private IServiceCallSite TryCreateExact(ServiceDescriptor descriptor, Type serviceType, CallSiteChain callSiteChain)
{
if (serviceType == descriptor.ServiceType)
{
IServiceCallSite callSite;
if (descriptor.ImplementationInstance != null)
{
callSite = new ConstantCallSite(descriptor.ServiceType, descriptor.ImplementationInstance);
}
else if (descriptor.ImplementationFactory != null)
{
callSite = new FactoryCallSite(descriptor.ServiceType, descriptor.ImplementationFactory);
}
else if (descriptor.ImplementationType != null)
{
callSite = CreateConstructorCallSite(descriptor.ServiceType, descriptor.ImplementationType, callSiteChain);
}
else
{
throw new InvalidOperationException("Invalid service descriptor");
}
callSite = new InterceptionCallSite(_interceptingProxyFactory, callSite);
return(ApplyLifetime(callSite, descriptor, descriptor.Lifetime));
}
return(null);
}
private IServiceCallSite TryCreateOpenGeneric(ServiceDescriptor descriptor, Type serviceType, CallSiteChain callSiteChain)
{
if (serviceType.IsConstructedGenericType &&
serviceType.GetGenericTypeDefinition() == descriptor.ServiceType)
{
Debug.Assert(descriptor.ImplementationType != null, "descriptor.ImplementationType != null");
var closedType = descriptor.ImplementationType.MakeGenericType(serviceType.GenericTypeArguments);
var constructorCallSite = CreateConstructorCallSite(serviceType, closedType, callSiteChain);
var callSite = new InterceptionCallSite(_interceptingProxyFactory, constructorCallSite);
return(ApplyLifetime(callSite, Tuple.Create(descriptor, serviceType), descriptor.Lifetime));
}
return(null);
}
protected override object VisitInterception(InterceptionCallSite interceptionCallSite, ServiceProvider2 provider)
{
if (interceptionCallSite.ServiceType.IsInterface)
{
var target = this.VisitCallSite(interceptionCallSite.TargetCallSite, provider);
return(interceptionCallSite.ProxyFactory.Wrap(interceptionCallSite.ServiceType, target));
}
if (interceptionCallSite.TargetCallSite is ConstructorCallSite || interceptionCallSite.TargetCallSite is CreateInstanceCallSite)
{
return(interceptionCallSite.ProxyFactory.Create(interceptionCallSite.ImplementationType ?? interceptionCallSite.ServiceType, provider, () => VisitCallSite(interceptionCallSite.TargetCallSite, provider)));
}
return(this.VisitCallSite(interceptionCallSite.TargetCallSite, provider));
}
protected override object VisitInterception(InterceptionCallSite interceptionCallSite, ServiceProviderEngineScope scope)
{
if (interceptionCallSite.ServiceType.IsInterface)
{
var target = VisitCallSite(interceptionCallSite.TargetCallSite, scope);
return(interceptionCallSite.ProxyFactory.Wrap(interceptionCallSite.ServiceType, target));
}
if (interceptionCallSite.CanIntercept && (interceptionCallSite.TargetCallSite is ConstructorCallSite || interceptionCallSite.TargetCallSite is CreateInstanceCallSite))
{
return(interceptionCallSite.ProxyFactory.Create(interceptionCallSite.ImplementationType ?? interceptionCallSite.ServiceType, scope, () => VisitCallSite(interceptionCallSite.TargetCallSite, scope)));
}
return(VisitCallSite(interceptionCallSite.TargetCallSite, scope));
}
protected override Expression VisitInterception(InterceptionCallSite interceptionCallSite, CallSiteExpressionBuilderContext argument)
{
if (interceptionCallSite.ServiceType.IsInterface)
{
var type = Expression.Constant(interceptionCallSite.ServiceType);
var target = VisitCallSite(interceptionCallSite.TargetCallSite, argument);
var proxyFactory = Expression.Constant(interceptionCallSite.ProxyFactory, typeof(IInterceptingProxyFactory));
return(Expression.Call(proxyFactory, WrapMethodInfo, type, target));
}
if (interceptionCallSite.CanIntercept && (interceptionCallSite.TargetCallSite is ConstructorCallSite || interceptionCallSite.TargetCallSite is CreateInstanceCallSite))
{
var proxyFactory = Expression.Constant(interceptionCallSite.ProxyFactory, typeof(IInterceptingProxyFactory));
var type = Expression.Constant(interceptionCallSite.ImplementationType ?? interceptionCallSite.ServiceType);
var targetAccessor = Expression.Lambda <Func <object> >(VisitCallSite(interceptionCallSite.TargetCallSite, argument));
return(Expression.Call(proxyFactory, CreateMethodInfo, type, argument.ScopeParameter, targetAccessor));
}
return(VisitCallSite(interceptionCallSite.TargetCallSite, argument));
}
protected override Expression VisitInterception(InterceptionCallSite interceptionCallSite, ParameterExpression provider)
{
if (interceptionCallSite.ServiceType.IsInterface)
{
var instance = Expression.Constant(interceptionCallSite.ProxyFactory, typeof(IInterceptingProxyFactory));
var parameterOfServiceType = Expression.Constant(interceptionCallSite.ServiceType);
var parameterOfTarget = this.VisitCallSite(interceptionCallSite.TargetCallSite, provider);
return(Expression.Call(instance, WrapMethodInfo, parameterOfServiceType, parameterOfTarget));
}
else if (interceptionCallSite.TargetCallSite is ConstructorCallSite || interceptionCallSite.TargetCallSite is CreateInstanceCallSite)
{
var instance = Expression.Constant(interceptionCallSite.ProxyFactory, typeof(IInterceptingProxyFactory));
var parameterOfServiceType = Expression.Constant(interceptionCallSite.ImplementationType ?? interceptionCallSite.ServiceType);
var targetAccessor = Expression.Lambda <Func <object> >(this.VisitCallSite(interceptionCallSite.TargetCallSite, provider));
return(Expression.Call(instance, CreateMethodInfo, parameterOfServiceType, provider, targetAccessor));
}
else
{
return(this.VisitCallSite(interceptionCallSite.TargetCallSite, provider));
}
}
protected abstract TResult VisitInterception(InterceptionCallSite interceptionCallSite, TArgument argument);
protected override Type VisitInterception(InterceptionCallSite interceptionCallSite, CallSiteValidatorState argument) => null;
