mirror of
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81 lines
2.8 KiB
Swift
81 lines
2.8 KiB
Swift
//
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// GroupBy.swift
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// HardcoreData
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//
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// Copyright (c) 2015 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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// MARK: - GroupBy
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public struct GroupBy: QueryClause {
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// MARK: Public
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public init(_ keyPaths: [KeyPath]) {
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self.keyPaths = keyPaths
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}
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public init() {
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self.init([])
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}
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public init(_ keyPath: KeyPath, _ subKeyPaths: KeyPath...) {
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self.init([keyPath] + subKeyPaths)
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}
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public let keyPaths: [KeyPath]
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// MARK: QueryClause
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public func applyToFetchRequest(fetchRequest: NSFetchRequest) {
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if fetchRequest.propertiesToGroupBy != nil {
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HardcoreData.log(.Warning, message: "An existing \"propertiesToGroupBy\" for the <\(NSFetchRequest.self)> was overwritten by <\(self.dynamicType)> query clause.")
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}
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fetchRequest.propertiesToGroupBy = self.keyPaths
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// let entityDescription = fetchRequest.entity!
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// let propertyMapping = entityDescription.propertiesByName
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// fetchRequest.propertiesToGroupBy = self.keyPaths.reduce([AnyObject]()) { (var properties, keyPath) -> [AnyObject] in
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//
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// if let propertyDescription: AnyObject = propertyMapping[keyPath] {
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//
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// properties.append(propertyDescription)
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// }
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// else {
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//
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// HardcoreData.log(.Warning, message: "The property \"\(keyPath)\" does not exist in entity <\(entityDescription.managedObjectClassName)> and will be ignored by <\(self.dynamicType)> query clause.")
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// }
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//
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// return properties
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// }
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}
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}
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