public static SetInstanceValuesDelegate GetSetInstanceValuesDelegate(IndexedSqlDataReader reader)
{
return(_setInstanceValuesDelegateCache.GetOrAdd(reader.GetCacheId(), (id) =>
{
return Model.GenerateSetInstanceValuesDelegate(reader);
}));
}
public static T Statement <T>(String statement, dynamic parameters = null, String connectionName = null)
{
using (var cmd = Command(connectionName))
{
cmd.CommandType = System.Data.CommandType.Text;
cmd.CommandText = statement;
if (parameters != null)
{
Utility.AddParametersToCommand(parameters, cmd);
}
var type = typeof(T);
using (var dr = new IndexedSqlDataReader(cmd.ExecuteReader(CommandBehavior.CloseConnection)))
{
if (dr.Read())
{
if (type.IsValueType || type.Equals(typeof(String)) || type.Equals(typeof(DateTime)))
{
return(dr.Get <T>(0));
}
return(dr.ReadObject <T>(returnNullOnEmpty: true));
}
else
{
return(default(T));
}
}
}
}
public void Populate(IndexedSqlDataReader dr)
{
this.Name = dr.Get <String>("name");
this.CanBeNull = dr.Get <Boolean>("is_nullable");
this.MaxStringLength = dr.Get <Int32>("max_length");
this.IsAutoIdentity = dr.Get <Boolean>("is_identity");
this.IsPrimaryKey = dr.Get <Boolean>("is_primarykey");
}
public static void Populate(object instance, IndexedSqlDataReader dr)
{
var thisType = instance.GetType();
var members = ModelCache.GetColumnMemberLookup(thisType);
foreach (var col in members.Values)
{
col.SetValue(instance, dr.Get(col));
}
}
private IEnumerable <T> _fastPipeline()
{
var connectionName = Model.ConnectionName(_t);
using (var cmd = Destrier.Execute.Command(connectionName))
{
cmd.CommandText = this.QueryBody;
cmd.CommandType = System.Data.CommandType.Text;
Destrier.Execute.Utility.AddParametersToCommand(_parameters, cmd, connectionName);
using (var dr = new IndexedSqlDataReader(cmd.ExecuteReader(System.Data.CommandBehavior.CloseConnection), type: _t))
{
while (dr.Read())
{
T newObject = (T)ReflectionHelper.GetNewObject(_t);
dr.DeepPopulate(newObject, _t);
yield return(newObject);
}
}
}
}
/// <summary>
/// Throws a data exception produced by the _setInstanceValuesFn.
/// </summary>
/// <param name="ex"></param>
/// <param name="columnIndex"></param>
/// <param name="instance"></param>
/// <param name="reader"></param>
public static void ThrowDataException(Exception ex, Int32 columnIndex, Object instance, IndexedSqlDataReader reader)
{
Exception toThrow;
try
{
string name = "-";
string value = "-";
string memberName = "-";
string memberType = "-";
if (reader != null && columnIndex >= 0 && columnIndex < reader.FieldCount)
{
name = reader.GetName(columnIndex);
object val = reader.GetValue(columnIndex);
if (val == null || val is DBNull)
{
value = "null";
}
else
{
value = Convert.ToString(val) + " as " + Type.GetTypeCode(val.GetType());
}
if (reader.ColumnMemberIndexMap != null && reader.ColumnMemberIndexMap.Any())
{
memberName = reader.ColumnMemberIndexMap[columnIndex].Name;
memberType = reader.ColumnMemberIndexMap[columnIndex].Type.ToString();
}
}
toThrow = new DataException(String.Format("Exception reading column {0}: ({1} = {2}) for {3} as {4})", columnIndex, name, value, memberName, memberType), ex);
}
catch
{
toThrow = new DataException(ex.Message, ex);
}
throw toThrow;
}
/// <summary>
/// Implementation of Populate.
