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6ee917b | 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 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 | import Foundation
protocol MultiDomainMixerDomain: RawRepresentableString, GenericDomainProvider {
var countEnsembleMember: Int { get }
func getReader(lat: Float, lon: Float, elevation: Float, mode: GridSelectionMode, options: GenericReaderOptions) throws -> [any GenericReaderProtocol]
func getReader(gridpoint: Int, options: GenericReaderOptions) throws -> (any GenericReaderProtocol)?
}
/// Combine multiple independent weather models, that may not have given forecast variable
struct GenericReaderMulti<Variable: GenericVariableMixable, Domain: MultiDomainMixerDomain>: GenericReaderProvider {
private let reader: [any GenericReaderProtocol]
let domain: Domain
var modelLat: Float {
reader.last!.modelLat
}
var modelLon: Float {
reader.last!.modelLon
}
var targetElevation: Float {
reader.last!.targetElevation
}
var modelDtSeconds: Int {
reader.first!.modelDtSeconds
}
var modelElevation: ElevationOrSea {
reader.last!.modelElevation
}
public init(domain: Domain, reader: [any GenericReaderProtocol]) {
self.reader = reader
self.domain = domain
}
public init?(domain: Domain, lat: Float, lon: Float, elevation: Float, mode: GridSelectionMode, options: GenericReaderOptions) throws {
let reader = try domain.getReader(lat: lat, lon: lon, elevation: elevation, mode: mode, options: options)
guard !reader.isEmpty else {
return nil
}
self.domain = domain
self.reader = reader
}
public init?(domain: Domain, gridpoint: Int, options: GenericReaderOptions) throws {
guard let reader = try domain.getReader(gridpoint: gridpoint, options: options) else {
return nil
}
self.domain = domain
self.reader = [reader]
}
func prefetchData(variable: Variable, time: TimerangeDtAndSettings) throws {
for reader in reader {
if try reader.prefetchData(mixed: variable.rawValue, time: time) {
break
}
}
}
func prefetchData(variables: [Variable], time: TimerangeDtAndSettings) throws {
try variables.forEach { variable in
try prefetchData(variable: variable, time: time)
}
}
func get(variable: Variable, time: TimerangeDtAndSettings) throws -> DataAndUnit? {
// Last reader return highest resolution data. therefore reverse iteration
// Integrate now lower resolution models
var data: [Float]? = nil
var unit: SiUnit? = nil
if variable.requiresOffsetCorrectionForMixing {
for r in reader.reversed() {
guard let d = try r.get(mixed: variable.rawValue, time: time) else {
continue
}
if data == nil {
// first iteration
data = d.data
unit = d.unit
data?.deltaEncode()
} else {
data?.integrateIfNaNDeltaCoded(d.data)
}
if data?.containsNaN() == false {
break
}
}
// undo delta operation
data?.deltaDecode()
data?.greater(than: 0)
} else {
// default case, just place new data in 1:1
for r in reader.reversed() {
guard let d = try r.get(mixed: variable.rawValue, time: time) else {
continue
}
if data == nil {
// first iteration
data = d.data
unit = d.unit
} else {
data?.integrateIfNaN(d.data)
}
if data?.containsNaN() == false {
break
}
}
}
guard let data, let unit else {
return nil
}
return DataAndUnit(data, unit)
}
}
/// Conditional conformace just use RawValue (String) to resolve `ForecastVariable` to a specific type
extension GenericReaderProtocol {
func get(mixed: String, time: TimerangeDtAndSettings) throws -> DataAndUnit? {
guard let v = MixingVar(rawValue: mixed) else {
return nil
}
return try self.get(variable: v, time: time)
}
func prefetchData(mixed: String, time: TimerangeDtAndSettings) throws -> Bool {
guard let v = MixingVar(rawValue: mixed) else {
return false
}
try self.prefetchData(variable: v, time: time)
return true
}
}
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