/// <summary>
/// Creates a value converter for <see cref="IValidatableEnum{TKey}"/>.
/// </summary>
/// <param name="type">Type of the value object/enum.</param>
/// <param name="validateOnWrite">In case of an <see cref="IValidatableEnum{TKey}"/>, ensures that the item is valid before writing it to database.</param>
/// <returns>An instance of <see cref="ValueConverter"/>></returns>
public static ValueConverter Create(Type type, bool validateOnWrite)
{
if (type is null)
{
throw new ArgumentNullException(nameof(type));
}
var metadata = ValueObjectMetadataLookup.Find(type);
if (metadata is null)
{
throw new ArgumentException($"The provided type '{type.Name}' is neither an Smart Enum nor a Value Object with a key member.");
}
object converter;
if (metadata.IsValidatableEnum)
{
var enumConverterType = typeof(ValidatableEnumValueConverter <,>).MakeGenericType(metadata.Type, metadata.KeyType);
converter = Activator.CreateInstance(enumConverterType, new object[] { validateOnWrite }) ?? throw new Exception($"Could not create an instance of '{enumConverterType.Name}'.");
}
else
{
var converterType = typeof(ValueObjectValueConverter <,>).MakeGenericType(metadata.Type, metadata.KeyType);
converter = Activator.CreateInstance(converterType) ?? throw new Exception($"Could not create an instance of '{converterType.Name}'.");
}
return((ValueConverter)converter);
}
private static void AddConverterForScalarProperties(
IMutableEntityType entity,
bool validateOnWrite,
Dictionary <Type, ValueConverter> converterLookup,
Action <IMutableProperty> configure)
{
foreach (var property in entity.GetProperties())
{
var valueConverter = property.GetValueConverter();
if (valueConverter is not null)
{
continue;
}
var propertyType = property.ClrType;
if (ValueObjectMetadataLookup.Find(propertyType) is null)
{
continue;
}
SetConverterAndExecuteCallback(validateOnWrite, converterLookup, configure, property);
}
}
private static void AddConvertersForNavigations(
IMutableEntityType entity,
ModelBuilder modelBuilder,
bool validateOnWrite,
Dictionary <Type, ValueConverter> converterLookup,
Action <IMutableProperty> configure)
{
List <IMutableNavigation>?navigationsToConvert = null;
foreach (var navigation in entity.GetNavigations())
{
if (ValueObjectMetadataLookup.Find(navigation.ClrType) is not null)
{
(navigationsToConvert ??= new List <IMutableNavigation>()).Add(navigation);
}
}
if (navigationsToConvert is null)
{
return;
}
var builders = modelBuilder.FindEntityBuilder(entity);
foreach (var navigation in navigationsToConvert)
{
var property = FindPropertyBuilder(builders, entity, navigation.Name);
SetConverterAndExecuteCallback(validateOnWrite, converterLookup, configure, property.Metadata);
}
}
/// <inheritdoc />
public IModelBinder?GetBinder(ModelBinderProviderContext context)
{
if (context is null)
{
throw new ArgumentNullException(nameof(context));
}
// Skip model binding from body so BodyModelBinder incl. JSON serialization takes over
if (SkipModelBinding(context))
{
return(null);
}
var metadata = ValueObjectMetadataLookup.Find(context.Metadata.ModelType);
if (metadata is null)
{
return(null);
}
var loggerFactory = context.Services.GetRequiredService <ILoggerFactory>();
var modelBinderType = typeof(ValueObjectModelBinder <,>).MakeGenericType(metadata.Type, metadata.KeyType);
var modelBinder = Activator.CreateInstance(modelBinderType, loggerFactory, metadata.Validate) ?? throw new Exception($"Could not create an instance of type '{modelBinderType.Name}'.");
return((IModelBinder)modelBinder);
}
private static Expression <Func <T, TKey> > GetConverterToKey <T, TKey>()
{
var metadata = ValueObjectMetadataLookup.Find(typeof(T));
if (metadata is null)
{
throw new InvalidOperationException($"No metadata for provided type '{typeof(T).Name}' found.");
}
return((Expression <Func <T, TKey> >)metadata.ConvertToKeyExpression);
}
