Matt Bruce
ac486a38bc
Summary: - Sources: Audit, Configuration, Migrations, Models, Protocols (+2 more) Stats: - 37 files changed, 256 insertions(+), 22 deletions(-)
30 lines
1.1 KiB
Swift
30 lines
1.1 KiB
Swift
import Foundation
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/// Utilities for common migration operations.
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public enum MigrationUtils {
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/// Returns `true` if a value can be transformed between the given types.
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public static func canTransform<T, U>(from: T.Type, to: U.Type) -> Bool {
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if T.self is U.Type { return true }
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return T.self == String.self || U.self == String.self
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}
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/// Estimates the size of a data payload in bytes.
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public static func estimatedSize(for data: Data) -> UInt64 {
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UInt64(data.count)
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}
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/// Validates that source and destination descriptors are compatible.
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public static func validateCompatibility(
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source: StorageKeyDescriptor,
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destination: StorageKeyDescriptor
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) throws {
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if source.name == destination.name && source.domain == destination.domain {
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throw MigrationError.validationFailed("Source and destination are identical")
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}
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if source.valueType != destination.valueType {
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throw MigrationError.incompatibleTypes("\(source.valueType) -> \(destination.valueType)")
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}
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}
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}
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