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DynamicObjectResolver.cs
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DynamicObjectResolver.cs
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using System;
using System.Linq;
using MessagePack.Formatters;
using MessagePack.Internal;
using System.Reflection;
using System.Reflection.Emit;
using System.Collections.Generic;
namespace MessagePack.Resolvers
{
/// <summary>
/// ObjectResolver by dynamic code generation.
/// </summary>
public class DynamicObjectResolver : IFormatterResolver
{
public static DynamicObjectResolver Instance = new DynamicObjectResolver();
const string ModuleName = "MessagePack.Resolvers.DynamicObjectResolver";
internal static readonly DynamicAssembly assembly;
DynamicObjectResolver()
{
}
static DynamicObjectResolver()
{
assembly = new DynamicAssembly(ModuleName);
}
#if NET_35
public AssemblyBuilder Save()
{
return assembly.Save();
}
#endif
public IMessagePackFormatter<T> GetFormatter<T>()
{
return FormatterCache<T>.formatter;
}
static class FormatterCache<T>
{
public static readonly IMessagePackFormatter<T> formatter;
static FormatterCache()
{
var ti = typeof(T).GetTypeInfo();
if (ti.IsNullable())
{
ti = ti.GenericTypeArguments[0].GetTypeInfo();
var innerFormatter = DynamicObjectResolver.Instance.GetFormatterDynamic(ti.AsType());
if (innerFormatter == null)
{
return;
}
formatter = (IMessagePackFormatter<T>)Activator.CreateInstance(typeof(StaticNullableFormatter<>).MakeGenericType(ti.AsType()), new object[] { innerFormatter });
return;
}
var formatterTypeInfo = DynamicObjectTypeBuilder.BuildType(assembly, typeof(T), false);
if (formatterTypeInfo == null) return;
formatter = (IMessagePackFormatter<T>)Activator.CreateInstance(formatterTypeInfo.AsType());
}
}
}
/// <summary>
/// ObjectResolver by dynamic code generation, no needs MessagePackObject attribute and serialized key as string.
/// </summary>
public class DynamicContractlessObjectResolver : IFormatterResolver
{
public static DynamicContractlessObjectResolver Instance = new DynamicContractlessObjectResolver();
const string ModuleName = "MessagePack.Resolvers.DynamicContractlessObjectResolver";
static readonly DynamicAssembly assembly;
DynamicContractlessObjectResolver()
{
}
static DynamicContractlessObjectResolver()
{
assembly = new DynamicAssembly(ModuleName);
}
#if NET_35
public void Save()
{
assembly.Save();
}
#endif
public IMessagePackFormatter<T> GetFormatter<T>()
{
return FormatterCache<T>.formatter;
}
static class FormatterCache<T>
{
public static readonly IMessagePackFormatter<T> formatter;
static FormatterCache()
{
var ti = typeof(T).GetTypeInfo();
if (ti.IsNullable())
{
ti = ti.GenericTypeArguments[0].GetTypeInfo();
var innerFormatter = DynamicObjectResolver.Instance.GetFormatterDynamic(ti.AsType());
if (innerFormatter == null)
{
return;
}
formatter = (IMessagePackFormatter<T>)Activator.CreateInstance(typeof(StaticNullableFormatter<>).MakeGenericType(ti.AsType()), new object[] { innerFormatter });
return;
}
if (!ti.IsPublic && ti.IsClass)
{
formatter = (IMessagePackFormatter<T>)DynamicPrivateFormatterBuilder.BuildFormatter(typeof(T));
return;
}
var formatterTypeInfo = DynamicObjectTypeBuilder.BuildType(assembly, typeof(T), true); // true.
