working with QB field mapping registry

COA.EnterpriseServices.DataAccess/Helpers/BaseHelper.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace COA.EnterpriseServices.DataAccess.Helpers
+{
+    public class BaseHelper<T> where T : class, IRecord
+    {
+        protected readonly ICollection<IDataAccess<T>> dataAccessInstances;
+
+        public BaseHelper()
+        {
+            dataAccessInstances = Dependencies.Container
+                .GetAllInstances<IDataAccess<T>>()
+                .OrderBy(i => i.GetType().Name.StartsWith("QuickBase", StringComparison.OrdinalIgnoreCase))
+                .ToList();
+        }
+
+        protected TResult Invoke<TResult>(Func<IDataAccess<T>, TResult> func)
+        {
+            var results = new List<TResult>();
+
+            foreach (var dataAccessInstance in dataAccessInstances)
+            {
+                results.Add(func(dataAccessInstance));
+            }
+
+            // if the "EF" version invokes first, return that value
+            return results.FirstOrDefault(r => r != null && !r.Equals(default(TResult)));
+        }
+    }
+}

COA.EnterpriseServices.DataAccess/Helpers/CreditorHelper.cs

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+using COA.EnterpriseServices.DataAccess.Entities;
+using System.Collections.Generic;
+using System.Text;
+
+namespace COA.EnterpriseServices.DataAccess.Helpers
+{
+    public class CreditorHelper : BaseHelper<Creditor>
+    {
+        public Creditor GetCreditor(int id)
+        {
+            return Invoke(d => d.Get(id));
+        }
+
+        public ICollection<Creditor> FindCreditorsByName(string name)
+        {
+            return Invoke(d => d.Get(c => c.ClientFirstName.Contains(name) || c.ClientLastName.Contains(name)));
+        }
+
+        public ICollection<Creditor> FindByStatus(string status)
+        {
+            return Invoke(d => d.Get(c => c.Status == status));
+        }
+
+        public bool AddCreditor(Creditor creditor)
+        {
+            return Invoke(d => d.Add(creditor));
+        }
+    }
+}