private DbDataReader HandleRead(DataSet db, DbCommand cmd)
{
var prms = _mi.GetParameters();
List <object> parameter_values = new List <object>();
parameter_values.Add(db);
if (prms.Length == 2 && prms[1].ParameterType == typeof(DbCommand))
{
parameter_values.Add(cmd);
if (wrapped_compiledMethod_Read == null)
{
wrapped_compiledMethod_Read = CommandExecutionHandlerImpl.CollectCommandHandlerMethod_Query(_mi, _instanceType);
}
if (_mi.IsStatic)
{
return(wrapped_compiledMethod_Read(db, cmd));
}
else
{
return(wrapped_compiledMethod_Read(db, cmd));
//throw new NotImplementedException("public DbDataReader " + _mi.Name + "(DataSet db, DbCommand cmd) of '" + _instanceType.Name + "'");
}
}
else
{
List <object> invoke_parameters = new List <object>();
invoke_parameters.Add(db);
StringBuilder debug_params = new StringBuilder();
for (int ix = 1; ix < prms.Length; ix++)
{
ParameterInfo method_prm = prms[ix];
var cmd_prm = cmd.Parameters[method_prm.Name];
object prm_value = GetTypedCommandParameter(cmd, method_prm);
invoke_parameters.Add(prm_value);
string debug_method_prm; debug_method_prm = TypeNameAsText(method_prm.ParameterType);
debug_params.Append(", " + debug_method_prm + " " + method_prm.Name);
}
if (_mi.IsStatic)
{
object returnValues = _mi.Invoke(null, invoke_parameters.ToArray());
DataTable[] result_tables = CreateDbDataReaderFromSingleSetReturnValues(_mi.ReturnType, returnValues); // single/multiple result set(from dibix); enumerable or not; complex or not(names for columns?(from SQL/accessor))
return(new DataTableReader(result_tables));
}
else
{
object handlerInstance = Activator.CreateInstance(this._instanceType);
object returnValues = _mi.Invoke(handlerInstance, invoke_parameters.ToArray());
DataTable[] result_tables = CreateDbDataReaderFromSingleSetReturnValues(_mi.ReturnType, returnValues); // single/multiple result set(from dibix); enumerable or not; complex or not(names for columns?(from SQL/accessor))
return(new DataTableReader(result_tables));
//string debug_ret; debug_ret = TypeNameAsText(_mi.ReturnType);
//throw new NotImplementedException("public " + debug_ret + " " + _mi.Name + "(DataSet db" + debug_params.ToString() + ") of '" + _instanceType.Name + "'");
}
}
}
internal override Func <DataSet, DbCommand, DbDataReader> DoCompileReadMethod()
{
return(CommandExecutionHandlerImpl.CollectCommandHandlerMethod_Query(MethodCallExpr.Method, HandlerMethodOwner));
}