if (formatterTypeInfo == null) return;
formatter = (IMessagePackFormatter<T>)Activator.CreateInstance(formatterTypeInfo.AsType());
}
}
}
}
namespace MessagePack.Internal
{
internal static class DynamicObjectTypeBuilder
{
public static TypeInfo BuildType(DynamicAssembly assembly, Type type, bool forceStringKey)
{
var serializationInfo = MessagePack.Internal.ObjectSerializationInfo.CreateOrNull(type, forceStringKey);
if (serializationInfo == null) return null;
var formatterType = typeof(IMessagePackFormatter<>).MakeGenericType(type);
var typeBuilder = assembly.ModuleBuilder.DefineType("MessagePack.Formatters." + type.FullName.Replace(".", "_") + "Formatter", TypeAttributes.Public | TypeAttributes.Sealed, null, new[] { formatterType });
FieldBuilder dictionaryField = null;
// string key needs string->int mapper for deserialize switch statement
if (serializationInfo.IsStringKey)
{
var method = typeBuilder.DefineConstructor(MethodAttributes.Public, CallingConventions.Standard, Type.EmptyTypes);
dictionaryField = typeBuilder.DefineField("keyMapping", typeof(Dictionary<string, int>), FieldAttributes.Private | FieldAttributes.InitOnly);
var il = method.GetILGenerator();
BuildConstructor(type, serializationInfo, method, dictionaryField, il);
}
{
var method = typeBuilder.DefineMethod("Serialize", MethodAttributes.Public | MethodAttributes.Final | MethodAttributes.Virtual,
typeof(int),
new Type[] { typeof(byte[]).MakeByRefType(), typeof(int), type, typeof(IFormatterResolver) });
var il = method.GetILGenerator();
BuildSerialize(type, serializationInfo, method, il);
}
{
var method = typeBuilder.DefineMethod("Deserialize", MethodAttributes.Public | MethodAttributes.Final | MethodAttributes.Virtual,
type,
new Type[] { typeof(byte[]), typeof(int), typeof(IFormatterResolver), typeof(int).MakeByRefType() });
var il = method.GetILGenerator();
BuildDeserialize(type, serializationInfo, method, dictionaryField, il);
}
return typeBuilder.CreateTypeInfo();
}
static void BuildConstructor(Type type, ObjectSerializationInfo info, ConstructorInfo method, FieldBuilder dictionaryField, ILGenerator il)
{
il.EmitLdarg(0);
il.Emit(OpCodes.Call, objectCtor);
il.EmitLdarg(0);
il.EmitLdc_I4(info.Members.Length);
il.Emit(OpCodes.Newobj, dictionaryConstructor);
foreach (var item in info.Members)
{
il.Emit(OpCodes.Dup);
il.Emit(OpCodes.Ldstr, item.StringKey);
il.EmitLdc_I4(item.IntKey);
il.EmitCall(dictionaryAdd);
}
il.Emit(OpCodes.Stfld, dictionaryField);
il.Emit(OpCodes.Ret);
}
// int Serialize([arg:1]ref byte[] bytes, [arg:2]int offset, [arg:3]T value, [arg:4]IFormatterResolver formatterResolver);
static void BuildSerialize(Type type, ObjectSerializationInfo info, MethodInfo method, ILGenerator il)
{
// if(value == null) return WriteNil
if (type.GetTypeInfo().IsClass)
{
var elseBody = il.DefineLabel();
il.EmitLdarg(3);
il.Emit(OpCodes.Brtrue_S, elseBody);
il.EmitLdarg(1);
il.EmitLdarg(2);
il.EmitCall(MessagePackBinaryTypeInfo.WriteNil);
il.Emit(OpCodes.Ret);
il.MarkLabel(elseBody);
}
// IMessagePackSerializationCallbackReceiver.OnBeforeSerialize()
if (type.GetTypeInfo().ImplementedInterfaces.Any(x => x == typeof(IMessagePackSerializationCallbackReceiver)))
{
// call directly
var runtimeMethods = type.GetRuntimeMethods().Where(x => x.Name == "OnBeforeSerialize").ToArray();