/// </summary>
/// <param name="dr"></param>
public void Populate(IndexedSqlDataReader dr)
{
this.TableName = dr.Get <String>("name");
}
public static SetInstanceValuesDelegate GenerateSetInstanceValuesDelegate(IndexedSqlDataReader dr)
{
Type idr = typeof(IndexedSqlDataReader);
var idr_methods = new Dictionary <String, MethodInfo>();
foreach (var mi in idr.GetMethods())
{
if (mi.Name.StartsWith("Get") || mi.Name == "IsDBNull")
{
if (!idr_methods.ContainsKey(mi.Name))
{
idr_methods.Add(mi.Name, mi);
}
}
}
var get_value_fn = idr_methods["GetValue"];
var get_guid_fn = idr_methods["GetGuid"];
var is_dbnull = idr_methods["IsDBNull"];
//use this with the type code on the dr field.
var type_accessors = new Dictionary <TypeCode, MethodInfo>()
{
{ TypeCode.Boolean, idr_methods["GetBoolean"] },
{ TypeCode.DateTime, idr_methods["GetDateTime"] },
{ TypeCode.UInt16, idr_methods["GetInt16"] },
{ TypeCode.Int16, idr_methods["GetInt16"] },
{ TypeCode.UInt32, idr_methods["GetInt32"] },
{ TypeCode.Int32, idr_methods["GetInt32"] },
{ TypeCode.UInt64, idr_methods["GetInt64"] },
{ TypeCode.Int64, idr_methods["GetInt64"] },
{ TypeCode.Single, idr_methods["GetDouble"] },
{ TypeCode.Double, idr_methods["GetDouble"] },
{ TypeCode.Decimal, idr_methods["GetDecimal"] },
{ TypeCode.String, idr_methods["GetString"] },
{ TypeCode.Char, idr_methods["GetString"] },
{ TypeCode.Byte, idr_methods["GetByte"] }
};
DynamicMethod dyn = new DynamicMethod("SetInstanceValues", typeof(void), new Type[] { typeof(IndexedSqlDataReader), typeof(object) });
ILGenerator il = dyn.GetILGenerator();
var defaults = new Dictionary <TypeCode, Action>()
{
{ TypeCode.Boolean, () => { il.Emit(OpCodes.Ldc_I4_0); } },
{ TypeCode.Int16, () => { il.Emit(OpCodes.Ldc_I4_0); } },
{ TypeCode.UInt16, () => { il.Emit(OpCodes.Ldc_I4_0); } },
{ TypeCode.Int32, () => { il.Emit(OpCodes.Ldc_I4_0); } },
{ TypeCode.UInt32, () => { il.Emit(OpCodes.Ldc_I4_0); } },
{ TypeCode.Int64, () => { il.Emit(OpCodes.Ldc_I8, 0); } },
{ TypeCode.UInt64, () => { il.Emit(OpCodes.Ldc_I8, 0); } },
{ TypeCode.Single, () => { il.Emit(OpCodes.Ldc_R4, 0.0f); } },
{ TypeCode.Double, () => { il.Emit(OpCodes.Ldc_R8, 0.0d); } },
{ TypeCode.String, () => { il.Emit(OpCodes.Ldnull); } },
};
var on_stack_conversions = new Dictionary <TypeCode, Action>()
{
{ TypeCode.Boolean, () => { il.Emit(OpCodes.Conv_Ovf_I4); } },
{ TypeCode.Int32, () => { il.Emit(OpCodes.Conv_Ovf_I4); } },
{ TypeCode.SByte, () => { il.Emit(OpCodes.Conv_Ovf_I1); } },
{ TypeCode.Byte, () => { il.Emit(OpCodes.Conv_Ovf_I1_Un); } },
{ TypeCode.Int16, () => { il.Emit(OpCodes.Conv_Ovf_I2); } },
{ TypeCode.UInt16, () => { il.Emit(OpCodes.Conv_Ovf_I2_Un); } },
{ TypeCode.UInt32, () => { il.Emit(OpCodes.Conv_Ovf_I4_Un); } },
{ TypeCode.Int64, () => { il.Emit(OpCodes.Conv_Ovf_I8); } },
{ TypeCode.UInt64, () => { il.Emit(OpCodes.Conv_Ovf_I8_Un); } },
{ TypeCode.Single, () => { il.Emit(OpCodes.Conv_R4); } },
{ TypeCode.Double, () => { il.Emit(OpCodes.Conv_R8); } },
};
il.BeginExceptionBlock();
var col_index = il.DeclareLocal(typeof(int));
int index = 0;
foreach (var c in dr.ColumnMemberIndexMap)
{
il.Emit(OpCodes.Ldc_I4, index);
il.Emit(OpCodes.Stloc, col_index.LocalIndex);
var setMethod = c.Property.GetSetMethod();
if (c.IsNullableType)
{
var nullable_local = il.DeclareLocal(c.Property.PropertyType);
var underlyingType = c.UnderlyingGenericType;
var origin = dr.GetFieldType(index);
var originType = Type.GetTypeCode(origin);
var nullable_constructor = c.Type.GetConstructors().First();
var was_not_null = il.DefineLabel();
var set_column = il.DefineLabel();
//load up our object .. again.
