public MTMRelationInfo(String tableName, PropertyInfo OwnMTMProp)
{
this.tableName = tableName;
this.OwnMTMProp = OwnMTMProp;
this.OppType = OwnMTMProp.PropertyType.GetGenericArguments()[0];
this.OppMTMProp = this.OppType.GetProperty(CustomAttr.GetMTMTargetAndTable(OwnMTMProp).Item1);
}
/// <summary>
/// (Read)Fills the 'one' side of OTM relations for each request
/// </summary>
public bool FillOTM()
{
bool result = false;
while (OTMReqList.Count() > 0)
{
result = true;
Tuple <object, PropertyInfo> request = OTMReqList[0];
int id = (int)request.Item1.GetType().GetProperty("id").GetValue(request.Item1);
String otm_target = CustomAttr.GetOTMTarget(request.Item2);
List <T> filtered = new List <T>();
foreach (T record in allRecords)
{
BaseClass target = (BaseClass)record.GetType().GetProperty(otm_target).GetValue(record);
if (target == null)
{
continue;
}
if (target.id == id)
{
IList list = request.Item1.GetType().GetProperty(request.Item2.Name).GetValue(request.Item1) as IList;
list.Add(record);
}
}
OTMReqList.RemoveAt(0);
}
return(result);
}
/// <summary>
/// Reads a single property from the file. Used in readsinglerecord method.
/// </summary>
/// <param name="br">BinaryReader that has been created before.</param>
/// <param name="primitiveInfos">To check where the current info belongs</param>
/// <param name="customInfos">To check where the current info belongs</param>
/// <param name="info">İnfo to be read</param>
/// <returns>Returns the read value in object form</returns>
public static object ReadSingleProperty(BinaryReader br, Type ty, PropertyInfo info)
{
BaseClass trash = (BaseClass)Activator.CreateInstance(ty);
Type t = info.PropertyType;
if (trash.OTORelInfos().Contains(info))
{
return(br.ReadInt32());
}
else if (t == typeof(String))
{
CustomAttr.MaxLengthAttr lengthAttr
= (CustomAttr.MaxLengthAttr)
CustomAttr.GetAttribute(typeof(CustomAttr.MaxLengthAttr), info);
return(RemoveFiller(new string(br.ReadChars(lengthAttr.MaxLength + delimiter.Length)), delimiter));
}
else if (t == typeof(bool))
{
return(br.ReadBoolean());
}
else if (t == typeof(int))
{
return(br.ReadInt32());
}
else if (t == typeof(DateTime))
{
return(DateTime.Parse(new string(br.ReadChars(10))));
}
return(null); //exception
}
public static int CalculateRowByteSize(List <PropertyInfo> infos, List <PropertyInfo> customInfos, List <PropertyInfo> primitiveInfos)
{
int total = 0;
foreach (PropertyInfo info in infos)
{
if (customInfos.Contains(info))
{
total += sizeof(int); //foreign key
}
else if (info.PropertyType == typeof(Boolean))
{
total += 1; //marshal 4 döndürüyor, yanlışsın marshal.
//dosyaya yazarken booleanlar 1 yer kaplıyor.
}
else if (info.PropertyType == typeof(String))
{
total += CustomAttr.GetLength(info) + delimiter.Length;
}
else if (info.PropertyType.IsGenericType)
{
continue;
}
else
{
total += System.Runtime.InteropServices.Marshal.SizeOf(info.PropertyType);
}
}
return(total);
}
/// <summary>
/// Writes a single property to the file. Used in Add method, iterating through all properties.
/// </summary>
/// <param name="bw">BinaryWriter that has been created before</param>
/// <param name="info">İnfo to be written</param>
/// <param name="o">The object the info belongs to.</param>
public static void WriteSingleProperty(BinaryWriter bw, PropertyInfo info, object o)
{
object value = o;
Type t = info.PropertyType;
if (t == typeof(String))
{
bw.Write(FillString((String)value, delimiter, CustomAttr.GetLength(info)).ToCharArray());
}
else if (t == typeof(bool))
{
bw.Write((bool)value);
}
else if (t == typeof(int))
{
bw.Write((int)value);
}
else if (t == typeof(DateTime))
{
char[] charArray = ((DateTime)value).ToString().ToCharArray();
bw.Write(charArray);
}
else if (t == typeof(long))
{
bw.Write((long)value);
}
else if (t == typeof(byte[]))
{
bw.Write((byte[])value);
}
//else if custom info
}
/// <summary>
/// Adds given record to update-queue, to be updated in SaveChanges operation. Also checks for inner properties' relationships.