if (runtimeMethods.Length == 1)
{
if (info.IsStruct)
{
il.EmitLdarga(3);
}
else
{
il.EmitLdarg(3);
}
il.Emit(OpCodes.Call, runtimeMethods[0]); // don't use EmitCall helper(must use 'Call')
}
else
{
il.EmitLdarg(3);
if (info.IsStruct)
{
il.Emit(OpCodes.Box, type);
}
il.EmitCall(onBeforeSerialize);
}
}
// var startOffset = offset;
var startOffsetLocal = il.DeclareLocal(typeof(int)); // [loc:0]
il.EmitLdarg(2);
il.EmitStloc(startOffsetLocal);
if (info.IsIntKey)
{
// use Array
var maxKey = info.Members.Where(x => x.IsReadable).Select(x => x.IntKey).DefaultIfEmpty(0).Max();
var intKeyMap = info.Members.Where(x => x.IsReadable).ToDictionary(x => x.IntKey);
EmitOffsetPlusEqual(il, null, () =>
{
var len = maxKey + 1;
il.EmitLdc_I4(len);
if (len <= MessagePackRange.MaxFixArrayCount)
{
il.EmitCall(MessagePackBinaryTypeInfo.WriteFixedArrayHeaderUnsafe);
}
else
{
il.EmitCall(MessagePackBinaryTypeInfo.WriteArrayHeader);
}
});
for (int i = 0; i <= maxKey; i++)
{
ObjectSerializationInfo.EmittableMember member;
if (intKeyMap.TryGetValue(i, out member))
{
// offset += serialzie
EmitSerializeValue(il, type.GetTypeInfo(), member);
}
else
{
// Write Nil as Blanc
EmitOffsetPlusEqual(il, null, () =>
{
il.EmitCall(MessagePackBinaryTypeInfo.WriteNil);
});
}
}
}
else
{
// use Map
var writeCount = info.Members.Count(x => x.IsReadable);
EmitOffsetPlusEqual(il, null, () =>
{
il.EmitLdc_I4(writeCount);
if (writeCount <= MessagePackRange.MaxFixMapCount)
{
il.EmitCall(MessagePackBinaryTypeInfo.WriteFixedMapHeaderUnsafe);
}
else
{
il.EmitCall(MessagePackBinaryTypeInfo.WriteMapHeader);
}
});
foreach (var item in info.Members.Where(x => x.IsReadable))
{
// offset += writekey
if (info.IsStringKey)
{
EmitOffsetPlusEqual(il, null, () =>
{
// embed string and bytesize
il.Emit(OpCodes.Ldstr, item.StringKey);
il.EmitLdc_I4(StringEncoding.UTF8.GetByteCount(item.StringKey));
il.EmitCall(MessagePackBinaryTypeInfo.WriteStringUnsafe);
});
}
// offset += serialzie
EmitSerializeValue(il, type.GetTypeInfo(), item);
}
}
// return startOffset- offset;
il.EmitLdarg(2);
il.EmitLdloc(startOffsetLocal);
il.Emit(OpCodes.Sub);
il.Emit(OpCodes.Ret);
}
// offset += ***(ref bytes, offset....
static void EmitOffsetPlusEqual(ILGenerator il, Action loadEmit, Action emit)
{
il.EmitLdarg(2);
if (loadEmit != null) loadEmit();
il.EmitLdarg(1);
il.EmitLdarg(2);
emit();
il.Emit(OpCodes.Add);
il.EmitStarg(2);
}
static void EmitSerializeValue(ILGenerator il, TypeInfo type, ObjectSerializationInfo.EmittableMember member)
{
var t = member.Type;
if (MessagePackBinary.IsMessagePackPrimitive(t))
{
EmitOffsetPlusEqual(il, null, () =>
{
il.EmitLoadArg(type, 3);
member.EmitLoadValue(il);
if (t == typeof(byte[]))
{
il.EmitCall(MessagePackBinaryTypeInfo.WriteBytes);
}
else
{
il.EmitCall(MessagePackBinaryTypeInfo.TypeInfo.GetDeclaredMethod("Write" + t.Name));
}
});
}
else
{
EmitOffsetPlusEqual(il, () =>
{
il.EmitLdarg(4);
il.Emit(OpCodes.Call, getFormatterWithVerify.MakeGenericMethod(t));
}, () =>
{
il.EmitLoadArg(type, 3);
member.EmitLoadValue(il);
il.EmitLdarg(4);
il.EmitCall(getSerialize(t));
});
}
}
// T Deserialize([arg:1]byte[] bytes, [arg:2]int offset, [arg:3]IFormatterResolver formatterResolver, [arg:4]out int readSize);
