Generic Repository for SQLite-Net in Xamarin Project

Question

I am wondering if there is a way to write a generic repository for my Xamarin project versus writing a different Repository for each entity in my object. The Xamarin Tasky P

Answer 1

My implementation with the help of unity IOC is given below, My project includes the PCL, Xamarin Android & Xamarin iOS projects

Define a base model with primary key

public class BaseModel
{
    [PrimaryKey, AutoIncrement]
    public int Id { get; set; }
}

Define a generic base repository as shown below

public interface IBaseRepository : IDisposable
    where T :BaseModel, new()
    {
        List GetItems();

        T GetItem(int id);

        int GetItemsCount();

        int SaveItem(T item);

        int SaveAllItem(IEnumerable items);
    }


public class BaseRepository : BaseRepository where T : BaseModel, new()
    {
        private static readonly object locker = new object();
        protected SQLiteConnection DatabaseConnection;
        public BaseRepository(string dbPath)
        {
            DatabaseConnection = new SQLiteConnection(dbPath);
            DatabaseConnection.CreateTable();
        }

        public List GetItems()
        {
            lock (locker)
            {
                return DatabaseConnection.Table().ToList();
            }
        }

        public int GetItemsCount()
        {
            lock (locker)
            {
                return DatabaseConnection.Table().Count();
            }
        }

        public T GetItem(int id)
        {
            lock (locker)
            {
                return DatabaseConnection.Table().Where(i => i.Id == id).FirstOrDefault();
            }
        }

        public int SaveItem(T item)
        {
            lock (locker)
            {
                if (item.Id != 0)
                {
                    return DatabaseConnection.Update(item);
                }
                else
                {
                    return DatabaseConnection.Insert(item);
                }
            }
        }


    }

Define two sample classes which are inherited from the BaseModel

public class Entity1 : BaseModel
    {
        public int ItemName
        {
            get;
            set;
        }
    }


public class Entity2 : BaseModel
{
    public int Description
    {
        get;
        set;
    }
}


public static UnityContainer Container { get; private set; }

    public static void InitializeUnityContainer()
    {
        if (Container == null)
            Container = new UnityContainer();
    }

Register

Container.RegisterInstance>(new BaseRepository(DatabasePath));
    Container.RegisterInstance>(new BaseRepository(DatabasePath));

resolve like this

using (var repo1 = App.Container.Resolve>())
{

}