CoreStore/Sources/AttributeProtocol.swift

//
//  AttributeProtocol.swift
//  CoreStore
//
//  Copyright © 2018 John Rommel Estropia
//
//  Permission is hereby granted, free of charge, to any person obtaining a copy
//  of this software and associated documentation files (the "Software"), to deal
//  in the Software without restriction, including without limitation the rights
//  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
//  copies of the Software, and to permit persons to whom the Software is
//  furnished to do so, subject to the following conditions:
//
//  The above copyright notice and this permission notice shall be included in all
//  copies or substantial portions of the Software.
//
//  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
//  SOFTWARE.
//

import Foundation
import CoreData


// MARK: - AttributeProtocol

internal protocol AttributeProtocol: AnyObject, PropertyProtocol {

    typealias EntityDescriptionValues = (
        attributeType: NSAttributeType,
        isOptional: Bool,
        isTransient: Bool,
        allowsExternalBinaryDataStorage: Bool,
        versionHashModifier: String?,
        renamingIdentifier: String?,
        affectedByKeyPaths: Set<String>,
        defaultValue: Any?
    )

    var entityDescriptionValues: () -> EntityDescriptionValues { get }
    var rawObject: CoreStoreManagedObject? { get set }
    var getter: CoreStoreManagedObject.CustomGetter? { get }
    var setter: CoreStoreManagedObject.CustomSetter? { get }
    var valueForSnapshot: Any? { get }
}