/// <summary>
/// Initializes a new instance of <see cref="DefaultTypeMappings{TRootType}"/>.
/// </summary>
/// <param name="assemblies">The assemblies that contain types that are assignable to the root type.</param>
/// <param name="typeDescriptorPolicy">The type descriptor policy to use.</param>
public DefaultTypeMappings(IEnumerable <Assembly> assemblies, TypeDescriptorPolicy typeDescriptorPolicy)
{
TypeDescriptorPolicy = typeDescriptorPolicy;
var descriptorToType = new Dictionary <string, Type>();
var typeToDescriptor = new Dictionary <Type, string>();
var root = typeof(TRootType);
var types = assemblies.SelectMany(a => a.GetTypes().Where(root.IsAssignableFrom));
foreach (var type in types)
{
var descriptor = typeDescriptorPolicy.GetTypeDescriptor(type);
if (descriptor == null)
{
if (type == RootType && typeDescriptorPolicy.FallbackToRootType)
{
continue;
}
throw new ArgumentException($"Type descriptor policy could not map type: {type}");
}
descriptorToType[descriptor] = type;
typeToDescriptor[type] = descriptor;
}
_descriptorToType = descriptorToType;
_typeToDescriptor = typeToDescriptor;
}
/// <summary>
/// Initializes a new instance of <see cref="ExtensibleJsonConverterFactory"/>.
/// </summary>
/// <param name="typeMappings">The type mappings.</param>
/// <param name="defaultTypeDescriptor">The default type descriptor policy.</param>
public ExtensibleJsonConverterFactory(IEnumerable <ITypeMappings> typeMappings, TypeDescriptorPolicy defaultTypeDescriptor)
{
_defaultTypeDescriptor = defaultTypeDescriptor;
_allTypeMappings = new ConcurrentDictionary <Type, ITypeMappings>();
foreach (var typeMapping in typeMappings)
{
_allTypeMappings[typeMapping.RootType] = typeMapping;
}
}
public static IServiceCollection RegisterExtensibleTypes(
this IServiceCollection serviceCollection,
TypeDescriptorPolicy defaultTypeDescriptorPolicy = null,
IDictionary <Type, TypeDescriptorPolicy> typeDescriptorPolicyOverrides = null)
{
return(serviceCollection.RegisterExtensibleTypes(defaultTypeDescriptorPolicy ?? TypeDescriptorPolicy.Default,
typeDescriptorPolicyOverrides ?? new Dictionary <Type, TypeDescriptorPolicy>(),
AppDomain.CurrentDomain.GetAssemblies()));
}
public static IServiceCollection RegisterExtensibleTypes(
this IServiceCollection serviceCollection,
TypeDescriptorPolicy defaultTypeDescriptorPolicy,
IDictionary <Type, TypeDescriptorPolicy> typeDescriptorPolicyOverrides,
Assembly[] assemblies)
{
serviceCollection.Configure <JsonSerializerOptions>(options =>
{
var rootTypes = assemblies.SelectMany(a => a.GetTypes()
.Where(t =>
{
if (!typeof(IExtensible).IsAssignableFrom(t))
{
return(false);
}
var extensionDataProperty = t.GetProperty(nameof(IExtensible.ExtensionData), typeof(ExtensionData));
return(extensionDataProperty != null && extensionDataProperty.DeclaringType == t);
}))
.Distinct();
var typeHierarchyAssemblyMapping = rootTypes.Select(t => new { Type = t, Assemblies = assemblies.Where(a => a.GetTypes().Any(t.IsAssignableFrom)).Distinct() })
.ToDictionary(o => o.Type, o => o.Assemblies);
var typeMappings = new List <ITypeMappings>();
foreach (var(type, relatedAssemblies) in typeHierarchyAssemblyMapping)
{
if (!typeDescriptorPolicyOverrides.TryGetValue(type, out var typeDescriptorPolicy))
{
typeDescriptorPolicy = defaultTypeDescriptorPolicy;
}
typeMappings.Add(SerializationHelpers.CreateConstructor <SerializationHelpers.DefaultTypeMappingsConstructorDelegate>(typeof(DefaultTypeMappings <>).MakeGenericType(type))(relatedAssemblies, typeDescriptorPolicy));
}
options.Converters.Add(new ExtensibleJsonConverterFactory(typeMappings, defaultTypeDescriptorPolicy));
});
return(serviceCollection);
}