/// <summary>
/// Gera as propriedades para o tipo que será criado.
/// </summary>
/// <param name="tb"></param>
/// <param name="properties"></param>
/// <returns></returns>
private System.Reflection.FieldInfo[] GenerateProperties(System.Reflection.Emit.TypeBuilder tb, DynamicProperty[] properties)
{
var fields = new System.Reflection.Emit.FieldBuilder[properties.Length];
for (int i = 0; i < properties.Length; i++)
{
DynamicProperty dp = properties[i];
var fb = tb.DefineField("_" + dp.Name, dp.Type, System.Reflection.FieldAttributes.Private);
var pb = tb.DefineProperty(dp.Name, System.Reflection.PropertyAttributes.HasDefault, dp.Type, null);
var mbGet = tb.DefineMethod("get_" + dp.Name, System.Reflection.MethodAttributes.Public | System.Reflection.MethodAttributes.SpecialName | System.Reflection.MethodAttributes.HideBySig, dp.Type, Type.EmptyTypes);
var genGet = mbGet.GetILGenerator();
genGet.Emit(System.Reflection.Emit.OpCodes.Ldarg_0);
genGet.Emit(System.Reflection.Emit.OpCodes.Ldfld, fb);
genGet.Emit(System.Reflection.Emit.OpCodes.Ret);
var mbSet = tb.DefineMethod("set_" + dp.Name, System.Reflection.MethodAttributes.Public | System.Reflection.MethodAttributes.SpecialName | System.Reflection.MethodAttributes.HideBySig, null, new Type[] {
dp.Type
});
var genSet = mbSet.GetILGenerator();
genSet.Emit(System.Reflection.Emit.OpCodes.Ldarg_0);
genSet.Emit(System.Reflection.Emit.OpCodes.Ldarg_1);
genSet.Emit(System.Reflection.Emit.OpCodes.Stfld, fb);
genSet.Emit(System.Reflection.Emit.OpCodes.Ret);
pb.SetGetMethod(mbGet);
pb.SetSetMethod(mbSet);
fields[i] = fb;
}
return(fields);
}
static System.Type GenerateFunctionType(System.Type functionType)
{
SQLiteFunctionAttribute attribute = AttributeExtensions.GetCustomAttribute <SQLiteFunctionAttribute>(functionType);
if (attribute == null)
{
return(null);
}
bool ex = TypeExtensions.IsInheritFrom(functionType, typeof(SQLiteFunctionEx)) || attribute.Type == FunctionTypes.Collation;
FastWrapper baseType = GetType(ex ? "System.Data.SQLite.SQLiteFunctionEx" : "System.Data.SQLite.SQLiteFunction");
System.Reflection.AssemblyName assemblyName = new System.Reflection.AssemblyName(functionType.Namespace + ".DynamicClass_" + functionType.Name);
System.Reflection.Emit.AssemblyBuilderAccess accemblyBuilderAccess =
#if netcore
System.Reflection.Emit.AssemblyBuilderAccess.Run;
#else
IsDebug
? System.Reflection.Emit.AssemblyBuilderAccess.RunAndSave
: System.Reflection.Emit.AssemblyBuilderAccess.Run;
#endif
System.Reflection.Emit.AssemblyBuilder assembly =
#if netcore
System.Reflection.Emit.AssemblyBuilder.DefineDynamicAssembly(assemblyName, accemblyBuilderAccess);
#else
System.AppDomain.CurrentDomain.DefineDynamicAssembly(assemblyName, accemblyBuilderAccess);
#endif
#if !netcore
bool canSave = (accemblyBuilderAccess == System.Reflection.Emit.AssemblyBuilderAccess.RunAndSave || accemblyBuilderAccess == System.Reflection.Emit.AssemblyBuilderAccess.Save);
#endif
System.Reflection.Emit.ModuleBuilder module =
#if netcore
assembly.DefineDynamicModule(assemblyName.Name);
#else
canSave
? assembly.DefineDynamicModule(assemblyName.Name, assemblyName.Name + ".dll")
: assembly.DefineDynamicModule(assemblyName.Name);//, n.Name + ".dll");
#endif
System.Reflection.Emit.TypeBuilder type = module.DefineType(
