/// <summary>
/// Writes a primitive array to the stream.
/// </summary>
/// <typeparam name="T">The element type of the primitive array. Valid element types can be determined using <see cref="FormatterUtilities.IsPrimitiveArrayType(Type)" />.</typeparam>
/// <param name="array">The primitive array to write.</param>
/// <exception cref="System.ArgumentException">Type + typeof(T).Name + is not a valid primitive array type.</exception>
/// <exception cref="System.ArgumentNullException">array</exception>
public override void WritePrimitiveArray <T>(T[] array)
{
if (FormatterUtilities.IsPrimitiveArrayType(typeof(T)) == false)
{
throw new ArgumentException("Type " + typeof(T).Name + " is not a valid primitive array type.");
}
if (array == null)
{
throw new ArgumentNullException("array");
}
Action <string, T> writer = (Action <string, T>) this.primitiveTypeWriters[typeof(T)];
this.WriteInt64(JsonConfig.PRIMITIVE_ARRAY_LENGTH_SIG, array.Length);
this.WriteEntry(JsonConfig.PRIMITIVE_ARRAY_CONTENT_SIG, "[");
this.forceNoSeparatorNextLine = true;
this.PushArray();
for (int i = 0; i < array.Length; i++)
{
writer(null, array[i]);
}
this.PopArray();
this.StartNewLine(true);
this.writer.Write("]");
}
/// <summary>
/// Reads a primitive array value. This call will succeed if the next entry is an <see cref="EntryType.PrimitiveArray" />.
/// <para />
/// If the call fails (and returns <c>false</c>), it will skip the current entry value, unless that entry is an <see cref="EntryType.EndOfNode" /> or an <see cref="EntryType.EndOfArray" />.
/// </summary>
/// <typeparam name="T">The element type of the primitive array. Valid element types can be determined using <see cref="FormatterUtilities.IsPrimitiveArrayType(Type)" />.</typeparam>
/// <param name="array">The resulting primitive array.</param>
/// <returns>
/// <c>true</c> if reading a primitive array succeeded, otherwise <c>false</c>
/// </returns>
/// <exception cref="System.ArgumentException">Type + typeof(T).Name + is not a valid primitive array type.</exception>
public override bool ReadPrimitiveArray <T>(out T[] array)
{
if (FormatterUtilities.IsPrimitiveArrayType(typeof(T)) == false)
{
throw new ArgumentException("Type " + typeof(T).Name + " is not a valid primitive array type.");
}
this.PeekEntry();
if (this.peekedEntryType == EntryType.PrimitiveArray)
{
this.PushArray();
if (this.peekedEntryName != JsonConfig.PRIMITIVE_ARRAY_LENGTH_SIG)
{
this.Context.Config.DebugContext.LogError("Array entry wasn't preceded by an array length entry!");
array = null; // No array content for you!
return(false);
}
else
{
int intLength;
if (int.TryParse(this.peekedEntryContent, NumberStyles.Any, CultureInfo.InvariantCulture, out intLength) == false)
{
this.Context.Config.DebugContext.LogError("Failed to parse array length: " + this.peekedEntryContent);
array = null; // No array content for you!
return(false);
}
this.ReadToNextEntry();
if (this.peekedEntryName != JsonConfig.PRIMITIVE_ARRAY_CONTENT_SIG)
{
this.Context.Config.DebugContext.LogError("Failed to find primitive array content entry after array length entry!");
array = null; // No array content for you!
return(false);
}
this.peekedEntryType = null;
Func <T> reader = (Func <T>) this.primitiveArrayReaders[typeof(T)];
array = new T[intLength];
for (int i = 0; i < intLength; i++)
{
array[i] = reader();
}
this.ExitArray();
return(true);
}
}
else
{
this.SkipEntry();
array = null;
return(false);
}
}
public bool TryGetFormatter(Type type, FormatterLocationStep step, ISerializationPolicy policy, out IFormatter formatter)
{
if (!type.IsArray)
{
formatter = null;
return(false);
}
if (type.GetArrayRank() == 1)
{
if (FormatterUtilities.IsPrimitiveArrayType(type.GetElementType()))
{
formatter = (IFormatter)Activator.CreateInstance(typeof(PrimitiveArrayFormatter <>).MakeGenericType(type.GetElementType()));
}
else
{
formatter = (IFormatter)Activator.CreateInstance(typeof(ArrayFormatter <>).MakeGenericType(type.GetElementType()));
}
}
else
{
formatter = (IFormatter)Activator.CreateInstance(typeof(MultiDimensionalArrayFormatter <,>).MakeGenericType(type, type.GetElementType()));
}
return(true);
}
/// <summary>
/// Provides the actual implementation for serializing a value of type <see cref="T" />.
/// </summary>
/// <param name="value">The value to serialize.</param>
/// <param name="writer">The writer to serialize with.</param>
protected override void SerializeImplementation(ref T value, IDataWriter writer)
{
var members = FormatterUtilities.GetSerializableMembers(typeof(T), this.OverridePolicy ?? writer.Context.Config.SerializationPolicy);
for (int i = 0; i < members.Length; i++)
{
var member = members[i];
Type type;
var memberValue = FormatterUtilities.GetMemberValue(member, value);
if (object.ReferenceEquals(memberValue, null))
{
type = FormatterUtilities.GetContainedType(member);
}
else
{
type = memberValue.GetType();
}
var serializer = Serializer.Get(type);
try
{
serializer.WriteValueWeak(member.Name, memberValue, writer);
}
catch (Exception ex)
{
writer.Context.Config.DebugContext.LogException(ex);
}
}
}
private static void EmitWriteMethodContents(
ILGenerator gen,
Type formattedType,
Dictionary <Type, FieldBuilder> serializerFields,
Dictionary <MemberInfo, List <string> > memberNames,
Dictionary <Type, MethodInfo> serializerWriteMethods)
{
foreach (var member in memberNames.Keys)
{
var memberType = FormatterUtilities.GetContainedType(member);
gen.Emit(OpCodes.Ldsfld, serializerFields[memberType]); // Load serializer instance for type
gen.Emit(OpCodes.Ldstr, member.Name); // Load member name string
// Now we load the value of the actual member
if (member is FieldInfo)
{
var fieldInfo = member as FieldInfo;
if (formattedType.IsValueType)
{
gen.Emit(OpCodes.Ldarg_0); // Load value argument
gen.Emit(OpCodes.Ldfld, fieldInfo.DeAliasField()); // Load value of field
}
else
{
gen.Emit(OpCodes.Ldarg_0); // Load value argument reference
gen.Emit(OpCodes.Ldind_Ref); // Indirectly load value of reference
gen.Emit(OpCodes.Ldfld, fieldInfo.DeAliasField()); // Load value of field
}
}
else if (member is PropertyInfo)
{
var propInfo = member as PropertyInfo;
if (formattedType.IsValueType)
{
gen.Emit(OpCodes.Ldarg_0); // Load value argument
gen.Emit(OpCodes.Call, propInfo.DeAliasProperty().GetGetMethod(true)); // Call property getter
}
else
{
gen.Emit(OpCodes.Ldarg_0); // Load value argument reference
gen.Emit(OpCodes.Ldind_Ref); // Indirectly load value of reference
gen.Emit(OpCodes.Callvirt, propInfo.DeAliasProperty().GetGetMethod(true)); // Call property getter
}
}
else
{
throw new NotImplementedException();
}
gen.Emit(OpCodes.Ldarg_1); // Load writer argument
gen.Emit(OpCodes.Callvirt, serializerWriteMethods[memberType]); // Call Serializer.WriteValue(string name, T value, IDataWriter writer)
}
gen.Emit(OpCodes.Ret); // Return method
}
/// <summary>
/// Reads a primitive array value. This call will succeed if the next entry is an <see cref="EntryType.PrimitiveArray" />.