static void BuildDeserialize(Type type, ObjectSerializationInfo info, MethodBuilder method, FieldBuilder dictionaryField, ILGenerator il)
{
// if(MessagePackBinary.IsNil) readSize = 1, return null;
var falseLabel = il.DefineLabel();
il.EmitLdarg(1);
il.EmitLdarg(2);
il.EmitCall(MessagePackBinaryTypeInfo.IsNil);
il.Emit(OpCodes.Brfalse_S, falseLabel);
if (type.GetTypeInfo().IsClass)
{
il.EmitLdarg(4);
il.EmitLdc_I4(1);
il.Emit(OpCodes.Stind_I4);
il.Emit(OpCodes.Ldnull);
il.Emit(OpCodes.Ret);
}
else
{
il.Emit(OpCodes.Ldstr, "typecode is null, struct not supported");
il.Emit(OpCodes.Newobj, invalidOperationExceptionConstructor);
il.Emit(OpCodes.Throw);
}
// var startOffset = offset;
il.MarkLabel(falseLabel);
var startOffsetLocal = il.DeclareLocal(typeof(int)); // [loc:0]
il.EmitLdarg(2);
il.EmitStloc(startOffsetLocal);
// var length = ReadMapHeader
var length = il.DeclareLocal(typeof(int)); // [loc:1]
il.EmitLdarg(1);
il.EmitLdarg(2);
il.EmitLdarg(4);
if (info.IsIntKey)
{
il.EmitCall(MessagePackBinaryTypeInfo.ReadArrayHeader);
}
else
{
il.EmitCall(MessagePackBinaryTypeInfo.ReadMapHeader);
}
il.EmitStloc(length);
EmitOffsetPlusReadSize(il);
// make local fields
Label? gotoDefault = null;
DeserializeInfo[] infoList;
if (info.IsIntKey)
{
var maxKey = info.Members.Select(x => x.IntKey).DefaultIfEmpty(0).Max();
var len = maxKey + 1;
var intKeyMap = info.Members.ToDictionary(x => x.IntKey);
infoList = Enumerable.Range(0, len)
.Select(x =>
{
ObjectSerializationInfo.EmittableMember member;
if (intKeyMap.TryGetValue(x, out member))
{
return new DeserializeInfo
{
MemberInfo = member,
LocalField = il.DeclareLocal(member.Type),
SwitchLabel = il.DefineLabel()
};
}
else
{
// return null MemberInfo, should filter null
if (gotoDefault == null)
{
gotoDefault = il.DefineLabel();
}
return new DeserializeInfo
{
MemberInfo = null,
LocalField = null,
SwitchLabel = gotoDefault.Value,
};
}
})
.ToArray();
}
else
{
infoList = info.Members
.Select(item => new DeserializeInfo
{
MemberInfo = item,
LocalField = il.DeclareLocal(item.Type),
SwitchLabel = il.DefineLabel()
})
.ToArray();
}
// Read Loop(for var i = 0; i< length; i++)
{
var key = il.DeclareLocal(typeof(int));
var switchDefault = il.DefineLabel();
var loopEnd = il.DefineLabel();
var stringKeyTrue = il.DefineLabel();
il.EmitIncrementFor(length, forILocal =>
{
if (info.IsStringKey)
{
// get string key -> dictionary lookup
il.EmitLdarg(0);
il.Emit(OpCodes.Ldfld, dictionaryField);
il.EmitLdarg(1);
il.EmitLdarg(2);
il.EmitLdarg(4);
il.EmitCall(MessagePackBinaryTypeInfo.ReadString);
il.EmitLdloca(key);
il.EmitCall(dictionaryTryGetValue);
EmitOffsetPlusReadSize(il);
il.Emit(OpCodes.Brtrue_S, stringKeyTrue);
il.EmitLdarg(4);
il.EmitLdarg(1);
il.EmitLdarg(2);
il.EmitCall(MessagePackBinaryTypeInfo.ReadNextBlock);
il.Emit(OpCodes.Stind_I4);
il.Emit(OpCodes.Br, loopEnd);
il.MarkLabel(stringKeyTrue);
}
else
{
il.EmitLdloc(forILocal);
il.EmitStloc(key);
}
// switch... local = Deserialize
il.EmitLdloc(key);
il.Emit(OpCodes.Switch, infoList.Select(x => x.SwitchLabel).ToArray());
il.MarkLabel(switchDefault);
// default, only read. readSize = MessagePackBinary.ReadNextBlock(bytes, offset);
il.EmitLdarg(4);
il.EmitLdarg(1);
il.EmitLdarg(2);
il.EmitCall(MessagePackBinaryTypeInfo.ReadNextBlock);
il.Emit(OpCodes.Stind_I4);
il.Emit(OpCodes.Br, loopEnd);