assemblyName.Name + ".DynamicClass",
System.Reflection.TypeAttributes.Public | System.Reflection.TypeAttributes.Sealed | System.Reflection.TypeAttributes.AutoClass,
baseType.Type,
System.Type.EmptyTypes);
{
FastWrapper wrapper = GetType("System.Data.SQLite.SQLiteFunctionAttribute");
System.Reflection.PropertyInfo[] properties = new System.Reflection.PropertyInfo[] {
wrapper.Type.GetProperty("Name"),
wrapper.Type.GetProperty("Arguments"),
wrapper.Type.GetProperty("FuncType"),
};
System.Reflection.Emit.CustomAttributeBuilder attributeBuilder = new System.Reflection.Emit.CustomAttributeBuilder(wrapper.Type.GetConstructor(System.Type.EmptyTypes), new object[0],
properties, new object[] {
attribute.Name,
attribute.Arguments,
TypeExtensions.Convert(attribute.Type, GetType("System.Data.SQLite.FunctionType").Type),
});
type.SetCustomAttribute(attributeBuilder);
}
System.Reflection.Emit.FieldBuilder _o = type.DefineField("_o", functionType, FieldAttributes.Private);
{
System.Reflection.Emit.ConstructorBuilder ctor = type.DefineConstructor(
System.Reflection.MethodAttributes.Public | System.Reflection.MethodAttributes.HideBySig | System.Reflection.MethodAttributes.SpecialName | System.Reflection.MethodAttributes.RTSpecialName,
System.Reflection.CallingConventions.HasThis,
System.Type.EmptyTypes);
System.Reflection.Emit.ILGenerator il = ctor.GetILGenerator();
il.Emit(System.Reflection.Emit.OpCodes.Ldarg_0);
il.Emit(System.Reflection.Emit.OpCodes.Call, baseType.Type.GetConstructor(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.CreateInstance | BindingFlags.Instance, null, System.Type.EmptyTypes, new System.Reflection.ParameterModifier[0]));
il.Emit(System.Reflection.Emit.OpCodes.Nop);
il.Emit(System.Reflection.Emit.OpCodes.Nop);
il.Emit(System.Reflection.Emit.OpCodes.Ldarg_0);
il.Emit(System.Reflection.Emit.OpCodes.Newobj, functionType.GetConstructor(System.Type.EmptyTypes));
il.Emit(System.Reflection.Emit.OpCodes.Stfld, _o);
il.Emit(System.Reflection.Emit.OpCodes.Ldarg_0);
il.Emit(System.Reflection.Emit.OpCodes.Ldfld, _o);
il.Emit(System.Reflection.Emit.OpCodes.Ldarg_0);
if (attribute.Type == FunctionTypes.Collation)
{
il.Emit(System.Reflection.Emit.OpCodes.Ldc_I4_1);
}
else
{
il.Emit(System.Reflection.Emit.OpCodes.Ldc_I4_0);
}
il.Emit(System.Reflection.Emit.OpCodes.Callvirt, functionType.GetMethod("Init", BindingFlags.Public | BindingFlags.Instance | BindingFlags.InvokeMethod, null, new System.Type[] {
typeof(object), typeof(bool)
}, null));
il.Emit(System.Reflection.Emit.OpCodes.Nop);
il.Emit(System.Reflection.Emit.OpCodes.Ret);
}
CreateMethodDelegate createMethod = (methodInfo, action) => {
System.Reflection.ParameterInfo[] parameters = methodInfo.GetParameters();
System.Type[] parameterTypes = new System.Type[parameters.Length];
for (int i = 0; i < parameters.Length; i++)
{
parameterTypes[i] = parameters[i].ParameterType;
}
System.Reflection.Emit.MethodBuilder method = type.DefineMethod(methodInfo.Name, (methodInfo.Attributes | MethodAttributes.NewSlot) ^ MethodAttributes.NewSlot, methodInfo.CallingConvention, methodInfo.ReturnType, parameterTypes);
for (int i = 0; i < parameters.Length; i++)
{
System.Reflection.Emit.ParameterBuilder parameter = method.DefineParameter(i + 1, parameters[i].Attributes, parameters[i].Name);
if (parameters[i].IsOptional)
