More Boilerplate Code Removal

In my quest to never repeat myself, here’s another little trick that I use.

Say we have a number of operations represented by methods that all take the same parameter. Here’s the static data creation code in Suteki Shop again:

public void Insert1()
{
    var sessionFactory = configuration.BuildSessionFactory();
    using (var session = sessionFactory.OpenSession())
    using (var transaction = session.BeginTransaction())
    {
        InsertRoles(session);
        InsertAdministrator(session);
        InsertRootCategory(session);

        transaction.Commit();
    }
}

It’s really boring that we have to repeatedly write ‘(session)’. Is there anther way? Oh yes! Enter my ‘ApplyTo’ extension method:

public static void ApplyTo<T>(this T arg, params Action<T>[] actions)
{
    Array.ForEach(actions, action => action(arg));
}

Now our Insert method looks much cleaner:

public void Insert()
{
    var sessionFactory = configuration.BuildSessionFactory();
    using (var session = sessionFactory.OpenSession())
    using (var transaction = session.BeginTransaction())
    {
        session.ApplyTo(
            InsertRoles,
            InsertAdministrator,
            InsertRootCategory
            );

        transaction.Commit();
    }
}

Isn’t that nicer?