//TODO: Implement full caching to remember injectable fields for certain types.
public void Inject()
{
try
{
//TODO: Check if autofac performance better than this.
//TODO: Implement FreecraftCore injection lambdas
foreach (MemberInfo mi in ObjectType.FieldsAndPropertiesWith(Flags.InstanceAnyVisibility, typeof(InjectAttribute)))
{
//Skip if the field/prop is marked with OnlyIfNull but is not null.
if (mi.Attribute <InjectOnlyIfNullAttribute>() != null)
{
if (mi.Get(ObjectInstance) != null)
{
continue;
}
}
//Based on FreecraftCore's: https://github.com/FreecraftCore/FreecraftCore.Serializer/blob/152fda27c46fcfcaa72d3568c1a591d728773f33/src/FreecraftCore.Serializer.API/Reflection/Serialization/MemberSerializationMediator.cs
if (mi is PropertyInfo && !((PropertyInfo)mi).CanWrite)
{
//TODO: Unity2018 has issues with this FasterFlect PlatformNotSupportedException: Operation is not supported on this platform.
//If it's a property and it's a readonly one we'll try to grab the backing field
//ObjectInstance.SetFieldValue($"<{mi.Name}>k__BackingField", Resolver.Resolve(mi.Type()));
FieldInfo field = ObjectType.GetField($"<{mi.Name}>k__BackingField", BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.GetField);
if (field == null)
{
throw new InvalidOperationException($"Unable to get backing field for {mi.Name}");
}
field.SetValue(ObjectInstance, Resolver.Resolve(mi.Type()), BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.SetField, null, CultureInfo.CurrentCulture);
//ObjectInstance.SetFieldValue($"<{mi.Name}>k__BackingField", Resolver.Resolve(mi.Type()));
}
else
{
//TODO: Unity2018 has issues with this FasterFlect PlatformNotSupportedException: Operation is not supported on this platform.
//mi.Set(ObjectInstance, Resolver.Resolve(mi.Type()));
if (mi is PropertyInfo p)
{
p.SetValue(ObjectInstance, Resolver.Resolve(mi.Type()));
}
else if (mi is FieldInfo f)
{
f.SetValue(ObjectInstance, Resolver.Resolve(mi.Type()));
}
}
}
//If we didn't fail we should invoke the dependency injection callbacks
//if the object implemented them
if (this.ObjectInstance is IDependencyInjectionCallbackable dpc)
{
dpc.OnDependencyInjectionFinished();
}
}
catch (Exception e)
{
throw new InvalidOperationException($"Error: {e.Message} failed to inject for {ObjectType} on instance: {ObjectInstance}", e);
}
}