{
if (parameters[i].ParameterType.IsValueType && parameters[i].DefaultValue == null)
{
continue;
}
parameter.SetConstant(parameters[i].DefaultValue);
}
}
System.Reflection.Emit.ILGenerator il = method.GetILGenerator();
bool hasReturn = (methodInfo.ReturnType != typeof(void));
System.Reflection.Emit.LocalBuilder @return = null;
if (hasReturn)
{
@return = il.DeclareLocal(methodInfo.ReturnType);
}
il.Emit(System.Reflection.Emit.OpCodes.Nop);
il.Emit(System.Reflection.Emit.OpCodes.Ldarg_0);
il.Emit(System.Reflection.Emit.OpCodes.Ldfld, _o);
action(functionType.GetMethod(methodInfo.Name, BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance), method, il);
il.Emit(System.Reflection.Emit.OpCodes.Ret);
};
if (attribute.Type == FunctionTypes.Scalar)
{
createMethod(baseType.Type.GetMethod("Invoke"), (methodInfo, method, il) => {
il.Emit(System.Reflection.Emit.OpCodes.Ldarg_1);
il.Emit(System.Reflection.Emit.OpCodes.Callvirt, methodInfo);
il.Emit(System.Reflection.Emit.OpCodes.Stloc_0);
System.Reflection.Emit.Label label = il.DefineLabel();
il.Emit(System.Reflection.Emit.OpCodes.Br_S, label);
il.MarkLabel(label);
il.Emit(System.Reflection.Emit.OpCodes.Ldloc_0);
});
}
else if (attribute.Type == FunctionTypes.Collation)
{
createMethod(baseType.Type.GetMethod("Compare"), (methodInfo, method, il) => {
il.Emit(System.Reflection.Emit.OpCodes.Ldarg_1);
il.Emit(System.Reflection.Emit.OpCodes.Ldarg_2);
il.Emit(System.Reflection.Emit.OpCodes.Callvirt, methodInfo);
il.Emit(System.Reflection.Emit.OpCodes.Stloc_0);
System.Reflection.Emit.Label label = il.DefineLabel();
il.Emit(System.Reflection.Emit.OpCodes.Br_S, label);
il.MarkLabel(label);
il.Emit(System.Reflection.Emit.OpCodes.Ldloc_0);
});
}
else
{
createMethod(baseType.Type.GetMethod("Final"), (methodInfo, method, il) => {
il.Emit(System.Reflection.Emit.OpCodes.Ldarg_1);
il.Emit(System.Reflection.Emit.OpCodes.Callvirt, methodInfo);
il.Emit(System.Reflection.Emit.OpCodes.Stloc_0);
System.Reflection.Emit.Label label = il.DefineLabel();
il.Emit(System.Reflection.Emit.OpCodes.Br_S, label);
il.MarkLabel(label);
il.Emit(System.Reflection.Emit.OpCodes.Ldloc_0);
});
createMethod(baseType.Type.GetMethod("Step"), (methodInfo, method, il) => {
il.Emit(System.Reflection.Emit.OpCodes.Ldarg_1);
il.Emit(System.Reflection.Emit.OpCodes.Ldarg_2);
il.Emit(System.Reflection.Emit.OpCodes.Ldarg_3);
il.Emit(System.Reflection.Emit.OpCodes.Callvirt, methodInfo);
il.Emit(System.Reflection.Emit.OpCodes.Nop);
});
}
{
System.Reflection.MethodInfo methodInfo_base = baseType.Type.GetMethod("Dispose", BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.InvokeMethod, null, new System.Type[] { typeof(bool) }, null);
createMethod(methodInfo_base, (methodInfo, method, il) => {
il.Emit(System.Reflection.Emit.OpCodes.Ldarg_1);
il.Emit(System.Reflection.Emit.OpCodes.Callvirt, methodInfo);
il.Emit(System.Reflection.Emit.OpCodes.Nop);
il.Emit(System.Reflection.Emit.OpCodes.Ldarg_0);
il.Emit(System.Reflection.Emit.OpCodes.Ldarg_1);
il.Emit(System.Reflection.Emit.OpCodes.Call, methodInfo_base);
il.Emit(System.Reflection.Emit.OpCodes.Nop);
});
}
#if netcore20
var result = type.CreateTypeInfo();
#else
var result = type.CreateType();
#endif
#if !netcore
if (canSave)
{
assembly.Save(assemblyName.Name + ".dll");
}
#endif
return(result);
}
