/// <summary>
/// DefineDerivedMethodSignature 定义动态类中方法的签名，支持泛型方法。
/// </summary>
public static MethodBuilder DefineDerivedMethodSignature(TypeBuilder typeBuilder, MethodInfo baseMethod)
{
Type[] argTypes = EmitHelper.GetParametersType(baseMethod);
MethodBuilder methodBuilder = typeBuilder.DefineMethod(baseMethod.Name, baseMethod.Attributes & ~MethodAttributes.Abstract, baseMethod.ReturnType, argTypes);
#region GenericMethod
if (baseMethod.IsGenericMethod)
{
Type[] genericParaTypes = baseMethod.GetGenericArguments();
string[] genericParaNames = EmitHelper.GetGenericParameterNames(baseMethod);
GenericTypeParameterBuilder[] genericTypeParameterBuilders = methodBuilder.DefineGenericParameters(genericParaNames);
for (int i = 0; i < genericTypeParameterBuilders.Length; i++)
{
genericTypeParameterBuilders[i].SetInterfaceConstraints(genericParaTypes[i].GetGenericParameterConstraints());
}
}
#endregion
return(methodBuilder);
}
/// <summary>
/// Stind 间接存储（即存储[type类型]的对象地址）。将间接存储。不支持decimal类型
/// </summary>
public static void Stind(ILGenerator ilGenerator, Type type)
{
if (!type.IsValueType)
{
ilGenerator.Emit(OpCodes.Stind_Ref);
return;
}
if (type.IsEnum)
{
Type underType = Enum.GetUnderlyingType(type);
EmitHelper.Stind(ilGenerator, underType);
return;
}
if (type == typeof(Int64))
{
ilGenerator.Emit(OpCodes.Stind_I8);
return;
}
if (type == typeof(Int32))
{
ilGenerator.Emit(OpCodes.Stind_I4);
return;
}
if (type == typeof(Int16))
{
ilGenerator.Emit(OpCodes.Stind_I2);
return;
}
if (type == typeof(Byte))
{
ilGenerator.Emit(OpCodes.Stind_I1);
return;
}
if (type == typeof(SByte))
{
ilGenerator.Emit(OpCodes.Stind_I1);
return;
}
if (type == typeof(Boolean))
{
ilGenerator.Emit(OpCodes.Stind_I1);
return;
}
if (type == typeof(UInt64))
{
ilGenerator.Emit(OpCodes.Stind_I8);
return;
}
if (type == typeof(UInt32))
{
ilGenerator.Emit(OpCodes.Stind_I4);
return;
}
if (type == typeof(UInt16))
{
ilGenerator.Emit(OpCodes.Stind_I2);
return;
}
if (type == typeof(Single))
{
ilGenerator.Emit(OpCodes.Stind_R4);
return;
}
if (type == typeof(Double))
{
ilGenerator.Emit(OpCodes.Stind_R8);
return;
}
if (type == typeof(IntPtr))
{
ilGenerator.Emit(OpCodes.Stind_I4);
return;
}
if (type == typeof(UIntPtr))
{
ilGenerator.Emit(OpCodes.Stind_I4);
return;
}
throw new Exception(string.Format("The target type:{0} is not supported by EmitHelper.Stind_ForValueType()", type));
}
private void EmitSetPropertyValueMethod(TypeBuilder typeBuilder, MethodInfo baseMethod, Type entityType)
{
var methodBuilder = typeBuilder.DefineMethod("SetPropertyValue",
baseMethod.Attributes & ~MethodAttributes.Abstract, baseMethod.CallingConvention, baseMethod.ReturnType,
EmitHelper.GetParametersType(baseMethod));
var compareStringMethod = typeof(string).GetMethod("op_Equality", new[] { typeof(string), typeof(string) });
var changeTypeMethod = typeof(TypeUtil).GetMethod("ChangeType", new[] { typeof(Type), typeof(object) });
var ilGenerator = methodBuilder.GetILGenerator();
