/// <summary>
/// 创建构造函数
/// </summary>
/// <param name="type"></param>
/// <param name="constructorInfo"></param>
/// <returns></returns>
public static DynamicConstructorInfoHandler CreateDynamicConstructorInfoHandler(Type type, ConstructorInfo constructorInfo)
{
Int32 argIndex = 0;
var dynamicMethod = new DynamicMethod("DynamicConstructor",
MethodAttributes.Static | MethodAttributes.Public, CallingConventions.Standard, typeof(Object), new[] { typeof(Object[]) }, type, true);
var generator = dynamicMethod.GetILGenerator();
foreach (var parameter in constructorInfo.GetParameters())
{
generator.Emit(OpCodes.Ldarg_0);
if (argIndex > 8)
{
generator.Emit(OpCodesFactory.GetLdc_I4(argIndex), argIndex);
}
else
{
generator.Emit(OpCodesFactory.GetLdc_I4(argIndex));
}
generator.Emit(OpCodes.Ldelem_Ref);
OpCodesFactory.UnboxIfNeeded(generator, parameter.ParameterType);
argIndex++;
}
generator.Emit(OpCodes.Newobj, constructorInfo);
generator.Emit(OpCodes.Ret);
return((DynamicConstructorInfoHandler)dynamicMethod.CreateDelegate(typeof(DynamicConstructorInfoHandler)));
}
/// <summary>
/// 创建PropertyInfo的动态方法get
/// </summary>
/// <param name="type"></param>
/// <param name="propertyInfo"></param>
/// <returns></returns>
public static DynamicPropertyGetHandler CreateGetHandler(Type type, PropertyInfo propertyInfo)
{
var getMethodInfo = propertyInfo.GetGetMethod(true);
Int32 argIndex = 0;
var dynamicGet = new DynamicMethod("DynamicGet", typeof(Object), new[] { typeof(Object), typeof(Object[]) }, type, true);
var getGenerator = dynamicGet.GetILGenerator();
getGenerator.Emit(OpCodes.Ldarg_0);
foreach (var parameter in getMethodInfo.GetParameters())
{
getGenerator.Emit(OpCodes.Ldarg_1);
if (argIndex > 8)
{
getGenerator.Emit(OpCodesFactory.GetLdc_I4(argIndex), argIndex);
}
else
{
getGenerator.Emit(OpCodesFactory.GetLdc_I4(argIndex));
}
getGenerator.Emit(OpCodes.Ldelem_Ref);
OpCodesFactory.UnboxIfNeeded(getGenerator, parameter.ParameterType);
argIndex++;
}
getGenerator.Emit(OpCodes.Callvirt, getMethodInfo);
OpCodesFactory.BoxIfNeeded(getGenerator, getMethodInfo.ReturnType);
getGenerator.Emit(OpCodes.Ret);
return((DynamicPropertyGetHandler)dynamicGet.CreateDelegate(typeof(DynamicPropertyGetHandler)));
}
/// <summary>
/// 创建Field的动态方法get
/// </summary>
/// <param name="type"></param>
/// <param name="fieldInfo"></param>
/// <returns></returns>
public static DynamicFieldGetHandler CreateGetHandler(Type type, FieldInfo fieldInfo)
{
var dynamicGet = CreateGetDynamicMethod(type);
var getGenerator = dynamicGet.GetILGenerator();
getGenerator.Emit(OpCodes.Ldarg_0);
getGenerator.Emit(OpCodes.Ldfld, fieldInfo);
OpCodesFactory.BoxIfNeeded(getGenerator, fieldInfo.FieldType);
getGenerator.Emit(OpCodes.Ret);
return((DynamicFieldGetHandler)dynamicGet.CreateDelegate(typeof(DynamicFieldGetHandler)));
}
/// <summary>
/// 创建PropertyInfo的动态方法Set
/// </summary>
/// <param name="type"></param>
/// <param name="propertyInfo"></param>
/// <returns></returns>
public static DynamicPropertySetHandler CreateSetHandler(Type type, PropertyInfo propertyInfo)
{
var setMethodInfo = propertyInfo.GetSetMethod(true);
Int32 argCount = setMethodInfo.GetParameters().Length;
Int32 argIndex = 0;
var dynamicSet = new DynamicMethod("DynamicSet", typeof(void), new[] { typeof(Object), typeof(Object), typeof(Object[]) }, type, true);
var setGenerator = dynamicSet.GetILGenerator();
setGenerator.Emit(OpCodes.Ldarg_0);
foreach (var parameter in setMethodInfo.GetParameters())
{
if (argIndex + 1 >= argCount)
{
break;
}
setGenerator.Emit(OpCodes.Ldarg_2);
if (argIndex > 8)
{
setGenerator.Emit(OpCodesFactory.GetLdc_I4(argIndex), argIndex);
}
else
{
setGenerator.Emit(OpCodesFactory.GetLdc_I4(argIndex));
}
setGenerator.Emit(OpCodes.Ldelem_Ref);
OpCodesFactory.UnboxIfNeeded(setGenerator, parameter.ParameterType);
argIndex++;
}
setGenerator.Emit(OpCodes.Ldarg_1);
OpCodesFactory.UnboxIfNeeded(setGenerator, setMethodInfo.GetParameters()[argIndex].ParameterType);
setGenerator.Emit(OpCodes.Call, setMethodInfo);
setGenerator.Emit(OpCodes.Ret);
return((DynamicPropertySetHandler)dynamicSet.CreateDelegate(typeof(DynamicPropertySetHandler)));
}
