public override void PreBuildUp(IBuilderContext context)
{
Guard.ArgumentNotNull(context, "context");
if (!this.CanIntercept(context))
{
return;
}
IInstanceInterceptionPolicy interceptionPolicy = FindInterceptionPolicy <IInstanceInterceptionPolicy>(context, true);
if (null == interceptionPolicy)
{
IInstanceInterceptor interceptor = context.NewBuildUp <IInterceptor>(typeof(IInterceptor).AssemblyQualifiedName) as IInstanceInterceptor;
if (null == interceptor)
{
return;
}
if (!interceptor.CanIntercept(context.BuildKey.Type))
{
return;
}
context.Policies.Set <IInstanceInterceptionPolicy>(new FixedInstanceInterceptionPolicy(interceptor), context.BuildKey);
context.Policies.Clear <ITypeInterceptionPolicy>(context.BuildKey);
}
IInterceptionBehaviorsPolicy interceptionBehaviorsPolicy = FindInterceptionPolicy <IInterceptionBehaviorsPolicy>(context, true);
if (null == interceptionBehaviorsPolicy)
{
var policyInjectionBehavior = new InterceptionBehavior <PolicyInjectionBehavior>();
policyInjectionBehavior.AddPolicies(context.OriginalBuildKey.Type, context.BuildKey.Type, context.BuildKey.Name, context.Policies);
}
}
public override void PostBuildUp(IBuilderContext context)
{
Microsoft.Practices.Unity.Utility.Guard.ArgumentNotNull(context, "context");
// If it's already been intercepted, don't do it again.
if (context.Existing is IInterceptingProxy)
{
return;
}
IInstanceInterceptionPolicy interceptionPolicy =
FindInterceptionPolicy <IInstanceInterceptionPolicy>(context, true);
if (interceptionPolicy == null)
{
return;
}
var interceptor = interceptionPolicy.GetInterceptor(context);
IInterceptionBehaviorsPolicy interceptionBehaviorsPolicy =
FindInterceptionPolicy <IInterceptionBehaviorsPolicy>(context, true);
if (interceptionBehaviorsPolicy == null)
{
return;
}
IAdditionalInterfacesPolicy additionalInterfacesPolicy =
FindInterceptionPolicy <IAdditionalInterfacesPolicy>(context, false);
IEnumerable <Type> additionalInterfaces =
additionalInterfacesPolicy != null ? additionalInterfacesPolicy.AdditionalInterfaces : Type.EmptyTypes;
Type typeToIntercept = context.OriginalBuildKey.Type;
Type implementationType = context.Existing.GetType();
IInterceptionBehavior[] interceptionBehaviors =
interceptionBehaviorsPolicy.GetEffectiveBehaviors(
context, interceptor, typeToIntercept, implementationType)
.ToArray();
if (interceptionBehaviors.Length > 0)
{
context.Existing =
Intercept.ThroughProxyWithAdditionalInterfaces(
typeToIntercept,
context.Existing,
interceptor,
interceptionBehaviors,
additionalInterfaces);
}
}
/// <summary>
/// Called during the chain of responsibility for a build operation. The
/// PostBuildUp method is called when the chain has finished the PreBuildUp
/// phase and executes in reverse order from the PreBuildUp calls.
/// </summary>
/// <param name="context">Context of the build operation.</param>
public override void PostBuildUp(IBuilderContext context)
{
// If it's already been intercepted, don't do it again.
if (context.Existing is IInterceptingProxy)
{
return;
}
Type originalType;
if (!BuildKey.TryGetType(context.OriginalBuildKey, out originalType))
{
return;
}
Type typeToIntercept;
IInstanceInterceptionPolicy interceptionPolicy = FindInterceptorPolicy(context, out typeToIntercept);
if (interceptionPolicy != null)
{
IInstanceInterceptor interceptor = interceptionPolicy.Interceptor;
if (interceptor.CanIntercept(typeToIntercept))
{
IUnityContainer container = BuilderContext.NewBuildUp <IUnityContainer>(context);
InjectionPolicy[] policies = BuilderContext.NewBuildUp <InjectionPolicy[]>(context);
PolicySet allPolicies = new PolicySet(policies);
IInterceptingProxy proxy = interceptor.CreateProxy(typeToIntercept, context.Existing);
bool hasHandlers = false;
foreach (MethodImplementationInfo method in interceptor.GetInterceptableMethods(typeToIntercept, context.Existing.GetType()))
{
HandlerPipeline pipeline = new HandlerPipeline(allPolicies.GetHandlersFor(method, container));
if (pipeline.Count > 0)
{
proxy.SetPipeline(interceptor.MethodInfoForPipeline(method), pipeline);
hasHandlers = true;
}
}
if (hasHandlers)
{
context.Existing = proxy;
}
}
}
}