if (gotoDefault != null)
{
il.MarkLabel(gotoDefault.Value);
il.Emit(OpCodes.Br, switchDefault);
}
foreach (var item in infoList)
{
if (item.MemberInfo != null)
{
il.MarkLabel(item.SwitchLabel);
EmitDeserializeValue(il, item);
il.Emit(OpCodes.Br, loopEnd);
}
}
// offset += readSize
il.MarkLabel(loopEnd);
EmitOffsetPlusReadSize(il);
});
}
// finish readSize: readSize = offset - startOffset;
il.EmitLdarg(4);
il.EmitLdarg(2);
il.EmitLdloc(startOffsetLocal);
il.Emit(OpCodes.Sub);
il.Emit(OpCodes.Stind_I4);
// create result object
var structLocal = EmitNewObject(il, type, info, infoList);
// IMessagePackSerializationCallbackReceiver.OnAfterDeserialize()
if (type.GetTypeInfo().ImplementedInterfaces.Any(x => x == typeof(IMessagePackSerializationCallbackReceiver)))
{
// call directly
var runtimeMethods = type.GetRuntimeMethods().Where(x => x.Name == "OnAfterDeserialize").ToArray();
if (runtimeMethods.Length == 1)
{
if (info.IsClass)
{
il.Emit(OpCodes.Dup);
}
else
{
il.EmitLdloca(structLocal);
}
il.Emit(OpCodes.Call, runtimeMethods[0]); // don't use EmitCall helper(must use 'Call')
}
else
{
if (info.IsStruct)
{
il.EmitLdloc(structLocal);
il.Emit(OpCodes.Box, type);
}
else
{
il.Emit(OpCodes.Dup);
}
il.EmitCall(onAfterDeserialize);
}
}
if (info.IsStruct)
{
il.Emit(OpCodes.Ldloc, structLocal);
}
il.Emit(OpCodes.Ret);
}
static void EmitOffsetPlusReadSize(ILGenerator il)
{
il.EmitLdarg(2);
il.EmitLdarg(4);
il.Emit(OpCodes.Ldind_I4);
il.Emit(OpCodes.Add);
il.EmitStarg(2);
}
static void EmitDeserializeValue(ILGenerator il, DeserializeInfo info)
{
var member = info.MemberInfo;
var t = member.Type;
if (MessagePackBinary.IsMessagePackPrimitive(t))
{
il.EmitLdarg(1);
il.EmitLdarg(2);
il.EmitLdarg(4);
if (t == typeof(byte[]))
{
il.EmitCall(MessagePackBinaryTypeInfo.ReadBytes);
}
else
{
il.EmitCall(MessagePackBinaryTypeInfo.TypeInfo.GetDeclaredMethod("Read" + t.Name));
}
}
else
{
il.EmitLdarg(3);
il.EmitCall(getFormatterWithVerify.MakeGenericMethod(t));
il.EmitLdarg(1);
il.EmitLdarg(2);
il.EmitLdarg(3);
il.EmitLdarg(4);
il.EmitCall(getDeserialize(t));
}
il.EmitStloc(info.LocalField);
}
static LocalBuilder EmitNewObject(ILGenerator il, Type type, ObjectSerializationInfo info, DeserializeInfo[] members)
{
if (info.IsClass)
{
foreach (var item in info.ConstructorParameters)
{
var local = members.First(x => x.MemberInfo == item);
il.EmitLdloc(local.LocalField);
}
il.Emit(OpCodes.Newobj, info.BestmatchConstructor);
foreach (var item in members.Where(x => x.MemberInfo != null && x.MemberInfo.IsWritable))
{
il.Emit(OpCodes.Dup);
il.EmitLdloc(item.LocalField);
item.MemberInfo.EmitStoreValue(il);
}
return null;
}
else
{
var result = il.DeclareLocal(type);
if (info.BestmatchConstructor == null)
{
il.Emit(OpCodes.Ldloca, result);
il.Emit(OpCodes.Initobj, type);
}
else
{
foreach (var item in info.ConstructorParameters)
{
var local = members.First(x => x.MemberInfo == item);
il.EmitLdloc(local.LocalField);
}
il.Emit(OpCodes.Newobj, info.BestmatchConstructor);
il.Emit(OpCodes.Stloc, result);
}
foreach (var item in members.Where(x => x.MemberInfo != null && x.MemberInfo.IsWritable))
{
il.EmitLdloca(result);
il.EmitLdloc(item.LocalField);
item.MemberInfo.EmitStoreValue(il);
}
return result; // struct returns local result field
}
}
// EmitInfos...
