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102 lines
4.6 KiB
102 lines
4.6 KiB
--===========================================================================--
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-- --
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-- System.Reactive.Observer --
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-- --
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--===========================================================================--
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--===========================================================================--
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-- Author : kurapica125@outlook.com --
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-- URL : http://github.com/kurapica/PLoop --
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-- Create Date : 2019/12/01 --
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-- Update Date : 2019/12/01 --
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-- Version : 1.0.0 --
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--===========================================================================--
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PLoop(function(_ENV)
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namespace "System.Reactive"
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__Sealed__() class "Observer" (function(_ENV)
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extend "System.IObserver"
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-----------------------------------------------------------------------
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-- abstract method --
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-----------------------------------------------------------------------
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--- Provides the observer with new data
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__Abstract__() function OnNextCore(value) end
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--- Notifies the observer that the provider has experienced an error condition
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__Abstract__() function OnErrorCore(exception) end
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--- Notifies the observer that the provider has finished sending push-based notifications
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__Abstract__() function OnCompletedCore() end
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-----------------------------------------------------------------------
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-- method --
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-----------------------------------------------------------------------
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--- Provides the observer with new data
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function OnNext(self, ...)
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if self.IsUnsubscribed then return end
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return self.OnNextCore(...)
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end
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--- Notifies the observer that the provider has experienced an error condition
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function OnError(self, exception)
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if self.IsUnsubscribed then return end
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self.IsUnsubscribed = true
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return self.OnErrorCore(exception)
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end
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--- Notifies the observer that the provider has finished sending push-based notifications
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function OnCompleted(self)
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if self.IsUnsubscribed then return end
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self.IsUnsubscribed = true
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return self.OnCompletedCore()
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end
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-----------------------------------------------------------------------
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-- constructor --
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-----------------------------------------------------------------------
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__Arguments__{ Callable/nil, Callable/nil, Callable/nil }
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function __ctor(self, onNext, onError, onCompleted)
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self.OnNextCore = onNext
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self.OnErrorCore = onError
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self.OnCompletedCore= onCompleted
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end
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end)
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-- Declare first
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class "Observable" (function(_ENV)
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extend "System.IObservable"
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export { Observer }
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-----------------------------------------------------------------------
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-- abstract method --
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-----------------------------------------------------------------------
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__Abstract__() function SubscribeCore(observer) end
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-----------------------------------------------------------------------
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-- method --
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-----------------------------------------------------------------------
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local function subscribe(self, observer)
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self.SubscribeCore(observer)
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return observer
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end
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__Arguments__{ IObserver }
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Subscribe = subscribe
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__Arguments__{ Callable/nil, Callable/nil, Callable/nil }
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function Subscribe(self, onNext, onError, onCompleted)
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return subscribe(self, Observer(onNext, onError, onCompleted))
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end
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-----------------------------------------------------------------------
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-- constructor --
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-----------------------------------------------------------------------
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__Arguments__{ Callable }
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function __ctor(self, subscribe)
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self.SubscribeCore = subscribe
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end
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end)
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end)
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