private ConstructorInfo SelectConstructor(
Type typeToConstruct,
RegistrationContext registrationContext,
ResolutionContext resolutionContext,
IEnumerable <ConstructorInfo> constructorsEnumerable,
out Expression[] parameterExpressions)
{
ConstructorInfo[] constructors = null;
if (resolutionContext.ParameterExpressions.Length > 0)
{
var containingFactoryParameter = constructorsEnumerable
.Where(c => c.GetParameters()
.Any(p => resolutionContext.ParameterExpressions
.WhereOrDefault(pe => pe.Any(pexp => pexp.I2.Type == p.ParameterType ||
pexp.I2.Type.Implements(p.ParameterType)))?.Any() ?? false));
var everythingElse = constructorsEnumerable.Except(containingFactoryParameter);
constructors = containingFactoryParameter.Concat(everythingElse).CastToArray();
}
else
{
constructors = constructorsEnumerable.CastToArray();
}
if (constructors.Length == 0)
{
throw new ResolutionFailedException(typeToConstruct,
registrationContext.Name,
"No public constructor found. Make sure there is at least one public constructor on the type.");
}
var checkedConstructors = new Dictionary <MethodBase, TypeInformation>();
var unknownTypeCheckDisabledContext = resolutionContext.CurrentContainerContext.ContainerConfiguration.UnknownTypeResolutionEnabled
? resolutionContext.BeginUnknownTypeCheckDisabledContext()
: resolutionContext;
var length = constructors.Length;
for (var i = 0; i < length; i++)
{
var constructor = constructors[i];
if (TryBuildMethod(constructor, registrationContext, unknownTypeCheckDisabledContext,
out var failedParameter, out parameterExpressions))
{
return(constructor);
}
checkedConstructors.Add(constructor, failedParameter);
}
if (resolutionContext.CurrentContainerContext.ContainerConfiguration.UnknownTypeResolutionEnabled)
{
for (var i = 0; i < length; i++)
{
var constructor = constructors[i];
if (TryBuildMethod(constructor, registrationContext, resolutionContext, out _, out parameterExpressions))
{
return(constructor);
}
}
}
if (resolutionContext.NullResultAllowed)
{
parameterExpressions = null;
return(null);
}
var stringBuilder = new StringBuilder();
foreach (var checkedConstructor in checkedConstructors)
{
stringBuilder.AppendLine($"Constructor {checkedConstructor.Key} found with unresolvable parameter: ({checkedConstructor.Value.Type.FullName}){checkedConstructor.Value.ParameterOrMemberName}.");
}
throw new ResolutionFailedException(typeToConstruct, registrationContext.Name, stringBuilder.ToString());
}