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#region License | |
// Copyright (c) 2007 James Newton-King | |
// | |
// Permission is hereby granted, free of charge, to any person | |
// obtaining a copy of this software and associated documentation | |
// files (the "Software"), to deal in the Software without | |
// restriction, including without limitation the rights to use, | |
// copy, modify, merge, publish, distribute, sublicense, and/or sell | |
// copies of the Software, and to permit persons to whom the | |
// Software is furnished to do so, subject to the following | |
// conditions: | |
// | |
// The above copyright notice and this permission notice shall be | |
// included in all copies or substantial portions of the Software. | |
// | |
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES | |
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT | |
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, | |
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
// OTHER DEALINGS IN THE SOFTWARE. | |
#endregion | |
#if !(PORTABLE || NETFX_CORE || PORTABLE40) | |
using System; | |
using System.Collections.Generic; | |
#if NET20 | |
using Newtonsoft.Json.Utilities.LinqBridge; | |
#endif | |
using System.Reflection; | |
using System.Reflection.Emit; | |
using Newtonsoft.Json.Serialization; | |
using System.Globalization; | |
namespace Newtonsoft.Json.Utilities | |
{ | |
internal class DynamicReflectionDelegateFactory : ReflectionDelegateFactory | |
{ | |
public static DynamicReflectionDelegateFactory Instance = new DynamicReflectionDelegateFactory(); | |
private static DynamicMethod CreateDynamicMethod(string name, Type returnType, Type[] parameterTypes, Type owner) | |
{ | |
DynamicMethod dynamicMethod = !owner.IsInterface() | |
? new DynamicMethod(name, returnType, parameterTypes, owner, true) | |
: new DynamicMethod(name, returnType, parameterTypes, owner.Module, true); | |
return dynamicMethod; | |
} | |
public override MethodCall<T, object> CreateMethodCall<T>(MethodBase method) | |
{ | |
DynamicMethod dynamicMethod = CreateDynamicMethod(method.ToString(), typeof(object), new[] { typeof(object), typeof(object[]) }, method.DeclaringType); | |
ILGenerator generator = dynamicMethod.GetILGenerator(); | |
GenerateCreateMethodCallIL(method, generator); | |
return (MethodCall<T, object>)dynamicMethod.CreateDelegate(typeof(MethodCall<T, object>)); | |
} | |
private void GenerateCreateMethodCallIL(MethodBase method, ILGenerator generator) | |
{ | |
ParameterInfo[] args = method.GetParameters(); | |
Label argsOk = generator.DefineLabel(); | |
generator.Emit(OpCodes.Ldarg_1); | |
generator.Emit(OpCodes.Ldlen); | |
generator.Emit(OpCodes.Ldc_I4, args.Length); | |
generator.Emit(OpCodes.Beq, argsOk); | |
generator.Emit(OpCodes.Newobj, typeof(TargetParameterCountException).GetConstructor(ReflectionUtils.EmptyTypes)); | |
generator.Emit(OpCodes.Throw); | |
generator.MarkLabel(argsOk); | |
if (!method.IsConstructor && !method.IsStatic) | |
generator.PushInstance(method.DeclaringType); | |
for (int i = 0; i < args.Length; i++) | |
{ | |
generator.Emit(OpCodes.Ldarg_1); | |
generator.Emit(OpCodes.Ldc_I4, i); | |
generator.Emit(OpCodes.Ldelem_Ref); | |
// i want value types with a null value to be change to their default value | |
// i tried but the code below is creating an invalid program exception | |
// how do you ILGenerator? | |
//if (args[i].ParameterType.IsValueType()) | |
//{ | |
// Label skipDefault = generator.DefineLabel(); | |
// generator.Emit(OpCodes.Brtrue_S, skipDefault); | |
// generator.DeclareLocal(args[i].ParameterType); | |
// generator.Emit(OpCodes.Ldloc_0); | |
// generator.Emit(OpCodes.Box, args[i].ParameterType); | |
// generator.MarkLabel(skipDefault); | |
//} | |
generator.UnboxIfNeeded(args[i].ParameterType); | |
} | |
if (method.IsConstructor) | |
generator.Emit(OpCodes.Newobj, (ConstructorInfo)method); | |
else | |
generator.CallMethod((MethodInfo)method); | |
Type returnType = method.IsConstructor | |
? method.DeclaringType | |
: ((MethodInfo)method).ReturnType; | |
if (returnType != typeof(void)) | |
generator.BoxIfNeeded(returnType); | |
else | |
generator.Emit(OpCodes.Ldnull); | |
generator.Return(); | |
} | |
public override Func<T> CreateDefaultConstructor<T>(Type type) | |
{ | |
