internal static void LoadObject <T>(T target, IDataReader dr, EntityBinder binder) where T : class, new()
{
using (dr)
{
if (dr.Read())
{
PopulateObject <T>(target, dr, binder);
}
}
}
public static EntityBinder Parse(string value)
{
Trace.WriteLine(string.Format("Dal --> Binding --> Parse {0}", new Regex(@"\s*,").Replace(value, ",")));
EntityBinder __binder = new EntityBinder();
foreach (string str in value.Split(new char[] { ';' }, StringSplitOptions.RemoveEmptyEntries))
{
__binder.Add(new BindItem(str));
}
return(__binder);
}
private static T PopulateObject <T>(T target, IDataReader dr, EntityBinder binder) where T : class, new()
{
using (dr)
{
if (binder.FillObjectDelegate == null)
{
binder.FillObjectDelegate = MakeFillObjectDelegate <T>(binder);
}
((FillObjectDelegate <T>)binder.FillObjectDelegate)(target, dr);
return(target);
}
}
private static FillObjectDelegate <T> MakeFillObjectDelegate <T>(EntityBinder binder)
{
System.Type[] parameterTypes = new System.Type[] { typeof(T), typeof(IDataRecord) };
DynamicMethod method = new DynamicMethod("", typeof(T), parameterTypes, typeof(T), true);
ILGenerator iLGenerator = method.GetILGenerator();
using (List <BindItem> .Enumerator enumerator = binder.bindItems().GetEnumerator())
{
while (true)
{
if (!enumerator.MoveNext())
{
break;
}
BindItem current = enumerator.Current;
Label label = iLGenerator.DefineLabel();
iLGenerator.Emit(OpCodes.Ldarg_1);
iLGenerator.Emit(OpCodes.Ldc_I4, current.DbIndex);
iLGenerator.Emit(OpCodes.Callvirt, typeof(IDataRecord).GetMethod("IsDBNull"));
iLGenerator.Emit(OpCodes.Brtrue, label);
iLGenerator.Emit(OpCodes.Ldarg_0);
iLGenerator.Emit(OpCodes.Ldarg_1);
iLGenerator.Emit(OpCodes.Ldc_I4, current.DbIndex);
parameterTypes = new System.Type[] { typeof(int) };
iLGenerator.Emit(OpCodes.Callvirt, typeof(IDataRecord).GetMethod("get_Item", parameterTypes));
if (current.DbType == BindItem.Type.TypeByteArray)
{
iLGenerator.Emit(OpCodes.Unbox_Any, typeof(byte[]));
}
else if (current.DbType == BindItem.Type.TypeInteger)
{
iLGenerator.Emit(OpCodes.Unbox_Any, typeof(int));
}
else if (current.DbType == BindItem.Type.TypeDouble)
{
iLGenerator.Emit(OpCodes.Unbox_Any, typeof(double));
}
else if (current.DbType == BindItem.Type.TypeDecimal)
{
iLGenerator.Emit(OpCodes.Unbox_Any, typeof(decimal));
}
else if (current.DbType == BindItem.Type.TypeBoolean)
{
iLGenerator.Emit(OpCodes.Unbox_Any, typeof(bool));
}
else if (current.DbType == BindItem.Type.TypeDate)
{
iLGenerator.Emit(OpCodes.Unbox, typeof(System.DateTime));
iLGenerator.Emit(OpCodes.Ldstr, "dd/MM/yyyy HH:mm:ss.fff");
parameterTypes = new System.Type[] { typeof(string) };
iLGenerator.Emit(OpCodes.Callvirt, typeof(System.DateTime).GetMethod("ToString", parameterTypes));
//iLGenerator.Emit(OpCodes.Callvirt, typeof(object).GetMethod("ToString", System.Type.EmptyTypes));
}
iLGenerator.Emit(OpCodes.Stfld, typeof(T).GetField(current.DomainFieldName, BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.IgnoreCase));
iLGenerator.MarkLabel(label);
}
}
iLGenerator.Emit(OpCodes.Ldarg_0);
iLGenerator.Emit(OpCodes.Ret);
return((FillObjectDelegate <T>)method.CreateDelegate(typeof(FillObjectDelegate <T>)));
}
internal static Collection <T> LoadObjects <T>(Collection <T> target, IDataReader dr, EntityBinder binder, DbContext context) where T : class, new()
{
using (dr)
{
if (binder.FillObjectsDelegate == null)
{
binder.FillObjectsDelegate = MakeFillObjectsDelegate <T>(binder);
}
FillObjectsDelegate <T> fillObjectsDelegate = (FillObjectsDelegate <T>)binder.FillObjectsDelegate;
while (dr.Read())
{
target.Add(fillObjectsDelegate(dr, context));
}
return(target);
}
}
