private IServiceCallSite[] CreateArgumentCallSites(
Type serviceType,
Type implementationType,
CallSiteChain callSiteChain,
ParameterInfo[] parameters,
bool throwIfCallSiteNotFound)
{
var parameterCallSites = new IServiceCallSite[parameters.Length];
for (var index = 0; index < parameters.Length; index++)
{
var callSite = CreateCallSite(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 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");
}
return(ApplyLifetime(callSite, descriptor, descriptor.Lifetime));
}
return(null);
}
protected override Expression VisitConstant(ConstantCallSite constantCallSite, ILEmitResolverBuilderContext argument)
{
AddConstant(argument, constantCallSite.DefaultValue);
return null;
}
protected override object VisitConstant(ConstantCallSite constantCallSite, ServiceProviderEngineScope scope)
{
return(constantCallSite.DefaultValue);
}
protected override ILEmitCallSiteAnalysisResult VisitConstant(ConstantCallSite constantCallSite, object argument) => new ILEmitCallSiteAnalysisResult(ConstantILSize);
protected override object VisitConstant(ConstantCallSite constantCallSite, CallSiteFormatterContext argument)
{
argument.WriteProperty("value", constantCallSite.DefaultValue ?? "");
return(null);
}
protected override Expression VisitConstant(ConstantCallSite constantCallSite, CallSiteExpressionBuilderContext context)
{
return(Expression.Constant(constantCallSite.DefaultValue));
}
protected abstract TResult VisitConstant(ConstantCallSite constantCallSite, TArgument argument);
protected override Expression BuildConstant(ConstantCallSite callSite)
{
return(Expression.Constant(callSite.DefaultValue));
}
protected abstract TResult BuildConstant(ConstantCallSite constantCallSite);
protected override Type VisitConstant(ConstantCallSite constantCallSite, CallSiteValidatorState state) => null;
protected override object BuildConstant(ConstantCallSite constantCallSite)
{
return(constantCallSite.DefaultValue);
}
