如何确定组件是否可以从IHandlersFilter实现中解析 [英] How to determine if a component is resolvable from an IHandlersFilter implementation

问题描述

我正在尝试编写Castle Windsor v3 IHandlersFilter实现，该实现将滤除无法解决的处理程序。这是为了有选择地还原ResolveAll（如何在Castle 3中恢复为旧的CollectionResolver行为？）

I am trying to write a Castle Windsor v3 IHandlersFilter implementation that will filter out handlers that cannot be resolved. This is in an effort to optionally restore the old (pre-castle 3) behavior of ResolveAll (How to revert to old CollectionResolver behavior in Castle 3?)

我的问题是，从SelectHandlers方法中，什么是确定哪些输入IHandler是可解析的最佳方法（如果有）？我已经使用IHandler.CanResolve方法进行了实验，但是它所使用的参数比我通常处理的要先进一些，因此我不确定如何正确使用该方法。

My question is, from the SelectHandlers method, what is the best way (if any) to determine which of the input IHandlers are resolvable? I have experimented with the IHandler.CanResolve method, but it takes parameters that are a bit more advanced than I typically deal with, so I'm not sure how to use the method properly.

推荐答案

您可以检查 handler.CurrentState == HandlerState.Valid

但是请注意，这是基于Windsor可以静态确定的，因此，答案可能并不总是100％准确（例如，某些组件可能具有动态依赖关系，因此它们在此处显示为无法解决，但是您可以在尝试时成功解决这些问题。）

However be aware this is based on what Windsor can determine statically, therefore the answer may not always be 100% accurate (for example some components may have dynamic dependencies, so they will appear as unresolvable here, yet you'll be able to successfully resolve them when you try).

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