public static IEnumerable <ZenjectResolveException> ValidateContract(
DiContainer container, Type contractType, ResolveContext context, bool isOptional)
{
var matches = container.GetProviderMatches(contractType, context);
if (matches.IsLength(1))
{
foreach (var error in matches.Single().ValidateBinding())
{
yield return(error);
}
}
else
{
if (ReflectionUtil.IsGenericList(contractType))
{
var subType = contractType.GetGenericArguments().Single();
matches = container.GetProviderMatches(subType, context);
if (matches.IsEmpty())
{
if (!isOptional)
{
yield return(new ZenjectResolveException(
"Could not find dependency with type 'List<{0}>' when injecting into '{1}. If the empty list is also valid, you can allow this by using the [InjectOptional] attribute.' \nObject graph:\n{2}"
.With(subType.Name(), context.EnclosingType.Name(), container.GetCurrentObjectGraph())));
}
}
else
{
foreach (var match in matches)
{
foreach (var error in match.ValidateBinding())
{
yield return(error);
}
}
}
}
else
{
if (!isOptional)
{
if (matches.IsEmpty())
{
yield return(new ZenjectResolveException(
"Could not find required dependency with type '{0}' when injecting into '{1}' \nObject graph:\n{2}"
.With(contractType.Name(), context.EnclosingType.Name(), container.GetCurrentObjectGraph())));
}
else
{
yield return(new ZenjectResolveException(
"Found multiple matches when only one was expected for dependency with type '{0}' when injecting into '{1}' \nObject graph:\n{2}"
.With(contractType.Name(), context.EnclosingType.Name(), container.GetCurrentObjectGraph())));
}
}
}
}
}