/// <para />
/// If the call fails (and returns <c>false</c>), it will skip the current entry value, unless that entry is an <see cref="EntryType.EndOfNode" /> or an <see cref="EntryType.EndOfArray" />.
/// </summary>
/// <typeparam name="T">The element type of the primitive array. Valid element types can be determined using <see cref="FormatterUtilities.IsPrimitiveArrayType(Type)" />.</typeparam>
/// <param name="array">The resulting primitive array.</param>
/// <returns>
/// <c>true</c> if reading a primitive array succeeded, otherwise <c>false</c>
/// </returns>
/// <exception cref="System.ArgumentException">Type + typeof(T).Name + is not a valid primitive array type.</exception>
public override bool ReadPrimitiveArray <T>(out T[] array)
{
if (FormatterUtilities.IsPrimitiveArrayType(typeof(T)) == false)
{
throw new ArgumentException("Type " + typeof(T).Name + " is not a valid primitive array type.");
}
if (this.peekedEntryType != EntryType.PrimitiveArray)
{
this.SkipEntry();
array = null;
return(false);
}
if (typeof(T) == typeof(byte))
{
array = (T[])(object)ProperBitConverter.HexStringToBytes(this.peekedEntryData);
return(true);
}
else
{
this.PeekEntry();
long length;
if (this.peekedEntryType != EntryType.PrimitiveArray)
{
this.Context.Config.DebugContext.LogError("Expected entry of type '" + EntryType.StartOfArray + "' when reading primitive array but got entry of type '" + this.peekedEntryType + "'.");
this.SkipEntry();
array = new T[0];
return(false);
}
if (!long.TryParse(this.peekedEntryData, NumberStyles.Any, CultureInfo.InvariantCulture, out length))
{
this.Context.Config.DebugContext.LogError("Failed to parse primitive array length from entry data '" + this.peekedEntryData + "'.");
this.SkipEntry();
array = new T[0];
return(false);
}
this.ConsumeCurrentEntry();
this.PushArray();
array = new T[length];
Func <T> reader = (Func <T>) this.primitiveTypeReaders[typeof(T)];
for (int i = 0; i < length; i++)
{
array[i] = reader();
}
this.ExitArray();
return(true);
}
}
private static IFormatter CreateGenericFormatter(Type formattedType, ModuleBuilder moduleBuilder, ISerializationPolicy policy)
{
Dictionary <string, MemberInfo> serializableMembers = FormatterUtilities.GetSerializableMembersMap(formattedType, policy);
if (serializableMembers.Count == 0)
{
return((IFormatter)Activator.CreateInstance(typeof(EmptyTypeFormatter <>).MakeGenericType(formattedType)));
}
string helperTypeName = moduleBuilder.Name + "." + formattedType.GetCompilableNiceFullName() + "___" + formattedType.Assembly.GetName().Name + "___FormatterHelper___" + Guid.NewGuid().ToString();
Dictionary <Type, MethodInfo> serializerReadMethods;
Dictionary <Type, MethodInfo> serializerWriteMethods;
Dictionary <Type, FieldBuilder> serializerFields;
FieldBuilder dictField;
Dictionary <MemberInfo, List <string> > memberNames;
BuildHelperType(
moduleBuilder,
helperTypeName,
formattedType,
serializableMembers,
out serializerReadMethods,
out serializerWriteMethods,
out serializerFields,
out dictField,
out memberNames
);
Type formatterType = typeof(RuntimeEmittedFormatter <>).MakeGenericType(formattedType);
Delegate del1, del2;
// Read
{
Type readDelegateType = typeof(ReadDataEntryMethodDelegate <>).MakeGenericType(formattedType);
MethodInfo readDataEntryMethod = formatterType.GetMethod("ReadDataEntry", Flags.InstanceAnyVisibility);
DynamicMethod dynamicReadMethod = new DynamicMethod("Dynamic_" + formattedType.GetCompilableNiceFullName(), null, readDataEntryMethod.GetParameters().Select(n => n.ParameterType).ToArray(), true);
readDataEntryMethod.GetParameters().ForEach(n => dynamicReadMethod.DefineParameter(n.Position, n.Attributes, n.Name));
EmitReadMethodContents(dynamicReadMethod.GetILGenerator(), formattedType, dictField, serializerFields, memberNames, serializerReadMethods);
del1 = dynamicReadMethod.CreateDelegate(readDelegateType);
}
// Write
{
Type writeDelegateType = typeof(WriteDataEntriesMethodDelegate <>).MakeGenericType(formattedType);
MethodInfo writeDataEntriesMethod = formatterType.GetMethod("WriteDataEntries", Flags.InstanceAnyVisibility);
DynamicMethod dynamicWriteMethod = new DynamicMethod("Dynamic_Write_" + formattedType.GetCompilableNiceFullName(), null, writeDataEntriesMethod.GetParameters().Select(n => n.ParameterType).ToArray(), true);
writeDataEntriesMethod.GetParameters().ForEach(n => dynamicWriteMethod.DefineParameter(n.Position + 1, n.Attributes, n.Name));
EmitWriteMethodContents(dynamicWriteMethod.GetILGenerator(), formattedType, serializerFields, memberNames, serializerWriteMethods);
del2 = dynamicWriteMethod.CreateDelegate(writeDelegateType);
}
return((IFormatter)Activator.CreateInstance(formatterType, del1, del2));
}
/// <summary>
/// Writes a primitive array to the stream.
