private ServiceCallSite[] CreateArgumentCallSites(
Type serviceType,
Type implementationType,
CallSiteChain callSiteChain,
ParameterInfo[] parameters,
bool throwIfCallSiteNotFound)
{
var parameterCallSites = new ServiceCallSite[parameters.Length];
for (var index = 0; index < parameters.Length; index++)
{
var callSite = GetCallSite(parameters[index].ParameterType, callSiteChain);
if (callSite == null && ParameterDefaultValue.TryGetDefaultValue(parameters[index], out var defaultValue))
{
callSite = new ConstantCallSite(serviceType, defaultValue);
}
if (callSite == null)
{
if (throwIfCallSiteNotFound)
{
throw new InvalidOperationException(/*Resources.FormatCannotResolveService(
* parameters[index].ParameterType,
* implementationType)*/);
}
return(null);
}
parameterCallSites[index] = callSite;
}
return(parameterCallSites);
}
private ServiceCallSite TryCreateExact(ServiceDescriptor descriptor, Type serviceType, CallSiteChain callSiteChain, int slot)
{
if (serviceType == descriptor.ServiceType)
{
ServiceCallSite callSite;
var lifetime = new ResultCache(descriptor.Lifetime, serviceType, slot);
if (descriptor.ImplementationInstance != null)
{
callSite = new ConstantCallSite(descriptor.ServiceType, descriptor.ImplementationInstance);
}
else if (descriptor.ImplementationFactory != null)
{
callSite = new FactoryCallSite(lifetime, descriptor.ServiceType, descriptor.ImplementationFactory);
}
else if (descriptor.ImplementationType != null)
{
callSite = CreateConstructorCallSite(lifetime, descriptor.ServiceType, descriptor.ImplementationType, callSiteChain);
}
else
{
throw new InvalidOperationException("Invalid service descriptor");
}
return(callSite);
}
return(null);
}
protected override Type VisitConstant(ConstantCallSite constantCallSite, CallSiteValidatorState state) => null;
protected override object VisitConstant(ConstantCallSite constantCallSite, RuntimeResolverContext context)
{
return(constantCallSite.DefaultValue);
}
protected abstract TResult VisitConstant(ConstantCallSite constantCallSite, TArgument argument);