Value Transformer

IsNotEmpty.swift

class IsNotEmpty: ValueTransformer {
    
    override class func transformedValueClass() -> Swift.AnyClass {
        return Int.self as! AnyClass
    }
    
    override class func allowsReverseTransformation() -> Bool {
        return false
    }
    
    override func transformedValue(_ value: Any?) -> Any? {
        guard let value = value as? Int else {
            return false
        }
        return value > 0
    }
    
}