ilGenerator.Emit(OpCodes.Nop);
var tempPros =
entityType.GetProperties(BindingFlags.Public | BindingFlags.Instance |
BindingFlags
.GetProperty); // ESBasic.Helpers.TypeUtil.ConvertListToArray<PropertyInfo>(columnList);
IList <PropertyInfo> proList = new List <PropertyInfo>();
foreach (var propertyInfo in tempPros)
{
if (propertyInfo.CanWrite && propertyInfo.CanRead)
{
proList.Add(propertyInfo);
}
}
var pros = proList.ToArray();
var retLabel = ilGenerator.DefineLabel();
var labels = new Label[pros.Length + 1];
for (var i = 0; i < pros.Length; i++)
{
labels[i] = ilGenerator.DefineLabel();
}
labels[pros.Length] = retLabel;
for (var i = 0; i < pros.Length; i++)
{
var property = pros[i];
ilGenerator.MarkLabel(labels[i]);
ilGenerator.Emit(OpCodes.Ldarg_2);
var proName = property.Name;
ilGenerator.Emit(OpCodes.Ldstr, proName);
ilGenerator.EmitCall(OpCodes.Call, compareStringMethod, new[] { typeof(string), typeof(string) });
ilGenerator.Emit(OpCodes.Brfalse, labels[i + 1]);
ilGenerator.Emit(OpCodes.Nop);
ilGenerator.Emit(OpCodes.Ldarg_1);
EmitHelper.LoadType(ilGenerator, property.PropertyType);
ilGenerator.Emit(OpCodes.Ldarg_3);
ilGenerator.EmitCall(OpCodes.Call, changeTypeMethod,
new[] { typeof(Type), typeof(object) }); //先将object转换到正确的类型，即使还是一个object
#region 类型转换 这一段是必须的，否则会导致内存状态损坏
//注意：TypeUtil.ChangeType返回的是object。
if (property.PropertyType.IsValueType) //值类型，则拆箱
{
ilGenerator.Emit(OpCodes.Unbox_Any, property.PropertyType);
}
else if (property.PropertyType == typeof(byte[]) || property.PropertyType == typeof(string))
{
ilGenerator.Emit(OpCodes.Castclass, property.PropertyType);
}
else if (property.PropertyType == typeof(object) || property.PropertyType.IsClass ||
property.PropertyType.IsGenericType)
{
//do nothing .对应sql_variant
}
else
{
var toStringMethod = typeof(object).GetMethod("ToString");
ilGenerator.EmitCall(OpCodes.Callvirt, toStringMethod, null);
//类型转换
if (property.PropertyType != typeof(string))
{
var parseMethod = property.PropertyType.GetMethod("Parse", new[] { typeof(string) });
ilGenerator.EmitCall(OpCodes.Callvirt, parseMethod, new[] { typeof(string) });
}
}
#endregion
var setPropertyMethod = entityType.GetMethod("set_" + proName, new[] { property.PropertyType });
if (entityType.IsValueType)
{
ilGenerator.EmitCall(OpCodes.Call, setPropertyMethod, new[] { property.PropertyType });
}
else
{
ilGenerator.EmitCall(OpCodes.Callvirt, setPropertyMethod, new[] { property.PropertyType });
}
ilGenerator.Emit(OpCodes.Br, retLabel);
}
ilGenerator.MarkLabel(retLabel);
ilGenerator.Emit(OpCodes.Ret);
typeBuilder.DefineMethodOverride(methodBuilder, baseMethod);
}
private void EmitGetValueMethod(TypeBuilder typeBuilder, MethodInfo baseMethod, Type entityType,
MethodInfo getPropertyValueMethod)
{
var methodBuilder = typeBuilder.DefineMethod("GetValue", baseMethod.Attributes & ~MethodAttributes.Abstract,
baseMethod.CallingConvention, baseMethod.ReturnType, EmitHelper.GetParametersType(baseMethod));
