mirror of
https://github.com/JohnEstropia/CoreStore.git
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98 lines
3.0 KiB
Swift
98 lines
3.0 KiB
Swift
//
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// Where.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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public func &&(left: Where, right: Where) -> Where {
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return Where(NSCompoundPredicate(type: .AndPredicateType, subpredicates: [left.predicate, right.predicate]))
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}
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public func ||(left: Where, right: Where) -> Where {
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return Where(NSCompoundPredicate(type: .OrPredicateType, subpredicates: [left.predicate, right.predicate]))
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}
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public prefix func !(clause: Where) -> Where {
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return Where(NSCompoundPredicate(type: .NotPredicateType, subpredicates: [clause.predicate]))
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}
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// MARK: - Where
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public struct Where: FetchClause {
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// MARK: Public
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public init(_ predicate: NSPredicate) {
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self.predicate = predicate
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}
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public init() {
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self.init(true)
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}
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public init(_ value: Bool) {
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self.init(NSPredicate(value: value))
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}
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public init(_ format: String, _ args: NSObject...) {
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self.init(NSPredicate(format: format, argumentArray: args))
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}
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public init(_ format: String, argumentArray: [AnyObject]?) {
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self.init(NSPredicate(format: format, argumentArray: argumentArray))
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}
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public init(_ attributeName: AttributeName, isEqualTo value: NSObject?) {
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self.init(value == nil
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? NSPredicate(format: "\(attributeName) == nil")
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: NSPredicate(format: "\(attributeName) == %@", value!))
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}
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public let predicate: NSPredicate
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// MARK: QueryClause
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public func applyToFetchRequest(fetchRequest: NSFetchRequest) {
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if fetchRequest.predicate != nil {
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HardcoreData.log(.Warning, message: "An existing predicate for the NSFetchRequest was overwritten by Where query clause.")
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}
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fetchRequest.predicate = self.predicate
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}
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}
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