/// </summary>
/// <typeparam name="T">The element type of the primitive array. Valid element types can be determined using <see cref="FormatterUtilities.IsPrimitiveArrayType(Type)" />.</typeparam>
/// <param name="array">The primitive array to write.</param>
/// <exception cref="System.ArgumentException">Type + typeof(T).Name + is not a valid primitive array type.</exception>
public override void WritePrimitiveArray <T>(T[] array)
{
if (FormatterUtilities.IsPrimitiveArrayType(typeof(T)) == false)
{
throw new ArgumentException("Type " + typeof(T).Name + " is not a valid primitive array type.");
}
int bytesPerElement = PrimitiveSizes[typeof(T)];
int byteCount = array.Length * bytesPerElement;
// Write entry flag
this.Stream.WriteByte((byte)BinaryEntryType.PrimitiveArray);
// Write array length
ProperBitConverter.GetBytes(this.buffer, 0, array.Length);
this.Stream.Write(this.buffer, 0, 4);
// Write size of an element in bytes
ProperBitConverter.GetBytes(this.buffer, 0, bytesPerElement);
this.Stream.Write(this.buffer, 0, 4);
// Write the actual array content
if (typeof(T) == typeof(byte))
{
// We can include a special case for byte arrays, as there's no need to copy that to a buffer
var byteArray = (byte[])(object)array;
this.Stream.Write(byteArray, 0, byteCount);
}
else
{
// Otherwise we copy to a buffer in order to write the entire array into the stream with one call
using (var tempBuffer = Buffer <byte> .Claim(byteCount))
{
if (BitConverter.IsLittleEndian)
{
// We always store in little endian, so we can do a direct memory mapping, which is a lot faster
UnsafeUtilities.MemoryCopy(array, tempBuffer.Array, byteCount, 0, 0);
}
else
{
// We have to convert each individual element to bytes, since the byte order has to be reversed
Action <byte[], int, T> toBytes = (Action <byte[], int, T>)PrimitiveGetBytesMethods[typeof(T)];
var b = tempBuffer.Array;
for (int i = 0; i < array.Length; i++)
{
toBytes(b, i * bytesPerElement, array[i]);
}
}
this.Stream.Write(tempBuffer.Array, 0, byteCount);
}
}
}
/// <summary>
/// Provides the actual implementation for deserializing a value of type <see cref="T" />.
/// </summary>
/// <param name="value">The uninitialized value to serialize into. This value will have been created earlier using <see cref="BaseFormatter{T}.GetUninitializedObject" />.</param>
/// <param name="reader">The reader to deserialize with.</param>
protected override void DeserializeImplementation(ref T value, IDataReader reader)
{
// We sadly *must* box so that complex value types get their values properly set by reflection.
// At least we only box these once.
object boxedValue = value;
var members = FormatterUtilities.GetSerializableMembersMap(typeof(T), this.OverridePolicy ?? reader.Context.Config.SerializationPolicy);
EntryType entryType;
string name;
while ((entryType = reader.PeekEntry(out name)) != EntryType.EndOfNode && entryType != EntryType.EndOfArray && entryType != EntryType.EndOfStream)
{
if (string.IsNullOrEmpty(name))
{
reader.Context.Config.DebugContext.LogError("Entry of type \"" + entryType + "\" in node \"" + reader.CurrentNodeName + "\" is missing a name.");
reader.SkipEntry();
continue;
}
MemberInfo member;
if (members.TryGetValue(name, out member) == false)
{
reader.Context.Config.DebugContext.LogWarning("Lost serialization data for entry \"" + name + "\" of type \"" + entryType + "\"in node \"" + reader.CurrentNodeName + "\".");
reader.SkipEntry();
continue;
}
Type expectedType = FormatterUtilities.GetContainedType(member);
try
{
var serializer = Serializer.Get(expectedType);
object entryValue = serializer.ReadValueWeak(reader);
FormatterUtilities.SetMemberValue(member, boxedValue, entryValue);
}
catch (Exception ex)
{
reader.Context.Config.DebugContext.LogException(ex);
}
}
value = (T)boxedValue; // Unbox
}
/// <summary>
/// Not yet documented.
/// </summary>
public override void WritePrimitiveArray <T>(T[] array)
{
if (FormatterUtilities.IsPrimitiveArrayType(typeof(T)) == false)
{
throw new ArgumentException("Type " + typeof(T).Name + " is not a valid primitive array type.");
}
if (typeof(T) == typeof(byte))
{
string hex = ProperBitConverter.BytesToHexString((byte[])(object)array);
this.Nodes.Add(new SerializationNode()
{
Name = string.Empty,
Entry = EntryType.PrimitiveArray,
Data = hex
});
}
else
{
this.Nodes.Add(new SerializationNode()
{
Name = string.Empty,
Entry = EntryType.PrimitiveArray,
Data = array.LongLength.ToString(CultureInfo.InvariantCulture)
});
this.PushArray();
Action <string, T> writer = (Action <string, T>) this.primitiveTypeWriters[typeof(T)];
for (int i = 0; i < array.Length; i++)
{
writer(string.Empty, array[i]);
}
this.EndArrayNode();
}
}
internal static List <IFormatter> GetAllCompatiblePredefinedFormatters(Type type, ISerializationPolicy policy)
{
if (FormatterUtilities.IsPrimitiveType(type))
{
throw new ArgumentException("Cannot create formatters for a primitive type like " + type.Name);
}
List <IFormatter> formatters = new List <IFormatter>();
// First call formatter locators before checking for registered formatters
for (int i = 0; i < FormatterLocators.Count; i++)
{
try
{
IFormatter result;
if (FormatterLocators[i].LocatorInstance.TryGetFormatter(type, FormatterLocationStep.BeforeRegisteredFormatters, policy, out result))
{
formatters.Add(result);
}
}
catch (TargetInvocationException ex)
{
throw ex;
}
catch (TypeInitializationException ex)
{
throw ex;
}
#pragma warning disable CS0618 // Type or member is obsolete
catch (ExecutionEngineException ex)
#pragma warning restore CS0618 // Type or member is obsolete
{
throw ex;
}
catch (Exception ex)
{
Debug.LogException(new Exception("Exception was thrown while calling FormatterLocator " + FormatterLocators[i].GetType().FullName + ".", ex));
}
}
// Then check for valid registered formatters
for (int i = 0; i < FormatterInfos.Count; i++)
{
var info = FormatterInfos[i];
Type formatterType = null;
if (type == info.TargetType)
{
formatterType = info.FormatterType;
}
else if (info.FormatterType.IsGenericType && info.TargetType.IsGenericParameter)
{
Type[] inferredArgs;
if (info.FormatterType.TryInferGenericParameters(out inferredArgs, type))
