public void GetGraphTypeFromType_Matrix(Type type, bool nullable, TypeMappingMode typeMappingMode, Type expectedType)
{
if (expectedType == null)
{
Should.Throw <ArgumentOutOfRangeException>(() => type.GetGraphTypeFromType(nullable, typeMappingMode));
}
else
{
type.GetGraphTypeFromType(nullable, typeMappingMode).ShouldBe(expectedType);
}
}
/// <summary>
/// Gets the graph type for the indicated type.
/// </summary>
/// <param name="type">The type for which a graph type is desired.</param>
/// <param name="isNullable">if set to <c>false</c> if the type explicitly non-nullable.</param>
/// <param name="mode">Mode to use when mapping CLR type to GraphType.</param>
/// <returns>A Type object representing a GraphType that matches the indicated type.</returns>
/// <remarks>This can handle arrays, lists and other collections implementing IEnumerable.</remarks>
public static Type GetGraphTypeFromType(this Type type, bool isNullable = false, TypeMappingMode mode = TypeMappingMode.UseBuiltInScalarMappings)
{
while (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(IDataLoaderResult <>))
{
type = type.GetGenericArguments()[0];
}
if (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(Nullable <>))
{
type = type.GetGenericArguments()[0];
if (isNullable == false)
{
throw new ArgumentOutOfRangeException(nameof(isNullable),
$"Explicitly nullable type: Nullable<{type.Name}> cannot be coerced to a non nullable GraphQL type.");
}
}
Type graphType = null;
if (type.IsArray)
{
var clrElementType = type.GetElementType();
var elementType = GetGraphTypeFromType(clrElementType, clrElementType.IsNullable(), mode); // isNullable from elementType, not from parent array
graphType = typeof(ListGraphType <>).MakeGenericType(elementType);
}
else if (IsAnIEnumerable(type))
{
var clrElementType = GetEnumerableElementType(type);
var elementType = GetGraphTypeFromType(clrElementType, clrElementType.IsNullable(), mode); // isNullable from elementType, not from parent container
graphType = typeof(ListGraphType <>).MakeGenericType(elementType);
}
else
{
var attr = type.GetCustomAttribute <GraphQLMetadataAttribute>();
if (attr != null)
{
if (mode == TypeMappingMode.InputType)
{
graphType = attr.InputType;
}
else if (mode == TypeMappingMode.OutputType)
{
graphType = attr.OutputType;
}
else if (attr.InputType == attr.OutputType) // scalar
{
graphType = attr.InputType;
}
}
if (graphType == null)
{
if (mode == TypeMappingMode.UseBuiltInScalarMappings || !GlobalSwitches.UseRuntimeTypeMappings)
{
SchemaTypes.BuiltInScalarMappings.TryGetValue(type, out graphType);
}
else if (!type.IsEnum)
{
graphType = (mode == TypeMappingMode.OutputType ? typeof(GraphQLClrOutputTypeReference <>) : typeof(GraphQLClrInputTypeReference <>)).MakeGenericType(type);
}
}
}
if (graphType == null)
{
if (type.IsEnum)
{
graphType = typeof(EnumerationGraphType <>).MakeGenericType(type);
}
else
{
throw new ArgumentOutOfRangeException(nameof(type), $"The CLR type '{type.FullName}' cannot be coerced effectively to a GraphQL type.");
}
}
if (!isNullable)
{
graphType = typeof(NonNullGraphType <>).MakeGenericType(graphType);
}
return(graphType);
}
/// <summary>
/// Gets the graph type for the indicated type.
/// </summary>
/// <param name="type">The type for which a graph type is desired.</param>
/// <param name="isNullable">if set to <c>false</c> if the type explicitly non-nullable.</param>
/// <param name="mode">Mode to use when mapping CLR type to GraphType.</param>
/// <returns>A Type object representing a GraphType that matches the indicated type.</returns>
/// <remarks>This can handle arrays, lists and other collections implementing IEnumerable.</remarks>
public static Type GetGraphTypeFromType(this Type type, bool isNullable = false, TypeMappingMode mode = TypeMappingMode.UseBuiltInScalarMappings)
{
while (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(IDataLoaderResult <>))
{
type = type.GetGenericArguments()[0];
}
if (type == typeof(IDataLoaderResult))
{
type = typeof(object);
}
if (typeof(Task).IsAssignableFrom(type))
{
throw new ArgumentOutOfRangeException(nameof(type), "Task types cannot be coerced to a graph type; please unwrap the task type before calling this method.");
}
if (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(Nullable <>))
{
type = type.GetGenericArguments()[0];
if (!isNullable)
{
throw new ArgumentOutOfRangeException(nameof(isNullable),
$"Explicitly nullable type: Nullable<{type.Name}> cannot be coerced to a non nullable GraphQL type.");
}
}
Type?graphType = null;
if (type.IsArray)
{
var clrElementType = type.GetElementType() !;
var elementType = GetGraphTypeFromType(clrElementType, IsNullableType(clrElementType), mode); // isNullable from elementType, not from parent array
graphType = typeof(ListGraphType <>).MakeGenericType(elementType);
}
else if (IsAnIEnumerable(type))
{
var clrElementType = GetEnumerableElementType(type);
var elementType = GetGraphTypeFromType(clrElementType, IsNullableType(clrElementType), mode); // isNullable from elementType, not from parent container
graphType = typeof(ListGraphType <>).MakeGenericType(elementType);
}
else
{
#pragma warning disable CS0618 // Type or member is obsolete
var attr = type.GetCustomAttribute <GraphQLMetadataAttribute>();
if (attr != null)
{
if (mode == TypeMappingMode.InputType)
{
graphType = attr.InputType;
}
else if (mode == TypeMappingMode.OutputType)
{
graphType = attr.OutputType;
}
else if (attr.InputType == attr.OutputType) // scalar
{
graphType = attr.InputType;
}
}
#pragma warning restore CS0618 // Type or member is obsolete
if (mode == TypeMappingMode.InputType)
{
var inputAttr = type.GetCustomAttribute <InputTypeAttribute>();
if (inputAttr != null)
{
graphType = inputAttr.InputType;
}
}
else if (mode == TypeMappingMode.OutputType)
{
var outputAttr = type.GetCustomAttribute <OutputTypeAttribute>();
if (outputAttr != null)
{
graphType = outputAttr.OutputType;
}
}
if (graphType == null)
{
if (mode == TypeMappingMode.UseBuiltInScalarMappings)
{
if (!SchemaTypes.BuiltInScalarMappings.TryGetValue(type, out graphType))
{
if (type.IsEnum)
{
graphType = typeof(EnumerationGraphType <>).MakeGenericType(type);
}
else
{
throw new ArgumentOutOfRangeException(nameof(type), $"The CLR type '{type.FullName}' cannot be coerced effectively to a GraphQL type.");
}
}
}
else
{
graphType = (mode == TypeMappingMode.OutputType ? typeof(GraphQLClrOutputTypeReference <>) : typeof(GraphQLClrInputTypeReference <>)).MakeGenericType(type);
}
}
}
if (!isNullable)
{
graphType = typeof(NonNullGraphType <>).MakeGenericType(graphType);
}
return(graphType);
