from: decoder.decoder(for: key))
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}
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}
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func nestedContainer<NestedKey: CodingKey>(
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keyedBy type: NestedKey.Type,
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forKey key: Key
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) throws -> KeyedDecodingContainer<NestedKey> {
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let info = """
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Attempted to decode a nested keyed container for key '\(key.stringValue)',
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but the value cannot be represented as a keyed container.
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"""
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let context = DecodingError.Context(
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codingPath: codingPath + [key],
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debugDescription: info
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)
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throw DecodingError.typeMismatch(
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KeyedDecodingContainer<NestedKey>.self,
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context
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)
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}
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func nestedUnkeyedContainer(
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forKey key: Key
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) throws -> any UnkeyedDecodingContainer {
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let info = """
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Attempted to decode a nested unkeyed container for key '\(key.stringValue)',
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but the value cannot be represented as an unkeyed container.
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"""
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let context = DecodingError.Context(
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codingPath: codingPath + [key],
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debugDescription: info
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)
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throw DecodingError.typeMismatch(
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UnkeyedDecodingContainer.self,
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context
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)
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}
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func superDecoder() throws -> any Swift.Decoder {
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let info = """
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Attempted to get a superDecoder,
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but SQLiteRowDecoder does not support superDecoding.
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"""
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let context = DecodingError.Context(
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codingPath: codingPath,
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debugDescription: info
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)
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throw DecodingError.typeMismatch(Swift.Decoder.self, context)
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}
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func superDecoder(forKey key: Key) throws -> any Swift.Decoder {
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let info = """
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Attempted to get a superDecoder for key '\(key.stringValue)',
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but SQLiteRowDecoder does not support nested structures.
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"""
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let context = DecodingError.Context(
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codingPath: codingPath + [key],
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debugDescription: info
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)
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throw DecodingError.typeMismatch(Swift.Decoder.self, context)
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}
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}
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