{
formatterType = info.FormatterType.GetGenericTypeDefinition().MakeGenericType(inferredArgs);
}
}
else if (type.IsGenericType && info.FormatterType.IsGenericType && info.TargetType.IsGenericType && type.GetGenericTypeDefinition() == info.TargetType.GetGenericTypeDefinition())
{
Type[] args = type.GetGenericArguments();
if (info.FormatterType.AreGenericConstraintsSatisfiedBy(args))
{
formatterType = info.FormatterType.GetGenericTypeDefinition().MakeGenericType(args);
}
}
if (formatterType != null)
{
var instance = GetFormatterInstance(formatterType);
if (instance == null)
{
continue;
}
if (info.AskIfCanFormatTypes && !((IAskIfCanFormatTypes)instance).CanFormatType(type))
{
continue;
}
formatters.Add(instance);
}
}
// Then call formatter locators after checking for registered formatters
for (int i = 0; i < FormatterLocators.Count; i++)
{
try
{
IFormatter result;
if (FormatterLocators[i].LocatorInstance.TryGetFormatter(type, FormatterLocationStep.AfterRegisteredFormatters, policy, out result))
{
formatters.Add(result);
}
}
catch (TargetInvocationException ex)
{
throw ex;
}
catch (TypeInitializationException ex)
{
throw ex;
}
#pragma warning disable CS0618 // Type or member is obsolete
catch (ExecutionEngineException ex)
#pragma warning restore CS0618 // Type or member is obsolete
{
throw ex;
}
catch (Exception ex)
{
Debug.LogException(new Exception("Exception was thrown while calling FormatterLocator " + FormatterLocators[i].GetType().FullName + ".", ex));
}
}
formatters.Add((IFormatter)Activator.CreateInstance(typeof(ReflectionFormatter <>).MakeGenericType(type)));
return(formatters);
}
private static Type BuildHelperType(
ModuleBuilder moduleBuilder,
string helperTypeName,
Type formattedType,
Dictionary <string, MemberInfo> serializableMembers,
out Dictionary <Type, MethodInfo> serializerReadMethods,
out Dictionary <Type, MethodInfo> serializerWriteMethods,
out Dictionary <Type, FieldBuilder> serializerFields,
out FieldBuilder dictField,
out Dictionary <MemberInfo, List <string> > memberNames)
{
TypeBuilder helperTypeBuilder = moduleBuilder.DefineType(helperTypeName, TypeAttributes.Public | TypeAttributes.Sealed | TypeAttributes.Class);
memberNames = new Dictionary <MemberInfo, List <string> >();
foreach (var entry in serializableMembers)
{
List <string> list;
if (memberNames.TryGetValue(entry.Value, out list) == false)
{
list = new List <string>();
memberNames.Add(entry.Value, list);
}
list.Add(entry.Key);
}
dictField = helperTypeBuilder.DefineField("SwitchLookup", typeof(Dictionary <string, int>), FieldAttributes.Public | FieldAttributes.Static | FieldAttributes.InitOnly);
List <Type> neededSerializers = memberNames.Keys.Select(n => FormatterUtilities.GetContainedType(n)).Distinct().ToList();
serializerReadMethods = new Dictionary <Type, MethodInfo>(neededSerializers.Count);
serializerWriteMethods = new Dictionary <Type, MethodInfo>(neededSerializers.Count);
serializerFields = new Dictionary <Type, FieldBuilder>(neededSerializers.Count);
foreach (var t in neededSerializers)
{
string name = t.GetCompilableNiceFullName() + "__Serializer";
int counter = 1;
while (serializerFields.Values.Any(n => n.Name == name))
{
counter++;
name = t.GetCompilableNiceFullName() + "__Serializer" + counter;
}
Type serializerType = typeof(Serializer <>).MakeGenericType(t);
serializerReadMethods.Add(t, serializerType.GetMethod("ReadValue", Flags.InstancePublicDeclaredOnly));
serializerWriteMethods.Add(t, serializerType.GetMethod("WriteValue", Flags.InstancePublicDeclaredOnly, null, new[] { typeof(string), t, typeof(IDataWriter) }, null));
serializerFields.Add(t, helperTypeBuilder.DefineField(name, serializerType, FieldAttributes.Public | FieldAttributes.Static | FieldAttributes.InitOnly));
}
//FieldBuilder readMethodFieldBuilder = helperTypeBuilder.DefineField("ReadMethod", readDelegateType, FieldAttributes.Public | FieldAttributes.Static | FieldAttributes.InitOnly);
//FieldBuilder writeMethodFieldBuilder = helperTypeBuilder.DefineField("WriteMethod", writeDelegateType, FieldAttributes.Public | FieldAttributes.Static | FieldAttributes.InitOnly);
// We generate a static constructor for our formatter helper type that initializes our switch lookup dictionary and our needed Serializer references
{
var addMethod = typeof(Dictionary <string, int>).GetMethod("Add", Flags.InstancePublic);
var dictionaryConstructor = typeof(Dictionary <string, int>).GetConstructor(Type.EmptyTypes);
var serializerGetMethod = typeof(Serializer).GetMethod("Get", Flags.StaticPublic, null, new[] { typeof(Type) }, null);
var typeOfMethod = typeof(Type).GetMethod("GetTypeFromHandle", Flags.StaticPublic, null, new Type[] { typeof(RuntimeTypeHandle) }, null);
ConstructorBuilder staticConstructor = helperTypeBuilder.DefineTypeInitializer();
ILGenerator gen = staticConstructor.GetILGenerator();
gen.Emit(OpCodes.Newobj, dictionaryConstructor); // Create new dictionary
int count = 0;
foreach (var entry in memberNames)
{
foreach (var name in entry.Value)
{
gen.Emit(OpCodes.Dup); // Load duplicate dictionary value
gen.Emit(OpCodes.Ldstr, name); // Load entry name
gen.Emit(OpCodes.Ldc_I4, count); // Load entry index
gen.Emit(OpCodes.Call, addMethod); // Call dictionary add
}
count++;
}
gen.Emit(OpCodes.Stsfld, dictField); // Set static dictionary field to dictionary value
foreach (var entry in serializerFields)
{
gen.Emit(OpCodes.Ldtoken, entry.Key); // Load type token
gen.Emit(OpCodes.Call, typeOfMethod); // Call typeof method (this pushes a type value onto the stack)
gen.Emit(OpCodes.Call, serializerGetMethod); // Call Serializer.Get(Type type) method
gen.Emit(OpCodes.Stsfld, entry.Value); // Set static serializer field to result of get method
}
gen.Emit(OpCodes.Ret); // Return
}
// Now we need to actually create the serializer container type so we can generate the dynamic methods below without getting TypeLoadExceptions up the wazoo
return(helperTypeBuilder.CreateType());
}
/// <summary>
/// Emits a formatter for a given type into a given module builder, using a given serialization policy to determine which members to serialize.
