Issue #421 pull request. #1

RepoDb.Core/RepoDb.Tests/RepoDb.IntegrationTests/Helper.cs

@@ -7,6 +7,7 @@
 using System.Collections.Generic;
 using Microsoft.Data.SqlClient;
 using System.Dynamic;
+using System.Globalization;
 using System.Linq;
 using System.Reflection;
 
@@ -391,7 +392,7 @@ public static List<IdentityTableWithDifferentPrimary> CreateIdentityTableWithDif
                 {
                     RowGuid = Guid.NewGuid(),
                     ColumnBit = true,
-                    ColumnDateTime = EpocDate.AddDays(index),
+                    ColumnDateTime = EpocDate.AddDays(index).ToString(CultureInfo.InvariantCulture),
                     ColumnDateTime2 = DateTime.UtcNow,
                     ColumnDecimal = index,
                     ColumnFloat = index,
@@ -413,7 +414,7 @@ public static IdentityTableWithDifferentPrimary CreateIdentityTableWithDifferent
             {
                 RowGuid = Guid.NewGuid(),
                 ColumnBit = true,
-                ColumnDateTime = EpocDate,
+                ColumnDateTime = EpocDate.ToString(CultureInfo.InvariantCulture),
                 ColumnDateTime2 = DateTime.UtcNow,
                 ColumnDecimal = Convert.ToDecimal(random.Next(int.MinValue, int.MaxValue)),
                 ColumnFloat = Convert.ToSingle(random.Next(int.MinValue, int.MaxValue)),

RepoDb.Core/RepoDb.Tests/RepoDb.IntegrationTests/Models/IdentityTableWithDifferentPrimary.cs

@@ -1,16 +1,24 @@
-using RepoDb.Attributes;
-using System;
+using System;
+using System.Globalization;
+using RepoDb.Attributes;
+using RepoDb.Entity;
 
 namespace RepoDb.IntegrationTests.Models
 {
     [Map("[sc].[IdentityTable]")]
-    public class IdentityTableWithDifferentPrimary
+    public class IdentityTableWithDifferentPrimary : BaseEntity<IdentityTableWithDifferentPrimary>
     {
+        public IdentityTableWithDifferentPrimary()
+        {
+            Map(p => ColumnDateTime).Convert<string>(x => DateTime.Parse(x, CultureInfo.InvariantCulture));
+            Map(p => ColumnDateTime).Convert<DateTime, string>(x => x.ToString(CultureInfo.InvariantCulture));
+        }
+
         public long Id { get; set; }
         [Primary]
         public Guid RowGuid { get; set; }
         public bool? ColumnBit { get; set; }
-        public DateTime? ColumnDateTime { get; set; }
+        public string ColumnDateTime { get; set; }
         public DateTime? ColumnDateTime2 { get; set; }
         public decimal? ColumnDecimal { get; set; }
         public double? ColumnFloat { get; set; }

RepoDb.Core/RepoDb.Tests/RepoDb.IntegrationTests/Setup/Database.cs

@@ -18,11 +18,18 @@ public static void Initialize()
             var connectionStringForMaster = Environment.GetEnvironmentVariable("REPODB_CONSTR_MASTER", EnvironmentVariableTarget.Process);
             var connectionString = Environment.GetEnvironmentVariable("REPODB_CONSTR", EnvironmentVariableTarget.Process);
 
+            //// Master connection
+            //ConnectionStringForMaster = (connectionStringForMaster ?? @"Server=(local);Database=master;Integrated Security=False;User Id=michael;Password=Password123;");
+
+            //// RepoDb connection
+            //ConnectionStringForRepoDb = (connectionString ?? @"Server=(local);Database=RepoDb;Integrated Security=False;User Id=michael;Password=Password123;");
+
             // Master connection
-            ConnectionStringForMaster = (connectionStringForMaster ?? @"Server=(local);Database=master;Integrated Security=False;User Id=michael;Password=Password123;");
+            ConnectionStringForMaster = (connectionStringForMaster ?? @"Data Source=CHRISWA;Initial Catalog=master;Trusted_Connection=True;");
 
             // RepoDb connection
-            ConnectionStringForRepoDb = (connectionString ?? @"Server=(local);Database=RepoDb;Integrated Security=False;User Id=michael;Password=Password123;");
+            ConnectionStringForRepoDb = (connectionString ?? @"Data Source=CHRISWA;Initial Catalog=RepoDb;Trusted_Connection=True;");
+
 
             // Set the proper values for type mapper
             TypeMapper.Add(typeof(DateTime), System.Data.DbType.DateTime2, true);

RepoDb.Core/RepoDb.Tests/RepoDb.IntegrationTests/TypeConversionsTest.cs

@@ -5,6 +5,7 @@
 using System;
 using Microsoft.Data.SqlClient;
 using System.Linq;
+using RepoDb.Entity;
 
 namespace RepoDb.IntegrationTests
 {
@@ -391,15 +392,20 @@ public void TestSqlConnectionCrudConvertionFromStringToSmallMoney()
         #region StringToDateClass
 