il.Emit(OpCodes.Ldarg_1);
il.Emit(OpCodes.Castclass, c.Property.DeclaringType);
//test if it was null
il.Emit(OpCodes.Ldarg_0);
_emitInt32(il, index);
il.Emit(OpCodes.Callvirt, is_dbnull);
il.Emit(OpCodes.Brfalse_S, was_not_null);
//new up a nullable<t>
il.Emit(OpCodes.Ldloca_S, nullable_local.LocalIndex);
il.Emit(OpCodes.Initobj, c.Type);
il.Emit(OpCodes.Ldloc, nullable_local.LocalIndex);
il.Emit(OpCodes.Br_S, set_column);
//grab the value
il.MarkLabel(was_not_null);
il.Emit(OpCodes.Ldarg_0);
_emitInt32(il, index);
MethodInfo get_value = null;
if (type_accessors.ContainsKey(originType))
{
get_value = type_accessors[originType];
}
else if (origin == typeof(Guid))
{
get_value = get_guid_fn;
}
else
{
get_value = get_value_fn;
}
il.EmitCall(OpCodes.Callvirt, get_value, null);
il.Emit(OpCodes.Newobj, nullable_constructor);
il.MarkLabel(set_column);
il.EmitCall(OpCodes.Callvirt, setMethod, null);
}
else
{
var origin = dr.GetFieldType(index);
var originType = Type.GetTypeCode(origin);
var destinationType = Type.GetTypeCode(c.Type);
var was_not_null = il.DefineLabel();
var set_column = il.DefineLabel();
il.Emit(OpCodes.Ldarg_1);
il.Emit(OpCodes.Castclass, c.Property.DeclaringType);
if (!c.ColumnAttribute.IsPrimaryKey && c.ColumnAttribute.CanBeNull)
{
il.Emit(OpCodes.Ldarg_0);
_emitInt32(il, index);
il.Emit(OpCodes.Callvirt, is_dbnull);
il.Emit(OpCodes.Brfalse_S, was_not_null);
//new up a default(T)
if (defaults.ContainsKey(destinationType))
{
defaults[destinationType]();
}
else
{
var local = il.DeclareLocal(c.Property.PropertyType);
il.Emit(OpCodes.Ldloca_S, local.LocalIndex);
il.Emit(OpCodes.Initobj, c.Property.PropertyType);
il.Emit(OpCodes.Ldloc, local.LocalIndex);
}
il.Emit(OpCodes.Br_S, set_column);
il.MarkLabel(was_not_null);
}
//get the value
il.Emit(OpCodes.Ldarg_0);
_emitInt32(il, index);
MethodInfo get_value = null;
if (type_accessors.ContainsKey(originType))
{
get_value = type_accessors[originType];
}
else if (origin == typeof(Guid))
{
get_value = get_guid_fn;
}
else
{
get_value = get_value_fn;
}
il.EmitCall(OpCodes.Callvirt, get_value, null);
if (originType != destinationType)
{
//we need to cast ...
if (destinationType == TypeCode.String)
{
var to_s = _getToStringForType(origin);
var local = il.DeclareLocal(origin);
il.Emit(OpCodes.Stloc, local.LocalIndex);
il.Emit(OpCodes.Ldloca_S, local.LocalIndex);
il.Emit(OpCodes.Call, to_s);
}
else
{
if (on_stack_conversions.ContainsKey(destinationType))
{
on_stack_conversions[destinationType]();
}
else //failsafe if we end up here, though doubtful ...