/// </summary>
/// <param name="formattedType">Type to create a formatter for.</param>
/// <param name="moduleBuilder">The module builder to emit a formatter into.</param>
/// <param name="policy">The serialization policy to use for creating the formatter.</param>
/// <returns>The fully constructed, emitted formatter type.</returns>
public static Type EmitAOTFormatter(Type formattedType, ModuleBuilder moduleBuilder, ISerializationPolicy policy)
{
Dictionary <string, MemberInfo> serializableMembers = FormatterUtilities.GetSerializableMembersMap(formattedType, policy);
string formatterName = moduleBuilder.Name + "." + formattedType.GetCompilableNiceFullName() + "__AOTFormatter";
string formatterHelperName = moduleBuilder.Name + "." + formattedType.GetCompilableNiceFullName() + "__FormatterHelper";
if (serializableMembers.Count == 0)
{
return(moduleBuilder.DefineType(
formatterName,
TypeAttributes.Public | TypeAttributes.Sealed | TypeAttributes.Class,
typeof(EmptyAOTEmittedFormatter <>).MakeGenericType(formattedType)
).CreateType());
}
Dictionary <Type, MethodInfo> serializerReadMethods;
Dictionary <Type, MethodInfo> serializerWriteMethods;
Dictionary <Type, FieldBuilder> serializerFields;
FieldBuilder dictField;
Dictionary <MemberInfo, List <string> > memberNames;
BuildHelperType(
moduleBuilder,
formatterHelperName,
formattedType,
serializableMembers,
out serializerReadMethods,
out serializerWriteMethods,
out serializerFields,
out dictField,
out memberNames
);
TypeBuilder formatterType = moduleBuilder.DefineType(
formatterName,
TypeAttributes.Public | TypeAttributes.Sealed | TypeAttributes.Class,
typeof(AOTEmittedFormatter <>).MakeGenericType(formattedType)
);
// Read
{
MethodInfo readBaseMethod = formatterType.BaseType.GetMethod("ReadDataEntry", Flags.InstanceAnyVisibility);
MethodBuilder readMethod = formatterType.DefineMethod(
readBaseMethod.Name,
MethodAttributes.Family | MethodAttributes.Virtual,
readBaseMethod.ReturnType,
readBaseMethod.GetParameters().Select(n => n.ParameterType).ToArray()
);
readBaseMethod.GetParameters().ForEach(n => readMethod.DefineParameter(n.Position, n.Attributes, n.Name));
EmitReadMethodContents(readMethod.GetILGenerator(), formattedType, dictField, serializerFields, memberNames, serializerReadMethods);
}
// Write
{
MethodInfo writeBaseMethod = formatterType.BaseType.GetMethod("WriteDataEntries", Flags.InstanceAnyVisibility);
MethodBuilder dynamicWriteMethod = formatterType.DefineMethod(
writeBaseMethod.Name,
MethodAttributes.Family | MethodAttributes.Virtual,
writeBaseMethod.ReturnType,
writeBaseMethod.GetParameters().Select(n => n.ParameterType).ToArray()
);
writeBaseMethod.GetParameters().ForEach(n => dynamicWriteMethod.DefineParameter(n.Position + 1, n.Attributes, n.Name));
EmitWriteMethodContents(dynamicWriteMethod.GetILGenerator(), formattedType, serializerFields, memberNames, serializerWriteMethods);
}
var result = formatterType.CreateType();
// Register the formatter on the assembly
((AssemblyBuilder)moduleBuilder.Assembly).SetCustomAttribute(new CustomAttributeBuilder(typeof(RegisterFormatterAttribute).GetConstructor(new Type[] { typeof(Type), typeof(int) }), new object[] { formatterType, -1 }));
return(result);
}
private static Serializer Create(Type type)
{
try
{
Type resultType = null;
if (type.IsEnum)
{
resultType = typeof(EnumSerializer <>).MakeGenericType(type);
}
else if (FormatterUtilities.IsPrimitiveType(type))
{
try
{
resultType = PrimitiveReaderWriterTypes[type];
}
catch (KeyNotFoundException)
{
UnityEngine.Debug.LogError("Failed to find primitive serializer for " + type.Name);
}
}
else
{
resultType = typeof(ComplexTypeSerializer <>).MakeGenericType(type);
}
return((Serializer)Activator.CreateInstance(resultType));
}
// System.ExecutionEngineException is marked obsolete in .NET 4.6
// That's all very good for .NET, but Unity still uses it!
#pragma warning disable 618
catch (TargetInvocationException ex)
{
if (ex.GetBaseException() is ExecutionEngineException)
{
LogAOTError(type, ex.GetBaseException() as ExecutionEngineException);
return(null);
}
else
{
throw ex;
}
}
catch (TypeInitializationException ex)
{
if (ex.GetBaseException() is ExecutionEngineException)
{
LogAOTError(type, ex.GetBaseException() as ExecutionEngineException);
return(null);
}
else
{
throw ex;
}
}
catch (ExecutionEngineException ex)
{
LogAOTError(type, ex);
return(null);
}
}
private static void ReplaceAllReferencesInGraph(object graph, object oldReference, object newReference, HashSet <object> processedReferences = null)
{
if (processedReferences == null)
{
processedReferences = new HashSet <object>(ReferenceEqualityComparer <object> .Default);
}
processedReferences.Add(graph);
if (graph.GetType().IsArray)
{
Array array = (Array)graph;
for (int i = 0; i < array.Length; i++)
{
var value = array.GetValue(i);
if (object.ReferenceEquals(value, null))
{
continue;
}
if (object.ReferenceEquals(value, oldReference))
{
array.SetValue(newReference, i);
value = newReference;
}
if (!processedReferences.Contains(value))
{
ReplaceAllReferencesInGraph(value, oldReference, newReference, processedReferences);
}
}
}
else
{
var members = FormatterUtilities.GetSerializableMembers(graph.GetType(), SerializationPolicies.Everything);
for (int i = 0; i < members.Length; i++)
{
FieldInfo field = (FieldInfo)members[i];
if (field.FieldType.IsPrimitive || field.FieldType == typeof(SerializationData) || field.FieldType == typeof(string))
{
continue;
}
object value = field.GetValue(graph);
if (object.ReferenceEquals(value, null))
{
continue;
}
Type valueType = value.GetType();
if (valueType.IsPrimitive || valueType == typeof(SerializationData) || valueType == typeof(string))
{
continue;
}
if (object.ReferenceEquals(value, oldReference))
{
field.SetValue(graph, newReference);
value = newReference;
}
if (!processedReferences.Contains(value))
{
ReplaceAllReferencesInGraph(value, oldReference, newReference, processedReferences);
}
}
}
}
private static void EmitReadMethodContents(
ILGenerator gen,
Type formattedType,
FieldInfo dictField,
Dictionary <Type, FieldBuilder> serializerFields,
Dictionary <MemberInfo, List <string> > memberNames,
Dictionary <Type, MethodInfo> serializerReadMethods)
{
MethodInfo skipMethod = typeof(IDataReader).GetMethod("SkipEntry", Flags.InstancePublic);
MethodInfo tryGetValueMethod = typeof(Dictionary <string, int>).GetMethod("TryGetValue", Flags.InstancePublic);
//methodBuilder.DefineParameter(5, ParameterAttributes.None, "switchLookup");
LocalBuilder lookupResult = gen.DeclareLocal(typeof(int));
Label defaultLabel = gen.DefineLabel();
Label switchLabel = gen.DefineLabel();
Label endLabel = gen.DefineLabel();
Label[] switchLabels = memberNames.Select(n => gen.DefineLabel()).ToArray();
gen.Emit(OpCodes.Ldarg_1); // Load entryName string
gen.Emit(OpCodes.Ldnull); // Load null
gen.Emit(OpCodes.Ceq); // Equality check
gen.Emit(OpCodes.Brtrue, defaultLabel); // If entryName is null, go to default case
//gen.Emit(OpCodes.Ldarg, (short)4); // Load lookup dictionary argument (OLD CODE)
gen.Emit(OpCodes.Ldsfld, dictField); // Load lookup dictionary from static field on helper type
gen.Emit(OpCodes.Ldarg_1); // Load entryName string
gen.Emit(OpCodes.Ldloca, (short)lookupResult.LocalIndex); // Load address of lookupResult
gen.Emit(OpCodes.Callvirt, tryGetValueMethod); // Call TryGetValue on the dictionary
gen.Emit(OpCodes.Brtrue, switchLabel); // If TryGetValue returned true, go to the switch case
gen.Emit(OpCodes.Br, defaultLabel); // Else, go to the default case
gen.MarkLabel(switchLabel); // Switch starts here
gen.Emit(OpCodes.Ldloc, lookupResult); // Load lookupResult
gen.Emit(OpCodes.Switch, switchLabels); // Perform switch on switchLabels