static readonly Type refByte = typeof(byte[]).MakeByRefType();
static readonly Type refInt = typeof(int).MakeByRefType();
static readonly MethodInfo getFormatterWithVerify = typeof(FormatterResolverExtensions).GetRuntimeMethods().First(x => x.Name == "GetFormatterWithVerify");
static readonly Func<Type, MethodInfo> getSerialize = t => typeof(IMessagePackFormatter<>).MakeGenericType(t).GetRuntimeMethod("Serialize", new[] { refByte, typeof(int), t, typeof(IFormatterResolver) });
static readonly Func<Type, MethodInfo> getDeserialize = t => typeof(IMessagePackFormatter<>).MakeGenericType(t).GetRuntimeMethod("Deserialize", new[] { typeof(byte[]), typeof(int), typeof(IFormatterResolver), refInt });
static readonly ConstructorInfo dictionaryConstructor = typeof(Dictionary<string, int>).GetTypeInfo().DeclaredConstructors.First(x => { var p = x.GetParameters(); return p.Length == 1 && p[0].ParameterType == typeof(int); });
static readonly MethodInfo dictionaryAdd = typeof(Dictionary<string, int>).GetRuntimeMethod("Add", new[] { typeof(string), typeof(int) });
static readonly MethodInfo dictionaryTryGetValue = typeof(Dictionary<string, int>).GetRuntimeMethod("TryGetValue", new[] { typeof(string), refInt });
static readonly ConstructorInfo invalidOperationExceptionConstructor = typeof(System.InvalidOperationException).GetTypeInfo().DeclaredConstructors.First(x => { var p = x.GetParameters(); return p.Length == 1 && p[0].ParameterType == typeof(string); });
static readonly MethodInfo onBeforeSerialize = typeof(IMessagePackSerializationCallbackReceiver).GetRuntimeMethod("OnBeforeSerialize", Type.EmptyTypes);
static readonly MethodInfo onAfterDeserialize = typeof(IMessagePackSerializationCallbackReceiver).GetRuntimeMethod("OnAfterDeserialize", Type.EmptyTypes);
static readonly ConstructorInfo objectCtor = typeof(object).GetTypeInfo().DeclaredConstructors.First(x => x.GetParameters().Length == 0);
internal static class MessagePackBinaryTypeInfo
{
public static TypeInfo TypeInfo = typeof(MessagePackBinary).GetTypeInfo();
public static MethodInfo WriteFixedMapHeaderUnsafe = typeof(MessagePackBinary).GetRuntimeMethod("WriteFixedMapHeaderUnsafe", new[] { refByte, typeof(int), typeof(int) });
public static MethodInfo WriteFixedArrayHeaderUnsafe = typeof(MessagePackBinary).GetRuntimeMethod("WriteFixedArrayHeaderUnsafe", new[] { refByte, typeof(int), typeof(int) });
public static MethodInfo WriteMapHeader = typeof(MessagePackBinary).GetRuntimeMethod("WriteMapHeader", new[] { refByte, typeof(int), typeof(int) });
public static MethodInfo WriteArrayHeader = typeof(MessagePackBinary).GetRuntimeMethod("WriteArrayHeader", new[] { refByte, typeof(int), typeof(int) });
public static MethodInfo WritePositiveFixedIntUnsafe = typeof(MessagePackBinary).GetRuntimeMethod("WritePositiveFixedIntUnsafe", new[] { refByte, typeof(int), typeof(int) });
public static MethodInfo WriteInt32 = typeof(MessagePackBinary).GetRuntimeMethod("WriteInt32", new[] { refByte, typeof(int), typeof(int) });
public static MethodInfo WriteBytes = typeof(MessagePackBinary).GetRuntimeMethod("WriteBytes", new[] { refByte, typeof(int), typeof(byte[]) });
public static MethodInfo WriteNil = typeof(MessagePackBinary).GetRuntimeMethod("WriteNil", new[] { refByte, typeof(int) });
public static MethodInfo ReadBytes = typeof(MessagePackBinary).GetRuntimeMethod("ReadBytes", new[] { typeof(byte[]), typeof(int), refInt });
public static MethodInfo ReadInt32 = typeof(MessagePackBinary).GetRuntimeMethod("ReadInt32", new[] { typeof(byte[]), typeof(int), refInt });
public static MethodInfo ReadString = typeof(MessagePackBinary).GetRuntimeMethod("ReadString", new[] { typeof(byte[]), typeof(int), refInt });
public static MethodInfo IsNil = typeof(MessagePackBinary).GetRuntimeMethod("IsNil", new[] { typeof(byte[]), typeof(int) });
public static MethodInfo ReadNextBlock = typeof(MessagePackBinary).GetRuntimeMethod("ReadNextBlock", new[] { typeof(byte[]), typeof(int) });
public static MethodInfo WriteStringUnsafe = typeof(MessagePackBinary).GetRuntimeMethod("WriteStringUnsafe", new[] { refByte, typeof(int), typeof(string), typeof(int) });
public static MethodInfo ReadArrayHeader = typeof(MessagePackBinary).GetRuntimeMethod("ReadArrayHeader", new[] { typeof(byte[]), typeof(int), refInt });
public static MethodInfo ReadMapHeader = typeof(MessagePackBinary).GetRuntimeMethod("ReadMapHeader", new[] { typeof(byte[]), typeof(int), refInt });
static MessagePackBinaryTypeInfo()
{
}
}
class DeserializeInfo
{
public ObjectSerializationInfo.EmittableMember MemberInfo { get; set; }
public LocalBuilder LocalField { get; set; }
public Label SwitchLabel { get; set; }
}
}
internal static class DynamicPrivateFormatterBuilder
{
static readonly Type refByte = typeof(byte[]).MakeByRefType();
static readonly MethodInfo getFormatterWithVerify = typeof(FormatterResolverExtensions).GetRuntimeMethods().First(x => x.Name == "GetFormatterWithVerify");
static readonly Func<Type, MethodInfo> getSerialize = t => typeof(IMessagePackFormatter<>).MakeGenericType(t).GetRuntimeMethod("Serialize", new[] { refByte, typeof(int), t, typeof(IFormatterResolver) });
// Private type formatter can not create by DynamicAssembly but sometimes needs it(anonymous type, etc...)
