using System.Reflection; namespace System.Text.Json.Serialization { internal static class IEnumerableConverterFactoryHelpers { private const string ImmutableArrayTypeName = "System.Collections.Immutable.ImmutableArray"; private const string ImmutableArrayGenericTypeName = "System.Collections.Immutable.ImmutableArray`1"; private const string ImmutableListTypeName = "System.Collections.Immutable.ImmutableList"; private const string ImmutableListGenericTypeName = "System.Collections.Immutable.ImmutableList`1"; private const string ImmutableListGenericInterfaceTypeName = "System.Collections.Immutable.IImmutableList`1"; private const string ImmutableStackTypeName = "System.Collections.Immutable.ImmutableStack"; private const string ImmutableStackGenericTypeName = "System.Collections.Immutable.ImmutableStack`1"; private const string ImmutableStackGenericInterfaceTypeName = "System.Collections.Immutable.IImmutableStack`1"; private const string ImmutableQueueTypeName = "System.Collections.Immutable.ImmutableQueue"; private const string ImmutableQueueGenericTypeName = "System.Collections.Immutable.ImmutableQueue`1"; private const string ImmutableQueueGenericInterfaceTypeName = "System.Collections.Immutable.IImmutableQueue`1"; private const string ImmutableSortedSetTypeName = "System.Collections.Immutable.ImmutableSortedSet"; private const string ImmutableSortedSetGenericTypeName = "System.Collections.Immutable.ImmutableSortedSet`1"; private const string ImmutableHashSetTypeName = "System.Collections.Immutable.ImmutableHashSet"; private const string ImmutableHashSetGenericTypeName = "System.Collections.Immutable.ImmutableHashSet`1"; private const string ImmutableSetGenericInterfaceTypeName = "System.Collections.Immutable.IImmutableSet`1"; private const string ImmutableDictionaryTypeName = "System.Collections.Immutable.ImmutableDictionary"; private const string ImmutableDictionaryGenericTypeName = "System.Collections.Immutable.ImmutableDictionary`2"; private const string ImmutableDictionaryGenericInterfaceTypeName = "System.Collections.Immutable.IImmutableDictionary`2"; private const string ImmutableSortedDictionaryTypeName = "System.Collections.Immutable.ImmutableSortedDictionary"; private const string ImmutableSortedDictionaryGenericTypeName = "System.Collections.Immutable.ImmutableSortedDictionary`2"; internal static Type GetCompatibleGenericBaseClass(this Type type, Type baseType) { Type type2 = type; while (type2 != (Type)null && type2 != typeof(object)) { if (type2.IsGenericType) { Type genericTypeDefinition = type2.GetGenericTypeDefinition(); if (genericTypeDefinition == baseType) return type2; } type2 = type2.BaseType; } return null; } internal static Type GetCompatibleGenericInterface(this Type type, Type interfaceType) { Type type2 = type; if (type2.IsGenericType) type2 = type2.GetGenericTypeDefinition(); if (type2 == interfaceType) return type; Type[] interfaces = type.GetInterfaces(); foreach (Type type3 in interfaces) { if (type3.IsGenericType) { Type genericTypeDefinition = type3.GetGenericTypeDefinition(); if (genericTypeDefinition == interfaceType) return type3; } } return null; } public static bool IsImmutableDictionaryType(this Type type) { if (type.IsGenericType && type.Assembly.FullName.StartsWith("System.Collections.Immutable,", StringComparison.Ordinal)) { switch (type.GetGenericTypeDefinition().FullName) { case "System.Collections.Immutable.ImmutableDictionary`2": case "System.Collections.Immutable.IImmutableDictionary`2": case "System.Collections.Immutable.ImmutableSortedDictionary`2": return true; default: return false; } } return false; } public static bool IsImmutableEnumerableType(this Type type) { if (!type.IsGenericType || !type.Assembly.FullName.StartsWith("System.Collections.Immutable,", StringComparison.Ordinal)) return false; string fullName = type.GetGenericTypeDefinition().FullName; if (fullName != null) { switch (fullName) { case "System.Collections.Immutable.ImmutableArray`1": case "System.Collections.Immutable.ImmutableList`1": case "System.Collections.Immutable.IImmutableList`1": case "System.Collections.Immutable.ImmutableStack`1": case "System.Collections.Immutable.IImmutableStack`1": case "System.Collections.Immutable.ImmutableQueue`1": case "System.Collections.Immutable.IImmutableQueue`1": case "System.Collections.Immutable.ImmutableSortedSet`1": case "System.Collections.Immutable.ImmutableHashSet`1": case "System.Collections.Immutable.IImmutableSet`1": return true; } } return false; } public static MethodInfo GetImmutableEnumerableCreateRangeMethod(this Type type, Type elementType) { Type immutableEnumerableConstructingType = GetImmutableEnumerableConstructingType(type); MethodInfo[] methods = immutableEnumerableConstructingType.GetMethods(); MethodInfo[] array = methods; foreach (MethodInfo methodInfo in array) { if (methodInfo.Name == "CreateRange" && methodInfo.GetParameters().Length == 1 && methodInfo.IsGenericMethod && methodInfo.GetGenericArguments().Length == 1) return methodInfo.MakeGenericMethod(elementType); } ThrowHelper.ThrowNotSupportedException_SerializationNotSupported(type, null, null); return null; } public static MethodInfo GetImmutableDictionaryCreateRangeMethod(this Type type, Type elementType) { Type immutableDictionaryConstructingType = GetImmutableDictionaryConstructingType(type); MethodInfo[] methods = immutableDictionaryConstructingType.GetMethods(); MethodInfo[] array = methods; foreach (MethodInfo methodInfo in array) { if (methodInfo.Name == "CreateRange" && methodInfo.GetParameters().Length == 1 && methodInfo.IsGenericMethod && methodInfo.GetGenericArguments().Length == 2) return methodInfo.MakeGenericMethod(typeof(string), elementType); } ThrowHelper.ThrowNotSupportedException_SerializationNotSupported(type, null, null); return null; } private static Type GetImmutableEnumerableConstructingType(Type type) { Type genericTypeDefinition = type.GetGenericTypeDefinition(); string fullName = genericTypeDefinition.FullName; if (fullName != null) { string name; switch (fullName) { case "System.Collections.Immutable.ImmutableArray`1": name = "System.Collections.Immutable.ImmutableArray"; goto IL_017d; case "System.Collections.Immutable.ImmutableList`1": case "System.Collections.Immutable.IImmutableList`1": name = "System.Collections.Immutable.ImmutableList"; goto IL_017d; case "System.Collections.Immutable.ImmutableStack`1": case "System.Collections.Immutable.IImmutableStack`1": name = "System.Collections.Immutable.ImmutableStack"; goto IL_017d; case "System.Collections.Immutable.ImmutableQueue`1": case "System.Collections.Immutable.IImmutableQueue`1": name = "System.Collections.Immutable.ImmutableQueue"; goto IL_017d; case "System.Collections.Immutable.ImmutableSortedSet`1": name = "System.Collections.Immutable.ImmutableSortedSet"; goto IL_017d; case "System.Collections.Immutable.ImmutableHashSet`1": case "System.Collections.Immutable.IImmutableSet`1": { name = "System.Collections.Immutable.ImmutableHashSet"; goto IL_017d; } IL_017d: return genericTypeDefinition.Assembly.GetType(name); } } return null; } private static Type GetImmutableDictionaryConstructingType(Type type) { Type genericTypeDefinition = type.GetGenericTypeDefinition(); string name; switch (genericTypeDefinition.FullName) { case "System.Collections.Immutable.ImmutableDictionary`2": case "System.Collections.Immutable.IImmutableDictionary`2": name = "System.Collections.Immutable.ImmutableDictionary"; break; case "System.Collections.Immutable.ImmutableSortedDictionary`2": name = "System.Collections.Immutable.ImmutableSortedDictionary"; break; default: return null; } return genericTypeDefinition.Assembly.GetType(name); } public static bool IsNonGenericStackOrQueue(this Type type) { Type type2 = Type.GetType("System.Collections.Stack, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"); Type type3 = Type.GetType("System.Collections.Queue, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089"); if (!type2.IsAssignableFrom(type)) return type3.IsAssignableFrom(type); return true; } } }