int count = 0;
foreach (var member in memberNames.Keys)
{
var memberType = FormatterUtilities.GetContainedType(member);
var propInfo = member as PropertyInfo;
var fieldInfo = member as FieldInfo;
gen.MarkLabel(switchLabels[count]); // Switch case for [count] starts here
// Now we load the instance that we have to set the value on
gen.Emit(OpCodes.Ldarg_0); // Load value reference
if (formattedType.IsValueType == false)
{
gen.Emit(OpCodes.Ldind_Ref); // Indirectly load value of reference
}
// Now we deserialize the value itself
gen.Emit(OpCodes.Ldsfld, serializerFields[memberType]); // Load serializer from serializer container type
gen.Emit(OpCodes.Ldarg, (short)3); // Load reader argument
gen.Emit(OpCodes.Callvirt, serializerReadMethods[memberType]); // Call Serializer.ReadValue(IDataReader reader)
// The stack now contains the formatted instance and the deserialized value to set the member to
// Now we set the value
if (fieldInfo != null)
{
gen.Emit(OpCodes.Stfld, fieldInfo.DeAliasField()); // Set field
}
else if (propInfo != null)
{
gen.Emit(OpCodes.Callvirt, propInfo.DeAliasProperty().GetSetMethod(true)); // Call property setter
}
else
{
throw new NotImplementedException();
}
gen.Emit(OpCodes.Br, endLabel); // Jump to end of method
count++;
}
gen.MarkLabel(defaultLabel); // Default case starts here
gen.Emit(OpCodes.Ldarg, (short)3); // Load reader argument
gen.Emit(OpCodes.Callvirt, skipMethod); // Call IDataReader.SkipEntry
gen.MarkLabel(endLabel); // Method end starts here
gen.Emit(OpCodes.Ret); // Return method
}
private static IFormatter CreateFormatter(Type type, ISerializationPolicy policy)
{
if (FormatterUtilities.IsPrimitiveType(type))
{
throw new ArgumentException("Cannot create formatters for a primitive type like " + type.Name);
}
// First call formatter locators before checking for registered formatters
for (int i = 0; i < FormatterLocators.Count; i++)
{
try
{
IFormatter result;
if (FormatterLocators[i].LocatorInstance.TryGetFormatter(type, FormatterLocationStep.BeforeRegisteredFormatters, policy, out result))
{
return(result);
}
}
catch (TargetInvocationException ex)
{
throw ex;
}
catch (TypeInitializationException ex)
{
throw ex;
}
#pragma warning disable CS0618 // Type or member is obsolete
catch (ExecutionEngineException ex)
#pragma warning restore CS0618 // Type or member is obsolete
{
throw ex;
}
catch (Exception ex)
{
Debug.LogException(new Exception("Exception was thrown while calling FormatterLocator " + FormatterLocators[i].GetType().FullName + ".", ex));
}
}
// Then check for valid registered formatters
for (int i = 0; i < FormatterInfos.Count; i++)
{
var info = FormatterInfos[i];
Type formatterType = null;
if (type == info.TargetType)
{
formatterType = info.FormatterType;
}
else if (info.FormatterType.IsGenericType && info.TargetType.IsGenericParameter)
{
Type[] inferredArgs;
if (info.FormatterType.TryInferGenericParameters(out inferredArgs, type))
{
formatterType = info.FormatterType.GetGenericTypeDefinition().MakeGenericType(inferredArgs);
}
}
else if (type.IsGenericType && info.FormatterType.IsGenericType && info.TargetType.IsGenericType && type.GetGenericTypeDefinition() == info.TargetType.GetGenericTypeDefinition())
{
Type[] args = type.GetGenericArguments();
if (info.FormatterType.AreGenericConstraintsSatisfiedBy(args))
{
formatterType = info.FormatterType.GetGenericTypeDefinition().MakeGenericType(args);
}
}
if (formatterType != null)
{
var instance = GetFormatterInstance(formatterType);
if (instance == null)
{
continue;
}
if (info.AskIfCanFormatTypes && !((IAskIfCanFormatTypes)instance).CanFormatType(type))
{
continue;
}
return(instance);
}
}
// Then call formatter locators after checking for registered formatters
for (int i = 0; i < FormatterLocators.Count; i++)
{
try
{
IFormatter result;
if (FormatterLocators[i].LocatorInstance.TryGetFormatter(type, FormatterLocationStep.AfterRegisteredFormatters, policy, out result))
{
return(result);
}
}
catch (TargetInvocationException ex)
{
throw ex;
}
catch (TypeInitializationException ex)
{
throw ex;
}
#pragma warning disable CS0618 // Type or member is obsolete
catch (ExecutionEngineException ex)
#pragma warning restore CS0618 // Type or member is obsolete
{
throw ex;
}
catch (Exception ex)
{
Debug.LogException(new Exception("Exception was thrown while calling FormatterLocator " + FormatterLocators[i].GetType().FullName + ".", ex));
}
}
// If we can, emit a formatter to handle serialization of this object
{
if (EmitUtilities.CanEmit)
{
var result = FormatterEmitter.GetEmittedFormatter(type, policy);
if (result != null)
{
return(result);
}
}
}
if (EmitUtilities.CanEmit)
{
Debug.LogWarning("Fallback to reflection for type " + type.Name + " when emit is possible on this platform.");
}
// Finally, we fall back to a reflection-based formatter if nothing else has been found
return((IFormatter)Activator.CreateInstance(typeof(ReflectionFormatter <>).MakeGenericType(type)));
}
/// <summary>
/// Writes a value of type <see cref="T" />.
/// </summary>
/// <param name="name">The name of the value to write.</param>
/// <param name="value">The value to write.</param>
/// <param name="writer">The writer to use.</param>
public override void WriteValue(string name, T value, IDataWriter writer)
{
var context = writer.Context;
if (context.Config.SerializationPolicy.AllowNonSerializableTypes == false && typeof(T).IsSerializable == false)
{
context.Config.DebugContext.LogError("The type " + typeof(T).Name + " is not marked as serializable.");
return;
}
FireOnSerializedType();
if (ComplexTypeIsValueType)
{
bool endNode = true;
try
{
writer.BeginStructNode(name, typeof(T));
FormatterLocator.GetFormatter <T>(context.Config.SerializationPolicy).Serialize(value, writer);
}
catch (SerializationAbortException ex)
{
endNode = false;
throw ex;
}
finally
{
if (endNode)
{
writer.EndNode(name);
}
}
}
else
{
int id;
int index;
string strId;
Guid guid;
bool endNode = true;
if (object.ReferenceEquals(value, null))
{
writer.WriteNull(name);
}
else if (context.TryRegisterExternalReference(value, out index))
{
writer.WriteExternalReference(name, index);
}
else if (context.TryRegisterExternalReference(value, out guid))
{
writer.WriteExternalReference(name, guid);
}
else if (context.TryRegisterExternalReference(value, out strId))
{
writer.WriteExternalReference(name, strId);
}
else if (context.TryRegisterInternalReference(value, out id))
{
Type type = value.GetType(); // Get type of actual stored object
if (ComplexTypeMayBeBoxedValueType && FormatterUtilities.IsPrimitiveType(type)) // It's a boxed primitive type
{
try
{
writer.BeginReferenceNode(name, type, id);
var serializer = Serializer.Get(type);
serializer.WriteValueWeak(value, writer);
}
catch (SerializationAbortException ex)
{
endNode = false;
throw ex;
}
finally
{
if (endNode)
{
writer.EndNode(name);
}
}
}
else
{
var formatter = FormatterLocator.GetFormatter(type, context.Config.SerializationPolicy);
try
{
writer.BeginReferenceNode(name, type, id);
formatter.Serialize(value, writer);
}
catch (SerializationAbortException ex)
{
endNode = false;
throw ex;
}
finally
{
if (endNode)
{
writer.EndNode(name);
}
}
}
}
else
{
writer.WriteInternalReference(name, id);
}
}
}
/// <summary>
/// Skips the next entry value, unless it is an <see cref="EntryType.EndOfNode"/> or an <see cref="EntryType.EndOfArray"/>. If the next entry value is an <see cref="EntryType.StartOfNode"/> or an <see cref="EntryType.StartOfArray"/>, all of its contents will be processed, deserialized and registered in the deserialization context, so that internal reference values are not lost to entries further down the stream.
