LeadKit/Sources/Classes/DataLoading/Cursors/StaticCursor.swift

65 lines
2.1 KiB
Swift

//
// Copyright (c) 2017 Touch Instinct
//
// 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 RxSwift
/// Stub cursor implementation for array content type
public class StaticCursor<Element>: ResettableRxDataSourceCursor {
public typealias ResultType = [Element]
private let content: [Element]
/// Initializer for array content type
///
/// - Parameter content: array with elements of Element type
public init(content: [Element]) {
self.content = content
}
public required init(resetFrom other: StaticCursor) {
self.content = other.content
}
public private(set) var exhausted = false
public private(set) var count = 0
public subscript(index: Int) -> Element {
content[index]
}
public func loadNextBatch() -> Single<[Element]> {
Single.deferred {
if self.exhausted {
return .error(CursorError.exhausted)
}
self.count = self.content.count
self.exhausted = true
return .just(self.content)
}
}
}