// use DynamicMethod(skipVisibility:true) can avoid it so use delegation formatter.
public static object BuildFormatter(Type type)
{
var info = ObjectSerializationInfo.CreateOrNull(type, true);
var serialize = new DynamicMethod("Serialize", typeof(int), new[] { typeof(byte[]).MakeByRefType(), typeof(int), type, typeof(IFormatterResolver) }, type, true);
var il = serialize.GetILGenerator();
// Build Serialize(same as DynamicObjectTypeBuilder.BuildSerialize but argument - 1)
{
// if(value == null) return WriteNil
var elseBody = il.DefineLabel();
il.EmitLdarg(2);
il.Emit(OpCodes.Brtrue_S, elseBody);
il.EmitLdarg(0);
il.EmitLdarg(1);
il.EmitCall(DynamicObjectTypeBuilder.MessagePackBinaryTypeInfo.WriteNil);
il.Emit(OpCodes.Ret);
il.MarkLabel(elseBody);
// var startOffset = offset;
var startOffsetLocal = il.DeclareLocal(typeof(int)); // [loc:0]
il.EmitLdarg(1);
il.EmitStloc(startOffsetLocal);
// use only Map!
var writeCount = info.Members.Count(x => x.IsReadable);
EmitOffsetPlusEqual(il, null, () =>
{
il.EmitLdc_I4(writeCount);
if (writeCount <= MessagePackRange.MaxFixMapCount)
{
il.EmitCall(DynamicObjectTypeBuilder.MessagePackBinaryTypeInfo.WriteFixedMapHeaderUnsafe);
}
else
{
il.EmitCall(DynamicObjectTypeBuilder.MessagePackBinaryTypeInfo.WriteMapHeader);
}
});
foreach (var item in info.Members.Where(x => x.IsReadable))
{
// offset += writekey
if (info.IsStringKey)
{
EmitOffsetPlusEqual(il, null, () =>
{
// embed string and bytesize
il.Emit(OpCodes.Ldstr, item.StringKey);
il.EmitLdc_I4(StringEncoding.UTF8.GetByteCount(item.StringKey));
il.EmitCall(DynamicObjectTypeBuilder.MessagePackBinaryTypeInfo.WriteStringUnsafe);
});
}
// offset += serialzie
EmitSerializeValue(il, type.GetTypeInfo(), item);
}
// return startOffset- offset;
il.EmitLdarg(1);
il.EmitLdloc(startOffsetLocal);
il.Emit(OpCodes.Sub);
il.Emit(OpCodes.Ret);
}
var method = serialize.CreateDelegate(typeof(SerializeDelegate<>).MakeGenericType(type));
var formatter = Activator.CreateInstance(typeof(AnonymousSerializableFormatter<>).MakeGenericType(type), new object[] { method });
return formatter;
}
static void EmitOffsetPlusEqual(ILGenerator il, Action loadEmit, Action emit)
{
il.EmitLdarg(1);
if (loadEmit != null) loadEmit();
il.EmitLdarg(0);
il.EmitLdarg(1);
emit();
il.Emit(OpCodes.Add);
il.EmitStarg(1);
}
static void EmitSerializeValue(ILGenerator il, TypeInfo type, ObjectSerializationInfo.EmittableMember member)
{
var t = member.Type;
if (MessagePackBinary.IsMessagePackPrimitive(t))
{
EmitOffsetPlusEqual(il, null, () =>
{
il.EmitLoadArg(type, 2);
member.EmitLoadValue(il);
if (t == typeof(byte[]))
{
il.EmitCall(DynamicObjectTypeBuilder.MessagePackBinaryTypeInfo.WriteBytes);
}
else
{
il.EmitCall(DynamicObjectTypeBuilder.MessagePackBinaryTypeInfo.TypeInfo.GetDeclaredMethod("Write" + t.Name));
}
});
}
else
{
EmitOffsetPlusEqual(il, () =>
{
il.EmitLdarg(3);
il.Emit(OpCodes.Call, getFormatterWithVerify.MakeGenericMethod(t));
}, () =>
{
il.EmitLoadArg(type, 2);
member.EmitLoadValue(il);
il.EmitLdarg(3);
il.EmitCall(getSerialize(t));
});
}
}
}
internal delegate int SerializeDelegate<T>(ref byte[] bytes, int offset, T value, IFormatterResolver formatterResolver);
internal class AnonymousSerializableFormatter<T> : IMessagePackFormatter<T>
{
readonly SerializeDelegate<T> serialize;
public AnonymousSerializableFormatter(SerializeDelegate<T> serialize)
{
this.serialize = serialize;
}
