abstraction

JDBC provides an API, which may be used to connect to different RDBMS or similar datastores. But the datastores differ in implementation (e.g. SQL dialects). Is it possible to use JDBC in such a way, that my queries and statements work on most common RDBMS (e.g.: Oracle, PostgreSQL, SQL Server, MySQL)? That question is interesting for me at two aspects: * Common SQL (INSERT, UPDATE, SELECT etc.) * Accessing Meta data (getting information about tables and columns) I am currently experimenting with an self written persistence framework and want to plug a JDBC datastore under it. So if I write a

I have been using StructureMap for more than a year now. And all this time I used to have a wrapper class called IoC which looked like this class IoC { public static T GetInstance<T>() { return (T)GetInstance(typeof(T)); } public static IEnumerable<T> GetAllInstances<T>() { return ObjectFactory.GetAllInstances<T>(); } public static IEnumerable GetAllInstances(Type type) { return ObjectFactory.GetAllInstances(type); } public static object GetInstance(Type type) { return ObjectFactory.GetInstance(type); } public static void Inject<T>(T obj) { ObjectFactory.Inject(obj); } } I added the wrapper

Say I have a large code using Array of Structures (AoS) memory layout. I would like to build a zero-cost abstraction in C++ which allows me to switch between AoS and SoA with as little refactoring effort as possible. For instance take a class with access member functions struct Item{ auto& myDouble(){ return mDouble; } auto& myChar(){ return mChar; } auto& myString(){ return mString; } private: double mDouble; char mChar; std::string mString; }; which is used inside a container in a loop std::vector<Item> vec_(1000); for (auto& i : vec_) i.myDouble()=5.; I would like to change the first

I was wondering if it's somehow possible to add another abstraction controller between AppController and my app's other controllers? So that my controllers, e.g. UsersController extends SecureController and SecureController extends AppController. Also I want to be able to have other controllers extend AppController directly: SomeNonSecureController extends AppController. this is because my current AppController has all sorts of Auth and ACL stuff in its beforeFilter, but i also have controllers that don't need that security stuff (before everything needed the security, no new specs have been

Currently, I try to write a small game program (Skat) as a hobby project. Skat is a trick-taking game were two players play against a single player. As there are different kinds of players (lokal player, network player, computer, etc.), I wanted to abstract the interface to the player. My basic idea is to use a typeclass Player , that defines all kind of things, a player have to do and to know (playing a card, get notified about who won the trick, etc). Then, the whole game is just done by a function playSkat :: (Player a, Player b, Player c) => a -> b -> c -> IO () where a , b and c might be

I am trying to add DataBinding to my app. In my app, I have a BaseActivity which has a Toolbar and a FrameLayout. FrameLayout is container for activities' which extend the BaseActivity. How can I add databinding to both my BaseActivity and the extending activities? I'll share my code without DataBinding: Here is my BaseActivity.java : public class BaseActivity extends AppCompatActivity { @Override public void setContentView(@LayoutRes int layoutResID) { LinearLayout container = (LinearLayout) getLayoutInflater().inflate(R.layout.activity_base, null); FrameLayout activityContent = (FrameLayout)