DynamicMethod dynamicMethod = CreateDynamicMethod("Create" + type.FullName, typeof(T), ReflectionUtils.EmptyTypes, type); | |
dynamicMethod.InitLocals = true; | |
ILGenerator generator = dynamicMethod.GetILGenerator(); | |
GenerateCreateDefaultConstructorIL(type, generator); | |
return (Func<T>)dynamicMethod.CreateDelegate(typeof(Func<T>)); | |
} | |
private void GenerateCreateDefaultConstructorIL(Type type, ILGenerator generator) | |
{ | |
if (type.IsValueType()) | |
{ | |
generator.DeclareLocal(type); | |
generator.Emit(OpCodes.Ldloc_0); | |
generator.Emit(OpCodes.Box, type); | |
} | |
else | |
{ | |
ConstructorInfo constructorInfo = | |
type.GetConstructor(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance, null, | |
ReflectionUtils.EmptyTypes, null); | |
if (constructorInfo == null) | |
throw new ArgumentException("Could not get constructor for {0}.".FormatWith(CultureInfo.InvariantCulture, type)); | |
generator.Emit(OpCodes.Newobj, constructorInfo); | |
} | |
generator.Return(); | |
} | |
public override Func<T, object> CreateGet<T>(PropertyInfo propertyInfo) | |
{ | |
DynamicMethod dynamicMethod = CreateDynamicMethod("Get" + propertyInfo.Name, typeof(T), new[] { typeof(object) }, propertyInfo.DeclaringType); | |
ILGenerator generator = dynamicMethod.GetILGenerator(); | |
GenerateCreateGetPropertyIL(propertyInfo, generator); | |
return (Func<T, object>)dynamicMethod.CreateDelegate(typeof(Func<T, object>)); | |
} | |
private void GenerateCreateGetPropertyIL(PropertyInfo propertyInfo, ILGenerator generator) | |
{ | |
MethodInfo getMethod = propertyInfo.GetGetMethod(true); | |
if (getMethod == null) | |
throw new ArgumentException("Property '{0}' does not have a getter.".FormatWith(CultureInfo.InvariantCulture, propertyInfo.Name)); | |
if (!getMethod.IsStatic) | |
generator.PushInstance(propertyInfo.DeclaringType); | |
generator.CallMethod(getMethod); | |
generator.BoxIfNeeded(propertyInfo.PropertyType); | |
generator.Return(); | |
} | |
public override Func<T, object> CreateGet<T>(FieldInfo fieldInfo) | |
{ | |
DynamicMethod dynamicMethod = CreateDynamicMethod("Get" + fieldInfo.Name, typeof(T), new[] { typeof(object) }, fieldInfo.DeclaringType); | |
ILGenerator generator = dynamicMethod.GetILGenerator(); | |
GenerateCreateGetFieldIL(fieldInfo, generator); | |
return (Func<T, object>)dynamicMethod.CreateDelegate(typeof(Func<T, object>)); | |
} | |
private void GenerateCreateGetFieldIL(FieldInfo fieldInfo, ILGenerator generator) | |
{ | |
if (!fieldInfo.IsStatic) | |
generator.PushInstance(fieldInfo.DeclaringType); | |
generator.Emit(OpCodes.Ldfld, fieldInfo); | |
generator.BoxIfNeeded(fieldInfo.FieldType); | |
generator.Return(); | |
} | |
public override Action<T, object> CreateSet<T>(FieldInfo fieldInfo) | |
{ | |
DynamicMethod dynamicMethod = CreateDynamicMethod("Set" + fieldInfo.Name, null, new[] { typeof(T), typeof(object) }, fieldInfo.DeclaringType); | |
ILGenerator generator = dynamicMethod.GetILGenerator(); | |
GenerateCreateSetFieldIL(fieldInfo, generator); | |
return (Action<T, object>)dynamicMethod.CreateDelegate(typeof(Action<T, object>)); | |
} | |
internal static void GenerateCreateSetFieldIL(FieldInfo fieldInfo, ILGenerator generator) | |
{ | |
if (!fieldInfo.IsStatic) | |
generator.PushInstance(fieldInfo.DeclaringType); | |
generator.Emit(OpCodes.Ldarg_1); | |
generator.UnboxIfNeeded(fieldInfo.FieldType); | |
generator.Emit(OpCodes.Stfld, fieldInfo); | |
generator.Return(); | |
} | |
public override Action<T, object> CreateSet<T>(PropertyInfo propertyInfo) | |
{ | |
DynamicMethod dynamicMethod = CreateDynamicMethod("Set" + propertyInfo.Name, null, new[] { typeof(T), typeof(object) }, propertyInfo.DeclaringType); | |
ILGenerator generator = dynamicMethod.GetILGenerator(); | |
GenerateCreateSetPropertyIL(propertyInfo, generator); | |
return (Action<T, object>)dynamicMethod.CreateDelegate(typeof(Action<T, object>)); | |
} | |
internal static void GenerateCreateSetPropertyIL(PropertyInfo propertyInfo, ILGenerator generator) | |
{ | |
MethodInfo setMethod = propertyInfo.GetSetMethod(true); | |
if (!setMethod.IsStatic) | |
generator.PushInstance(propertyInfo.DeclaringType); | |
generator.Emit(OpCodes.Ldarg_1); | |
generator.UnboxIfNeeded(propertyInfo.PropertyType); | |
generator.CallMethod(setMethod); | |
generator.Return(); | |
} | |
} | |
} | |
#endif |
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