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>
/// 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>
/// 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);
}