{
il.Emit(OpCodes.Newobj, c.Type);
}
}
}
else if (originType == destinationType && c.Type.Equals(typeof(Byte[])))
{
il.Emit(OpCodes.Castclass, typeof(Byte[]));
}
il.MarkLabel(set_column);
il.EmitCall(OpCodes.Callvirt, setMethod, null);
}
index++;
}
var endLabel = il.DefineLabel();
il.BeginCatchBlock(typeof(Exception));
il.Emit(OpCodes.Ldloc, col_index.LocalIndex);
il.Emit(OpCodes.Ldarg_1);
il.Emit(OpCodes.Ldarg_0);
il.EmitCall(OpCodes.Call, idr.GetMethod("ThrowDataException"), null);
il.EndExceptionBlock();
il.MarkLabel(endLabel);
il.Emit(OpCodes.Nop);
il.Emit(OpCodes.Ret);
return((SetInstanceValuesDelegate)dyn.CreateDelegate(typeof(SetInstanceValuesDelegate)));
}
private IEnumerable <T> _slowPipeline()
{
var list = new List <T>();
var connectionName = Model.ConnectionName(_t);
using (var cmd = Destrier.Execute.Command(connectionName))
{
cmd.CommandText = this.QueryBody;
cmd.CommandType = System.Data.CommandType.Text;
Destrier.Execute.Utility.AddParametersToCommand(_parameters, cmd, connectionName);
using (var dr = new IndexedSqlDataReader(cmd.ExecuteReader(System.Data.CommandBehavior.CloseConnection), type: _t))
{
var objectLookups = new Dictionary <Type, Dictionary <Object, Object> >();
var parentDict = new Dictionary <Object, Object>();
objectLookups.Add(_t, parentDict);
while (dr.Read())
{
var newObject = (T)ReflectionHelper.GetNewObject(_t);
dr.DeepPopulate(newObject, objectLookups: objectLookups, thisType: _t);
list.Add(newObject);
}
if (_builder.ChildCollections.Any())
{
foreach (var cm in _builder.ChildCollections.Where(cm => !cm.IsLazy))
{
var root = cm.Root;
var parent = cm.Parent ?? cm.Root;
var referencedParentPrimaryKey = cm.ReferencedProperty;
dr.NextResult(cm.CollectionType);
if (!objectLookups.ContainsKey(cm.CollectionType))
{
objectLookups.Add(cm.CollectionType, new Dictionary <Object, Object>());
}
dr.ReadIntoParentCollection(cm.CollectionType, (reader, obj) =>
{
var pkValue = referencedParentPrimaryKey.GetValue(obj);
var pkValueAsString = pkValue != null ? pkValue.ToString() : null;
var objPrimaryKeys = Model.ColumnsPrimaryKey(cm.CollectionType);
object objPrimaryKeyValue = Model.InstancePrimaryKeyValue(cm.CollectionType, obj);
object parentObj = null;
objectLookups[cm.DeclaringType].TryGetValue(pkValueAsString, out parentObj);
if (parentObj != null)
{
var parentCollectionProperty = cm.Property;
//new up the collection if it hasn't been delcared yet.
if (parentCollectionProperty.GetValue(parentObj) == null)
{
parentCollectionProperty.SetValue(parentObj, ReflectionHelper.GetNewObject(cm.Type));
}
//set up lookup for the object
Dictionary <Object, Object> objLookup = null;
objectLookups.TryGetValue(cm.CollectionType, out objLookup);
if (objLookup != null && objPrimaryKeyValue != null)
{
if (!objLookup.ContainsKey(objPrimaryKeyValue))
{
objLookup.Add(objPrimaryKeyValue, obj);
}
else
{
obj = objLookup[objPrimaryKeyValue];
}
}
var collection = parentCollectionProperty.GetValue(parentObj);
((System.Collections.IList)collection).Add(obj);
}
}, populateFullResults: true, advanceToNextResultAfter: false, objectLookups: objectLookups);
}
}
}
}
return(list);
}
