model-interceptors-selectors.md

Model Interceptors Selectors

Model interceptors selectors are types implementing IModelInterceptorsSelector interface. They provide custom logic that can modify default set of interceptors associated with the component.

⚠️ Breaking changes in Windsor 2.5: In Windsor 2.5 IModelInterceptorsSelector method's signatures and how it is used have changed.

IModelInterceptorsSelector interface

The IModelInterceptorsSelector interface exposes two methods:

HasInterceptors method

The method is invoked by the container to learn if given selector is interested in given component. It has the following signature:

bool HasInterceptors(ComponentModel model)

SelectInterceptors method

When using the selectors, Windsor will first invoke HasInterceptors for each of its selectors, and for these of them that return true it will invoke SelectInterceptors which performs the actual selection. The method has the following signature:

InterceptorReference[] SelectInterceptors(ComponentModel model, InterceptorReference[] interceptors)

The second argument contains the array of interceptor references returned by previous interceptor in the pipeline. The first interceptor, will receive the default set of interceptors from model.Interceptors collection. The selector usually will reorder passed interceptors, filter out some of them, or append some more to the collection.

Attaching selectors

Selectors are attached to ProxyFactory of the kernel, using the following method:

var selector = new MyInterceptorSelector();
container.Kernel.ProxyFactory.AddInterceptorSelector(selector);