public ConstructorCandidate(ServiceRepository repo, ConstructorInfo constructor, ConstructorParameter[] parameters)
{
_constructor = constructor;
_constructorParameters = _constructor.GetParameters();
var numConstructorParameters = _constructorParameters.Length;
if (numConstructorParameters < parameters.Length)
{
MatchScore = -1;
return;
}
int resolvedServicesCount = 0;
int resolvedParametersCount = 0;
_parameterValues = new ConstructorParameter[numConstructorParameters];
for (int i = 0; i < _parameterValues.Length; i++)
{
var parameterType = _constructorParameters[i].ParameterType;
if (repo.CanResolve(parameterType) || parameterType.IsFactoryValue())
{
_parameterValues[i] = new ConstructorParameter(() => repo.Get(parameterType));
resolvedServicesCount++;
}
}
if (parameters.Length > 0)
{
var typedParameters = parameters.Where(p => p.Name == null && p.Type != null).ToList();
var numNullParameters = parameters.Count(p => p.Name == null && p.Type == null);
var namedParameters = parameters.Where(p => p.Name != null).ToDictionary(p => p.Name, p => p);
for (int i = 0; i < numConstructorParameters; i++)
{
if (_parameterValues[i] != null)
{
continue;
}
var constructorParameter = _constructorParameters[i];
var constructorParameterType = constructorParameter.ParameterType;
if (namedParameters.TryGetValue(constructorParameter.Name, out var namedParameter))
{
if (!namedParameter.Type.IsAssignableTo(constructorParameterType))
{
throw new Exception($"Parameter {namedParameter.Name} can't be assigned to type {constructorParameterType.Name}");
}
_parameterValues[i] = namedParameter;
resolvedParametersCount++;
}
else
{
foreach (var parameter in typedParameters.Where(p => p.Type.IsAssignableTo(constructorParameterType)))
{
_parameterValues[i] = parameter;
resolvedParametersCount++;
typedParameters.Remove(parameter);
break;
}
if (_parameterValues[i] == null && numNullParameters > 0 && constructorParameterType.CanBeNull())
{
_parameterValues[i] = new ConstructorParameter(value: null);
numNullParameters--;
resolvedParametersCount++;
}
}
}
if (resolvedParametersCount < parameters.Length)
{
MatchScore = -1;
return;
}
}
var resolveCount = resolvedParametersCount + resolvedServicesCount;
MatchScore = 100 * (100 + resolveCount - numConstructorParameters) + numConstructorParameters;
}
public ServiceRegistrationResult(ServiceRepository repo, ServiceDefinition svc)
{
_repository = repo;
_svc = svc;
}