private DynamicMethod CreateDynamicMethod()
{
DynamicMethod dm = new DynamicMethod("ObjectFromDataReader<" + this.entityType.FullName + ">", typeof(object), new Type[] { typeof(IDataReader) });
cil = dm.GetILGenerator();
// T entity = new T();
LocalBuilder entityVar = cil.DeclareLocal(this.entityType);
cil.Emit(OpCodes.Newobj, this.entityType.GetConstructor(emptyTypeArray));
cil.Emit(OpCodes.Stloc_0);
var properties = entityType.GetProperties().ToDictionary(x => x.Name);
var columnToPropertyMap = EntityMetadata.GetEntityMetadata(entityType)?.ColumnToPropertyMap;
int fieldCount = reader.FieldCount;
for (int fieldOrdinal = 0; fieldOrdinal < fieldCount; fieldOrdinal++)
{
string fieldName = reader.GetName(fieldOrdinal);
if (TryFindMappingProperty(columnToPropertyMap, properties, fieldName, out PropertyInfo pi))
{
EmitCilForOneField(fieldOrdinal, pi);
}
}
// return entity;
cil.Emit(OpCodes.Ldloc_0);
cil.Emit(OpCodes.Ret);
return(dm);
}
public static EntityMetadata GetEntityMetadata(this Type entityType)
{
return(EntityMetadata.GetEntityMetadata(entityType));
}