private void ProcessProperty(IConventionProperty property)
{
var valueConverter = property.GetValueConverter();
if (valueConverter is not null)
{
return;
}
if (ValueObjectMetadataLookup.Find(property.ClrType) is null)
{
return;
}
SetConverterAndExecuteCallback(property);
}
private void AddSmartEnumAndKeyedValueObjects(IConventionEntityTypeBuilder entityTypeBuilder)
{
var entity = entityTypeBuilder.Metadata;
foreach (var propertyInfo in entity.ClrType.GetRuntimeProperties())
{
var navigation = entity.FindNavigation(propertyInfo);
if (navigation is not null)
{
ProcessNavigation(navigation);
continue;
}
var property = entity.FindProperty(propertyInfo);
if (property is not null)
{
ProcessProperty(property);
continue;
}
if (!propertyInfo.IsCandidateProperty())
{
continue;
}
var propertyType = propertyInfo.PropertyType;
var metadata = ValueObjectMetadataLookup.Find(propertyType);
if (metadata is null)
{
continue;
}
property = entity.AddProperty(propertyInfo);
if (property is not null)
{
SetConverterAndExecuteCallback(property);
}
}
}
private void ProcessNavigation(IConventionNavigation navigation)
{
var naviType = navigation.ClrType;
if (ValueObjectMetadataLookup.Find(naviType) is null)
{
return;
}
var property = navigation.DeclaringEntityType.Builder
.Property(naviType, navigation.Name)?
.Metadata;
if (property is null)
{
return;
}
SetConverterAndExecuteCallback(property);
}
private static void AddSmartEnumAndKeyedValueObjects(
bool validateOnWrite,
Dictionary <Type, ValueConverter> converterLookup,
Action <IMutableProperty> configure,
IMutableEntityType entity)
{
foreach (var propertyInfo in entity.ClrType.GetRuntimeProperties())
{
// will be handled by "AddConvertersForNavigations"
if (entity.FindNavigation(propertyInfo) is not null)
{
continue;
}
// wil be handled by AddConverterForScalarProperties
if (entity.FindProperty(propertyInfo) is not null)
{
continue;
}
if (!propertyInfo.IsCandidateProperty())
{
continue;
}
var propertyType = propertyInfo.PropertyType;
var metadata = ValueObjectMetadataLookup.Find(propertyType);
if (metadata is null)
{
continue;
}
var property = entity.AddProperty(propertyInfo);
SetConverterAndExecuteCallback(validateOnWrite, converterLookup, configure, property);
}
}
/// <inheritdoc />
public override JsonConverter CreateConverter(Type typeToConvert, JsonSerializerOptions options)
{
if (typeToConvert is null)
{
throw new ArgumentNullException(nameof(typeToConvert));
}
if (options is null)
{
throw new ArgumentNullException(nameof(options));
}
var metadata = ValueObjectMetadataLookup.Find(typeToConvert);
if (metadata is null)
{
throw new InvalidOperationException($"No metadata for provided type '{typeToConvert.Name}' found.");
}
var converterType = typeof(ValueObjectJsonConverter <,>).MakeGenericType(metadata.Type, metadata.KeyType);
var converter = Activator.CreateInstance(converterType, metadata.ConvertFromKey, metadata.ConvertToKey, options)
?? throw new Exception($"Could not create converter of type '{converterType.Name}'.");
return((JsonConverter)converter);
}
static Cache()
{
var type = typeof(T);
var metadata = ValueObjectMetadataLookup.Find(type);
if (metadata is null)
{
return;
}
var formatterGenericTypeDefinition = Nullable.GetUnderlyingType(type) == metadata.Type
? typeof(NullableStructValueObjectMessagePackFormatter <,>)
: typeof(ValueObjectMessagePackFormatter <,>);
var formatterType = formatterGenericTypeDefinition.MakeGenericType(metadata.Type, metadata.KeyType);
var formatter = Activator.CreateInstance(formatterType, metadata.ConvertFromKey, metadata.ConvertToKey);
if (formatter is null)
{
InitError = $"The formatter of '{formatterType.Name}' could not be instantiated.";
return;
}
Formatter = (IMessagePackFormatter <T>)formatter;
}
/// <inheritdoc />
public override bool CanConvert(Type typeToConvert)
{
return(ValueObjectMetadataLookup.Find(typeToConvert) is not null);
}