mirror of
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100 lines
3.3 KiB
Swift
100 lines
3.3 KiB
Swift
//
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// AggregateFunction.swift
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// HardcoreData
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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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// MARK: - AggregateFunction
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public enum AggregateFunction {
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// MARK: Public
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case Average(AttributeName)
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case Sum(AttributeName)
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case Count(AttributeName)
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case Minimum(AttributeName)
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case Maximum(AttributeName)
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case Medium(AttributeName)
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case Mode(AttributeName)
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case StandardDeviation(AttributeName)
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// MARK: Internal
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internal func createExpression() -> NSExpression {
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switch self {
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case .Average(let attributeName):
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return NSExpression(
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forFunction: "average:",
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arguments: [NSExpression(forKeyPath: "\(attributeName)")]
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)
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case .Sum(let attributeName):
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return NSExpression(
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forFunction: "sum:",
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arguments: [NSExpression(forKeyPath: "\(attributeName)")]
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)
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case .Count(let attributeName):
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return NSExpression(
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forFunction: "count:",
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arguments: [NSExpression(forKeyPath: "\(attributeName)")]
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)
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case .Minimum(let attributeName):
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return NSExpression(
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forFunction: "min:",
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arguments: [NSExpression(forKeyPath: "\(attributeName)")]
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)
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case .Maximum(let attributeName):
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return NSExpression(
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forFunction: "max:",
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arguments: [NSExpression(forKeyPath: "\(attributeName)")]
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)
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case .Medium(let attributeName):
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return NSExpression(
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forFunction: "medium:",
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arguments: [NSExpression(forKeyPath: "\(attributeName)")]
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)
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case .Mode(let attributeName):
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return NSExpression(
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forFunction: "mode:",
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arguments: [NSExpression(forKeyPath: "\(attributeName)")]
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)
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case .StandardDeviation(let attributeName):
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return NSExpression(
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forFunction: "stddev:",
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arguments: [NSExpression(forKeyPath: "\(attributeName)")]
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)
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}
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}
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}
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