/// </summary>
public virtual void SkipEntry()
{
var peekedEntry = this.PeekEntry();
if (peekedEntry == EntryType.StartOfNode)
{
Type type;
bool exitNode = true;
this.EnterNode(out type);
try
{
if (type != null)
{
// We have the necessary metadata to read this type, and register all of its reference values (perhaps including itself) in the serialization context
// Sadly, we have no choice but to risk boxing of structs here
// Luckily, this is a rare case
if (FormatterUtilities.IsPrimitiveType(type))
{
// It is a boxed primitive type; we read the value and register it
var serializer = Serializer.Get(type);
object value = serializer.ReadValueWeak(this);
if (this.CurrentNodeId >= 0)
{
this.Context.RegisterInternalReference(this.CurrentNodeId, value);
}
}
else
{
var formatter = FormatterLocator.GetFormatter(type, this.Context.Config.SerializationPolicy);
object value = formatter.Deserialize(this);
if (this.CurrentNodeId >= 0)
{
this.Context.RegisterInternalReference(this.CurrentNodeId, value);
}
}
}
else
{
// We have no metadata, and reference values might be lost
// We must read until a node on the same level terminates
while (true)
{
peekedEntry = this.PeekEntry();
if (peekedEntry == EntryType.EndOfStream)
{
break;
}
else if (peekedEntry == EntryType.EndOfNode)
{
break;
}
else if (peekedEntry == EntryType.EndOfArray)
{
this.ReadToNextEntry(); // Consume end of arrays that we can potentially get stuck on
}
else
{
this.SkipEntry();
}
}
}
}
catch (SerializationAbortException ex)
{
exitNode = false;
throw ex;
}
finally
{
if (exitNode)
{
this.ExitNode();
}
}
}
else if (peekedEntry == EntryType.StartOfArray)
{
// We must read until an array on the same level terminates
this.ReadToNextEntry(); // Consume start of array
while (true)
{
peekedEntry = this.PeekEntry();
if (peekedEntry == EntryType.EndOfStream)
{
break;
}
else if (peekedEntry == EntryType.EndOfArray)
{
this.ReadToNextEntry(); // Consume end of array and break
break;
}
else if (peekedEntry == EntryType.EndOfNode)
{
this.ReadToNextEntry(); // Consume end of nodes that we can potentially get stuck on
}
else
{
this.SkipEntry();
}
}
}
else if (peekedEntry != EntryType.EndOfArray && peekedEntry != EntryType.EndOfNode) // We can't skip end of arrays and end of nodes
{
this.ReadToNextEntry(); // We can just skip a single value entry
}
}
/// <summary>
/// Reads a value of type <see cref="T" />.
/// </summary>
/// <param name="reader">The reader to use.</param>
/// <returns>
/// The value which has been read.
/// </returns>
public override T ReadValue(IDataReader reader)
{
var context = reader.Context;
if (context.Config.SerializationPolicy.AllowNonSerializableTypes == false && typeof(T).IsSerializable == false)
{
context.Config.DebugContext.LogError("The type " + typeof(T).Name + " is not marked as serializable.");
return(default(T));
}
bool exitNode = true;
string name;
var entry = reader.PeekEntry(out name);
if (ComplexTypeIsValueType)
{
if (entry == EntryType.Null)
{
context.Config.DebugContext.LogWarning("Expecting complex struct of type " + typeof(T).GetNiceFullName() + " but got null value.");
reader.ReadNull();
return(default(T));
}
else if (entry != EntryType.StartOfNode)
{
context.Config.DebugContext.LogWarning("Unexpected entry '" + name + "' of type " + entry.ToString() + ", when " + EntryType.StartOfNode + " was expected. A value has likely been lost.");
reader.SkipEntry();
return(default(T));
}
try
{
Type expectedType = typeof(T);
Type serializedType;
if (reader.EnterNode(out serializedType))
{
if (serializedType != expectedType)
{
if (serializedType != null)
{
context.Config.DebugContext.LogWarning("Expected complex struct value " + expectedType.Name + " but the serialized value is of type " + serializedType.Name + ".");
if (serializedType.IsCastableTo(expectedType))
{
object value = FormatterLocator.GetFormatter(serializedType, context.Config.SerializationPolicy).Deserialize(reader);
bool serializedTypeIsNullable = serializedType.IsGenericType && serializedType.GetGenericTypeDefinition() == typeof(Nullable <>);
bool allowCastMethod = !ComplexTypeIsNullable && !serializedTypeIsNullable;
var castMethod = allowCastMethod ? serializedType.GetCastMethodDelegate(expectedType) : null;
if (castMethod != null)
{
return((T)castMethod(value));
}
else
{
return((T)value);
}
}
else if (AllowDeserializeInvalidDataForT || reader.Context.Config.AllowDeserializeInvalidData)
{
context.Config.DebugContext.LogWarning("Can't cast serialized type " + serializedType.Name + " into expected type " + expectedType.Name + ". Attempting to deserialize with possibly invalid data. Value may be lost or corrupted for node '" + name + "'.");
return(FormatterLocator.GetFormatter <T>(context.Config.SerializationPolicy).Deserialize(reader));
}
else
{
context.Config.DebugContext.LogWarning("Can't cast serialized type " + serializedType.Name + " into expected type " + expectedType.Name + ". Value lost for node '" + name + "'.");
return(default(T));
}
}
else if (AllowDeserializeInvalidDataForT || reader.Context.Config.AllowDeserializeInvalidData)
{
context.Config.DebugContext.LogWarning("Expected complex struct value " + expectedType.Name + " but the serialized type could not be resolved. Attempting to deserialize with possibly invalid data. Value may be lost or corrupted for node '" + name + "'.");
return(FormatterLocator.GetFormatter <T>(context.Config.SerializationPolicy).Deserialize(reader));
}
else
{
context.Config.DebugContext.LogWarning("Expected complex struct value " + expectedType.Name + " but the serialized type could not be resolved. Value lost for node '" + name + "'.");
return(default(T));
}
}
else
{
return(FormatterLocator.GetFormatter <T>(context.Config.SerializationPolicy).Deserialize(reader));
}
}
else
{
context.Config.DebugContext.LogError("Failed to enter node '" + name + "'.");
return(default(T));
}
}
catch (SerializationAbortException ex)
{
exitNode = false;
throw ex;
}
catch (Exception ex)
{
context.Config.DebugContext.LogException(ex);
return(default(T));
}
finally
{
if (exitNode)
{
reader.ExitNode();
}
}
}
else
{
switch (entry)
{
case EntryType.Null:
{
reader.ReadNull();
return(default(T));
}
case EntryType.ExternalReferenceByIndex:
{
int index;
reader.ReadExternalReference(out index);
