Design Pattern - Structural - Repository

Scenario:

Create repository for data store.

Solution:

Structural Pattern is used to mediate between the domain and data mapping layers like an in memory object collection.

Example: Create repository for data store [DataRepositoryPattern/MockRepositoryPattern].

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public class DataRepositoryPattern<T> : IRepositoryPattern<T> { public bool TryRunStoredProcedure<T>(out T result, string name, params Param[] param) { try { result = RunStoredProcedure<T>(name, param).FirstOrDefault(); return true; } catch (System.Exception) { result = default(T); return false; } } private IEnumerable<T> RunStoredProcedure<T>(string name, Param[] param) { throw new NotImplementedException(); } } public class MockRepositoryPattern<T> : IRepositoryPattern<T> { public bool TryRunStoredProcedure<T>(out T result, string name, params Param[] param) { try { result = RunStoredProcedure<T>(name, param).FirstOrDefault(); return true; } catch (System.Exception) { result = default(T); return false; } } private IEnumerable<T> RunStoredProcedure<T>(string name, Param[] param) { throw new NotImplementedException(); } } interface IRepositoryPattern<T> { bool TryRunStoredProcedure<T>(out T result, string name, params Param[] param); } public class Param { } public class RepositoryPattern { static void Main(string[] args) { DataRepositoryPattern<string> pattern = new DataRepositoryPattern<string>(); if (pattern.TryRunStoredProcedure(out string result, "GetUsersById", new Param[1] { new Param() })) { } MockRepositoryPattern<string> mockPattern = new MockRepositoryPattern<string>(); if (mockPattern.TryRunStoredProcedure(out string mockResult, "GetUsersById", new Param[1] { new Param() })) { } } }