mirror of
https://github.com/JohnEstropia/CoreStore.git
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67 lines
3.1 KiB
Swift
67 lines
3.1 KiB
Swift
//
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// NSFetchedResultsController+ObjectiveC.swift
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// CoreStore
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//
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// Copyright © 2016 John Rommel Estropia
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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//
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import Foundation
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import CoreData
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#if os(iOS) || os(watchOS) || os(tvOS)
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// MARK: - NSFetchedResultsController
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public extension NSFetchedResultsController {
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/**
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Utility for creating an `NSFetchedResultsController` from a `CSDataStack`. This is useful when an `NSFetchedResultsController` is preferred over the overhead of `CSListMonitor`s abstractio
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- parameter dataStack: the `CSDataStack` to observe objects from
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- parameter fetchRequest: the `NSFetchRequest` instance to use with the `NSFetchedResultsController`
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- parameter from: an optional `CSFrom` clause indicating the entity type. If not specified, the `fetchRequest` argument's `entity` property should already be set.
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- parameter sectionBy: a `CSSectionBy` clause indicating the keyPath for the attribute to use when sorting the list into sections.
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- parameter fetchClauses: a series of `FetchClause` instances for fetching the object list. Accepts `CSWhere`, `CSOrderBy`, and `CSTweak` clauses.
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*/
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@objc
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public static func cs_createForStack(dataStack: CSDataStack, fetchRequest: NSFetchRequest, from: CSFrom?, sectionBy: CSSectionBy?, fetchClauses: [CSFetchClause]) -> NSFetchedResultsController {
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return CoreStoreFetchedResultsController(
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context: dataStack.bridgeToSwift.mainContext,
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fetchRequest: fetchRequest,
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from: from?.bridgeToSwift,
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sectionBy: sectionBy?.bridgeToSwift,
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applyFetchClauses: { fetchRequest in
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fetchClauses.forEach { $0.applyToFetchRequest(fetchRequest) }
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CoreStore.assert(
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fetchRequest.sortDescriptors?.isEmpty == false,
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"An \(cs_typeName(NSFetchedResultsController)) requires a sort information. Specify from a \(cs_typeName(CSOrderBy)) clause or any custom \(cs_typeName(CSFetchClause)) that provides a sort descriptor."
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)
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}
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)
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}
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}
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#endif
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