var ilGenerator = methodBuilder.GetILGenerator();
ilGenerator.Emit(OpCodes.Ldarg_0);
ilGenerator.Emit(OpCodes.Ldarg_1);
if (entityType.IsValueType)
{
ilGenerator.Emit(OpCodes.Unbox_Any, entityType);
}
else
{
ilGenerator.Emit(OpCodes.Castclass, entityType);
}
ilGenerator.Emit(OpCodes.Ldarg_2);
ilGenerator.Emit(OpCodes.Callvirt, getPropertyValueMethod);
ilGenerator.Emit(OpCodes.Ret);
typeBuilder.DefineMethodOverride(methodBuilder, baseMethod);
}
private void EmitGetPropertyValueMethod(TypeBuilder typeBuilder, MethodInfo baseMethod, Type entityType)
{
var methodBuilder = typeBuilder.DefineMethod("GetPropertyValue",
baseMethod.Attributes & ~MethodAttributes.Abstract, baseMethod.CallingConvention, baseMethod.ReturnType,
EmitHelper.GetParametersType(baseMethod));
var compareStringMethod = typeof(string).GetMethod("op_Equality", new[] { typeof(string), typeof(string) });
var ilGenerator = methodBuilder.GetILGenerator();
ilGenerator.DeclareLocal(typeof(object));
ilGenerator.Emit(OpCodes.Nop);
var tempPros =
entityType.GetProperties(BindingFlags.Public | BindingFlags.Instance |
BindingFlags
.GetProperty); // ESBasic.Helpers.TypeUtil.ConvertListToArray<PropertyInfo>(columnList);
IList <PropertyInfo> proList = new List <PropertyInfo>();
foreach (var propertyInfo in tempPros)
{
if (propertyInfo.CanWrite && propertyInfo.CanRead)
{
proList.Add(propertyInfo);
}
}
var pros = proList.ToArray();
var loadNullLabel = ilGenerator.DefineLabel();
var retLabel = ilGenerator.DefineLabel();
var labels = new Label[pros.Length + 1];
for (var i = 0; i < pros.Length; i++)
{
labels[i] = ilGenerator.DefineLabel();
}
labels[pros.Length] = loadNullLabel;
for (var i = 0; i < pros.Length; i++)
{
var property = pros[i];
ilGenerator.MarkLabel(labels[i]);
ilGenerator.Emit(OpCodes.Ldarg_2);
var proName = property.Name;
ilGenerator.Emit(OpCodes.Ldstr, proName);
ilGenerator.EmitCall(OpCodes.Call, compareStringMethod, new[] { typeof(string), typeof(string) });
ilGenerator.Emit(OpCodes.Brfalse, labels[i + 1]);
ilGenerator.Emit(OpCodes.Nop);
if (entityType.IsValueType)
{
ilGenerator.Emit(OpCodes.Ldarga, 1);
}
else
{
ilGenerator.Emit(OpCodes.Ldarg_1);
}
var getPropertyMethod = entityType.GetMethod("get_" + proName, new Type[] { });
if (entityType.IsValueType)
{
ilGenerator.EmitCall(OpCodes.Call, getPropertyMethod, new Type[] { });
}
else
{
ilGenerator.EmitCall(OpCodes.Callvirt, getPropertyMethod, new Type[] { });
}
if (property.PropertyType.IsValueType)
{
ilGenerator.Emit(OpCodes.Box, property.PropertyType);
}
ilGenerator.Emit(OpCodes.Stloc_0);
ilGenerator.Emit(OpCodes.Br, retLabel);
}
ilGenerator.MarkLabel(loadNullLabel);
ilGenerator.Emit(OpCodes.Ldnull);
ilGenerator.Emit(OpCodes.Stloc_0);
ilGenerator.Emit(OpCodes.Br, retLabel);
ilGenerator.MarkLabel(retLabel);
ilGenerator.Emit(OpCodes.Ldloc_0);
ilGenerator.Emit(OpCodes.Ret);
typeBuilder.DefineMethodOverride(methodBuilder, baseMethod);
}