public int Serialize(ref byte[] bytes, int offset, T value, IFormatterResolver formatterResolver)
{
return serialize(ref bytes, offset, value, formatterResolver);
}
public T Deserialize(byte[] bytes, int offset, IFormatterResolver formatterResolver, out int readSize)
{
throw new NotSupportedException("Anonymous Formatter does not support Deserialize.");
}
}
internal class ObjectSerializationInfo
{
public bool IsIntKey { get; set; }
public bool IsStringKey { get { return !IsIntKey; } }
public bool IsClass { get; set; }
public bool IsStruct { get { return !IsClass; } }
public ConstructorInfo BestmatchConstructor { get; set; }
public EmittableMember[] ConstructorParameters { get; set; }
public EmittableMember[] Members { get; set; }
ObjectSerializationInfo()
{
}
public static ObjectSerializationInfo CreateOrNull(Type type, bool forceStringKey)
{
var ti = type.GetTypeInfo();
var isClass = ti.IsClass;
var contractAttr = ti.GetCustomAttribute<MessagePackObjectAttribute>();
if (contractAttr == null && !forceStringKey)
{
return null;
}
var isIntKey = true;
var intMemebrs = new Dictionary<int, EmittableMember>();
var stringMembers = new Dictionary<string, EmittableMember>();
if (forceStringKey || contractAttr.KeyAsPropertyName)
{
// All public members are serialize target except [Ignore] member.
isIntKey = false;
var hiddenIntKey = 0;
foreach (var item in type.GetRuntimeProperties())
{
if (item.GetCustomAttribute<IgnoreMemberAttribute>(true) != null) continue;
var member = new EmittableMember
{
PropertyInfo = item,
IsReadable = (item.GetGetMethod() != null) && item.GetGetMethod().IsPublic && !item.GetGetMethod().IsStatic,
IsWritable = (item.GetSetMethod() != null) && item.GetSetMethod().IsPublic && !item.GetSetMethod().IsStatic,
StringKey = item.Name
};
if (!member.IsReadable && !member.IsWritable) continue;
member.IntKey = hiddenIntKey++;
stringMembers.Add(member.StringKey, member);
}
foreach (var item in type.GetRuntimeFields())
{
if (item.GetCustomAttribute<IgnoreMemberAttribute>(true) != null) continue;
if (item.GetCustomAttribute<System.Runtime.CompilerServices.CompilerGeneratedAttribute>(true) != null) continue;
if (item.IsStatic) continue;
var member = new EmittableMember
{
FieldInfo = item,
IsReadable = item.IsPublic,
IsWritable = item.IsPublic && !item.IsInitOnly,
StringKey = item.Name
};
if (!member.IsReadable && !member.IsWritable) continue;
member.IntKey = hiddenIntKey++;
stringMembers.Add(member.StringKey, member);
}
}
else
{
// Public members with KeyAttribute except [Ignore] member.
var searchFirst = true;
var hiddenIntKey = 0;
foreach (var item in type.GetRuntimeProperties())
{
if (item.GetCustomAttribute<IgnoreMemberAttribute>(true) != null) continue;
var member = new EmittableMember
{
PropertyInfo = item,
IsReadable = (item.GetGetMethod() != null) && item.GetGetMethod().IsPublic && !item.GetGetMethod().IsStatic,
IsWritable = (item.GetSetMethod() != null) && item.GetSetMethod().IsPublic && !item.GetSetMethod().IsStatic,
};
if (!member.IsReadable && !member.IsWritable) continue;
var key = item.GetCustomAttribute<KeyAttribute>(true);
if (key == null) throw new MessagePackDynamicObjectResolverException("all public members must mark KeyAttribute or IgnoreAttribute." + " type: " + type.FullName + " member:" + item.Name);
if (key.IntKey == null && key.StringKey == null) throw new MessagePackDynamicObjectResolverException("both IntKey and StringKey are null." + " type: " + type.FullName + " member:" + item.Name);