object value = context.GetExternalObject(index);
try
{
return((T)value);
}
catch (InvalidCastException)
{
context.Config.DebugContext.LogWarning("Can't cast external reference type " + value.GetType().Name + " into expected type " + typeof(T).Name + ". Value lost for node '" + name + "'.");
return(default(T));
}
}
case EntryType.ExternalReferenceByGuid:
{
Guid guid;
reader.ReadExternalReference(out guid);
object value = context.GetExternalObject(guid);
try
{
return((T)value);
}
catch (InvalidCastException)
{
context.Config.DebugContext.LogWarning("Can't cast external reference type " + value.GetType().Name + " into expected type " + typeof(T).Name + ". Value lost for node '" + name + "'.");
return(default(T));
}
}
case EntryType.ExternalReferenceByString:
{
string id;
reader.ReadExternalReference(out id);
object value = context.GetExternalObject(id);
try
{
return((T)value);
}
catch (InvalidCastException)
{
context.Config.DebugContext.LogWarning("Can't cast external reference type " + value.GetType().Name + " into expected type " + typeof(T).Name + ". Value lost for node '" + name + "'.");
return(default(T));
}
}
case EntryType.InternalReference:
{
int id;
reader.ReadInternalReference(out id);
object value = context.GetInternalReference(id);
try
{
return((T)value);
}
catch (InvalidCastException)
{
context.Config.DebugContext.LogWarning("Can't cast internal reference type " + value.GetType().Name + " into expected type " + typeof(T).Name + ". Value lost for node '" + name + "'.");
return(default(T));
}
}
case EntryType.StartOfNode:
{
try
{
Type expectedType = typeof(T);
Type serializedType;
int id;
if (reader.EnterNode(out serializedType))
{
id = reader.CurrentNodeId;
T result;
if (serializedType != null && expectedType != serializedType) // We have type metadata different from the expected type
{
bool success = false;
var isPrimitive = FormatterUtilities.IsPrimitiveType(serializedType);
bool assignableCast;
if (ComplexTypeMayBeBoxedValueType && isPrimitive)
{
// It's a boxed primitive type, so simply read that straight and register success
var serializer = Serializer.Get(serializedType);
result = (T)serializer.ReadValueWeak(reader);
success = true;
}
else if ((assignableCast = expectedType.IsAssignableFrom(serializedType)) || serializedType.HasCastDefined(expectedType, false))
{
try
{
object value;
if (isPrimitive)
{
var serializer = Serializer.Get(serializedType);
value = serializer.ReadValueWeak(reader);
}
else
{
var alternateFormatter = FormatterLocator.GetFormatter(serializedType, context.Config.SerializationPolicy);
value = alternateFormatter.Deserialize(reader);
}
if (assignableCast)
{
result = (T)value;
}
else
{
var castMethod = serializedType.GetCastMethodDelegate(expectedType);
if (castMethod != null)
{
result = (T)castMethod(value);
}
else
{
// Let's just give it a go anyways
result = (T)value;
}
}
success = true;
}
catch (SerializationAbortException ex)
{
exitNode = false;
throw ex;
}
catch (InvalidCastException)
{
success = false;
result = default(T);
}
}
else if (!ComplexTypeIsAbstract && (AllowDeserializeInvalidDataForT || reader.Context.Config.AllowDeserializeInvalidData))
{
// We will try to deserialize an instance of T with the invalid data.
context.Config.DebugContext.LogWarning("Can't cast serialized type " + serializedType.Name + " into expected type " + expectedType.Name + ". Attempting to deserialize with invalid data. Value may be lost or corrupted for node '" + name + "'.");
result = FormatterLocator.GetFormatter <T>(context.Config.SerializationPolicy).Deserialize(reader);
success = true;
}
else
{
// We couldn't cast or use the type, but we still have to deserialize it and register
// the reference so the reference isn't lost if it is referred to further down
// the data stream.
var alternateFormatter = FormatterLocator.GetFormatter(serializedType, context.Config.SerializationPolicy);
object value = alternateFormatter.Deserialize(reader);
if (id >= 0)
{
context.RegisterInternalReference(id, value);
}
result = default(T);
}
if (!success)
{
// We can't use this
context.Config.DebugContext.LogWarning("Can't cast serialized type " + serializedType.Name + " into expected type " + expectedType.Name + ". Value lost for node '" + name + "'.");
result = default(T);
}
}
else if (ComplexTypeIsAbstract)
{
result = default(T);
}
else
{
result = FormatterLocator.GetFormatter <T>(context.Config.SerializationPolicy).Deserialize(reader);
}
if (id >= 0)
{
context.RegisterInternalReference(id, result);
}
return(result);
}
else
{
context.Config.DebugContext.LogError("Failed to enter node '" + name + "'.");
return(default(T));
}
}
catch (SerializationAbortException ex)
{
exitNode = false;
throw ex;
}
catch (Exception ex)
{
context.Config.DebugContext.LogException(ex);
return(default(T));
}
finally
{
if (exitNode)
{
reader.ExitNode();
}
}
}
//
// The below cases are for when we expect an object, but have
// serialized a straight primitive type. In such cases, we can
// often box the primitive type as an object.
//
// Sadly, the exact primitive type might be lost in case of
// integer and floating points numbers, as we don't know what
// type to expect.
//
// To be safe, we read and box the most precise type available.
//
case EntryType.Boolean:
{
if (!ComplexTypeMayBeBoxedValueType)
{
goto default;
}
bool value;
reader.ReadBoolean(out value);
return((T)(object)value);
}
case EntryType.FloatingPoint:
{
if (!ComplexTypeMayBeBoxedValueType)
{
goto default;
}
double value;
reader.ReadDouble(out value);
return((T)(object)value);
}
case EntryType.Integer:
{
if (!ComplexTypeMayBeBoxedValueType)
{
goto default;
}
long value;
reader.ReadInt64(out value);
return((T)(object)value);
}
case EntryType.String:
{
if (!ComplexTypeMayBeBoxedValueType)
{
goto default;
}
string value;
reader.ReadString(out value);
return((T)(object)value);
}
case EntryType.Guid:
{
if (!ComplexTypeMayBeBoxedValueType)
{
goto default;
}
Guid value;
reader.ReadGuid(out value);
return((T)(object)value);
}
default:
// Lost value somehow
context.Config.DebugContext.LogWarning("Unexpected entry of type " + entry.ToString() + ", when a reference or node start was expected. A value has been lost.");
reader.SkipEntry();
return(default(T));
}
}
}