         [Map("CompleteTable")]
-        private class StringToDateClass
+        private class StringToDateClass : BaseEntity<StringToDateClass>
         {
             [Primary]
             public Guid SessionId { get; set; }
             public string ColumnDate { get; set; }
+
+            public StringToDateClass()
+            {
+                Map(p => p.ColumnDate).Convert<DateTime, string>(o => o.ToString("M'/'d'/'yyyy h:mm:ss tt"));
+            }
         }
 
         [TestMethod]
-        public void TestSqlConnectionCrudConvertionFromStringToDate()
+        public void TestSqlConnectionCrudConversionFromStringToDate()
         {
             // Setup
             var entity = new StringToDateClass
@@ -426,15 +432,20 @@ public void TestSqlConnectionCrudConvertionFromStringToDate()
         #region StringToDateTimeClass
 
         [Map("CompleteTable")]
-        private class StringToDateTimeClass
+        private class StringToDateTimeClass : BaseEntity<StringToDateTimeClass>
         {
             [Primary]
             public Guid SessionId { get; set; }
             public string ColumnDateTime { get; set; }
+
+            public StringToDateTimeClass()
+            {
+                Map(p => p.ColumnDateTime).Convert<DateTime, string>(o => o.ToString("M'/'d'/'yyyy h:mm:ss tt"));
+            }
         }
 
         [TestMethod]
-        public void TestSqlConnectionCrudConvertionFromStringToDateTime()
+        public void TestSqlConnectionCrudConversionFromStringToDateTime()
         {
             // Setup
             var entity = new StringToDateTimeClass
@@ -461,15 +472,20 @@ public void TestSqlConnectionCrudConvertionFromStringToDateTime()
         #region StringToDateTime2Class
 
         [Map("CompleteTable")]
-        private class StringToDateTime2Class
+        private class StringToDateTime2Class : BaseEntity<StringToDateTime2Class>
         {
             [Primary]
             public Guid SessionId { get; set; }
             public string ColumnDateTime2 { get; set; }
+
+            public StringToDateTime2Class()
+            {
+                Map(p => p.ColumnDateTime2).Convert<DateTime, string>(o => o.ToString("M'/'d'/'yyyy h:mm:ss tt"));
+            }
         }
 
         [TestMethod]
-        public void TestSqlConnectionCrudConvertionFromStringToDateTime2()
+        public void TestSqlConnectionCrudConversionFromStringToDateTime2()
         {
             // Setup
             var entity = new StringToDateTime2Class

RepoDb.Core/RepoDb/Entity/BaseEntity.cs

@@ -0,0 +1,35 @@
+using System;
+using System.Linq.Expressions;
+using RepoDb.Extensions;
+using RepoDb.Interfaces;
+
+namespace RepoDb.Entity
+{
+    /// <summary>
+    /// 
+    /// </summary>
+    /// <typeparam name="TEntity"></typeparam>
+    public abstract class BaseEntity<TEntity> where TEntity : class
+    {
+        /// <summary>
+        /// 
+        /// </summary>
+        public static readonly IPropertyMap<TEntity> PropertyMap = new EntityPropertyMap<TEntity>();
+
+        static BaseEntity()
+        {
+            typeof(TEntity).GetProperties().ForEach(x => PropertyMap.Map(x));
+        }
+
+        /// <summary>
+        /// Map property by expression.
+        /// </summary>
+        /// <typeparam name="TProperty">type of the property</typeparam>
+        /// <param name="expression">mapping expression</param>
+        /// <returns>mapper</returns>
+        public IConverter Map<TProperty>(Expression<Func<TEntity, TProperty>> expression)
+        {
+            return PropertyMap.Map(expression);
+        }
+    }
+}

RepoDb.Core/RepoDb/Entity/EntityPropertyConverter.cs

@@ -0,0 +1,30 @@
+using System;
+using RepoDb.Interfaces;
+
+namespace RepoDb.Entity
+{
+    internal class EntityPropertyConverter : IConverter
+    {
+        /// <summary>
+        /// 
+        /// </summary>
+        internal object ToProperty { get; private set; }
+
+        /// <summary>
+        /// 
+        /// </summary>
+        internal object ToObject { get; private set; }
+
+        public IConverter Convert<TProperty>(Func<TProperty, object> func)
+        {
+            ToObject = func;
+            return this;
+        }
+
+        public IConverter Convert<TFrom, TProperty>(Func<TFrom, TProperty> func)
+        {
+            ToProperty = func;
+            return this;
+        }
+    }
+}

