import Foundation

class FMUserCredential: RLMObject {
    dynamic var accessToken :String = ""
    dynamic var refreshToken :String = ""
    
    // 代替案
    private struct ClassProperty {
        static var _realm:RLMRealm? = nil
    }
    
    // Computed Property
    class var _realm: RLMRealm? {
        get {
            return ClassProperty._realm
        }
        set {
            return ClassProperty._realm = newValue
        }
    }
    
    class func realm() -> RLMRealm {
        if (FMUserCredential._realm == nil) {
            let documentsPath = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0] as String
            let realmPath = documentsPath.stringByAppendingPathComponent("db25.realm")
            let realm = RLMRealm(path:realmPath, readOnly:false, error:nil)
            FMUserCredential._realm = realm
        }
        return FMUserCredential._realm!
    }
    
    class func findAll() -> RLMResults {
        return FMUserCredential.allObjectsInRealm(realm())
    }
    class func find() -> FMUserCredential? {
        if (findAll().count >= 1) {
            return findAll().firstObject() as FMUserCredential?
        }
        return nil
    }
}

let realm = RLMRealm.inMemoryRealmWithIdentifier("MyInMemoryRealm")
FMUserCredential._realm = realm