RepoDb.Core/RepoDb/Entity/EntityPropertyMap.cs

@@ -0,0 +1,94 @@
+using System;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Reflection;
+using RepoDb.Extensions;
+using RepoDb.Interfaces;
+
+namespace RepoDb.Entity
+{
+    internal class EntityPropertyMap<TEntity> : IPropertyMap<TEntity> where TEntity : class
+    {
+        private readonly IDictionary<string, IConverter> m_propertyMap = new ConcurrentDictionary<string, IConverter>();
+
+        /// <summary>
+        /// Find the sql property from the property info map.
+        /// </summary>
+        /// <param name="prop">property info</param>
+        /// <returns></returns>
+        public IConverter Find(PropertyInfo prop)
+        {
+            return m_propertyMap.TryGetValue(prop.Name, out var value) ? value : default;
+        }
+
+        /// <summary>
+        /// Map property info.
+        /// </summary>
+        /// <param name="propertyInfo"></param>
+        /// <returns></returns>
+        public IConverter Map(PropertyInfo propertyInfo)
+        {
+            var mapper = m_propertyMap.GetOrAdd(propertyInfo.Name, new EntityPropertyConverter());
+            return mapper;
+        }
+
+        /// <summary>
+        /// Map property by expression.
+        /// </summary>
+        /// <typeparam name="TProperty">type of the property</typeparam>
+        /// <param name="expression">mapping expression</param>
+        /// <returns>mapper</returns>
+        public IConverter Map<TProperty>(Expression<Func<TEntity, TProperty>> expression)
+        {
+            var info = (PropertyInfo) GetMemberInfo(expression);
+            return Map(info);
+        }
+
+        /// <summary>
+        /// Returns the <see cref="T:System.Reflection.MemberInfo"/> for the specified lambda expression.
+        /// </summary>
+        /// <param name="lambda">A lambda expression containing a MemberExpression.</param>
+        /// <returns>A MemberInfo object for the member in the specified lambda expression.</returns>
+        private static MemberInfo GetMemberInfo(LambdaExpression lambda)
+        {
+            Expression expr = lambda;
+            while (true)
+            {
+                switch (expr.NodeType)
+                {
+                    case ExpressionType.Lambda:
+                        expr = ((LambdaExpression) expr).Body;
+                        break;
+
+                    case ExpressionType.Convert:
+                        expr = ((UnaryExpression) expr).Operand;
+                        break;
+
+                    case ExpressionType.MemberAccess:
+                        var memberExpression = (MemberExpression) expr;
+                        var baseMember = memberExpression.Member;
+
+                        while (memberExpression != null)
+                        {
+                            var type = memberExpression.Type;
+                            if (type.GetMembers().Any(member => member.Name == baseMember.Name))
+                            {
+                                return type.GetMember(baseMember.Name).First();
+                            }
+
+                            memberExpression = memberExpression.Expression as MemberExpression;
+                        }
+
+                        // Make sure we get the property from the derived type.
+                        var paramType = lambda.Parameters[0].Type;
+                        return paramType.GetMember(baseMember.Name).First();
+
+                    default:
+                        return null;
+                }
+            }
+        }
+    }
+}

RepoDb.Core/RepoDb/Extensions/DictionaryExtension.cs

@@ -0,0 +1,49 @@
+using System;
+using System.Collections.Generic;
+
+namespace RepoDb.Extensions
+{
+    /// <summary>
+    /// An extension class for <see cref="IEnumerable{T}"/>.
+    /// </summary>
+    public static class DictionaryExtension
+    {
+        /// <summary>
+        /// Retrieve or add a value to dictionary
+        /// </summary>
+        /// <typeparam name="TK">key type</typeparam>
+        /// <typeparam name="TV">value type</typeparam>
+        /// <param name="dictionary">dictionary</param>
+        /// <param name="key">key value</param>
+        /// <param name="value">value</param>
+        /// <returns>value</returns>
+        public static TV GetOrAdd<TK, TV>(this IDictionary<TK, TV> dictionary, TK key, TV value)
+        {
+            if (!dictionary.ContainsKey(key))
+            {
+                dictionary.Add(key, value);
+            }
+
+            return dictionary[key];
+        }
+
+        /// <summary>
+        /// Retrieve or add a value to dictionary via add function.
+        /// </summary>
+        /// <typeparam name="TK">key type</typeparam>
+        /// <typeparam name="TV">value type</typeparam>
+        /// <param name="dictionary">dictionary</param>
+        /// <param name="key">key value</param>
+        /// <param name="addFunc">add function returning the value</param>
+        /// <returns>value</returns>
+        public static TV GetOrAdd<TK, TV>(this IDictionary<TK, TV> dictionary, TK key, Func<TV> addFunc)
+        {
+            if (!dictionary.ContainsKey(key))
+            {
+                dictionary.Add(key, addFunc());
+            }
+
+            return dictionary[key];
+        }
+    }
+}