/// </summary>
/// <param name="record">Record to be analyzed and updated.</param>
public void Update(T record)
{
if (CustomAttr.Validator(record)) //Checks the attributes
{
CheckInside(record, "Update");
ProcessMTM(record);
this.Updates.Add(record);
}
}
public BaseClass()
{
String name = this.GetType().Name;
if (!InheritedTypes.ContainsKey(name))
{
InheritedTypes.Add(name, this.GetType());
AllPrimitiveInfos.Add(name, new List <PropertyInfo>());
AllOTORelInfos.Add(name, new List <PropertyInfo>());
AllOTM_One.Add(name, new List <PropertyInfo>());
AllOrderedInfos.Add(name, new List <PropertyInfo>());
AllMTMInfoList.Add(name, new List <MTMRelationInfo>());
List <PropertyInfo> infos = this.GetType().GetProperties().ToList();
foreach (PropertyInfo info in infos)
{
if (info.PropertyType.IsSubclassOf(typeof(BaseClass)))
{
AllOTORelInfos[name].Add(info);
AllOrderedInfos[name].Add(info);
}
else if (info.PropertyType.IsGenericType)
{
if (CustomAttr.GetOTMTarget(info) != null)
{
AllOTM_One[name].Add(info);
}
else
{
Tuple <string, string> Target_Table = CustomAttr.GetMTMTargetAndTable(info);
if (Target_Table != null)
{
Type targetType = info.PropertyType.GetGenericArguments()[0];
PropertyInfo targetInfo = info.PropertyType.GetGenericArguments()[0].GetProperty(Target_Table.Item1);
if (!AllMTMRelations.Any(e => e.Key == Target_Table.Item2)) //tablo adına göre kontrol ediyor
{
AllMTMRelations.Add(
Target_Table.Item2, new Tuple <Type, Type>(this.GetType(), targetType)
);
}
AllMTMInfoList[name].Add(new MTMRelationInfo(Target_Table.Item2, info));
}
}
}
else
{
AllPrimitiveInfos[name].Add(info);
AllOrderedInfos[name].Add(info);
}
}
RowSizes.Add(name, FileOps.CalculateRowByteSize(OrderedInfos(), OTORelInfos(), PrimitiveInfos()));
}
}
/// <summary>
/// Adds given record to add-queue, to be added in SaveChanges operation. Also checks for inner properties' relationships.
/// </summary>
/// <param name="record">Record to add.</param>
public void Add(T record)
{
if (CustomAttr.Validator(record)) //Checks the attributes
{
CheckInside(record, "Add"); //içteki OTO ve OTM ilişkileri işler.
ProcessMTM(record); //içteki MTM ilişkileri işler.
}
if (allRecords.Contains(record))
{
return;
}
recordsToAddDirectly.Add(record);
}
/// <summary>
/// Adds the record to addaschild-queue to be added in SaveChanges operation. Record will be given an id, and the parent will be updated with the id as foreign key in data tables.
/// </summary>
/// <param name="owner">Owner of the record.</param>
/// <param name="record">Record.</param>
public void AddAsChild(BaseClass owner, BaseClass record)
{
//add'in içindeki işlemler. bunun da içinde çocuk nesne olabilir.
if (CustomAttr.Validator(record)) //Checks the attributes
{
CheckInside((T)record, "AddAsChild");
ProcessMTM((T)record);
}
if (allRecords.Contains((T)record))
{
return;
}
recordsToAddAsOTO.Add(new Tuple <object, object>(owner, record));
}
public static void MakeReferenceNull(Stream mainFile, PropertyInfo info, Type T, Dictionary <int, List <int> > toChange)
{
//ToChange:
//key = silinecek id
//list int = key'e eskiden referans eden kayıtlar
BaseClass trash = (BaseClass)Activator.CreateInstance(T);
int total = 0;
foreach (PropertyInfo orderedInfo in trash.OrderedInfos()) //sütun kaçıncı pozisyonda bul
{
if (orderedInfo.Name.Equals(info.Name)) //yazacağımız sütunu bulduk.
{
break;
}
else
{
if (trash.OTORelInfos().Contains(orderedInfo))
{
total += sizeof(int); //foreign key
}
else if (orderedInfo.PropertyType == typeof(Boolean))
{
total += 1; //marshal 4 döndürüyor, yanlışsın marshal.
//dosyaya yazarken booleanlar 1 yer kaplıyor.
}
else if (orderedInfo.PropertyType == typeof(String))
{
total += CustomAttr.GetLength(orderedInfo) + delimiter.Length;
}
else
{
total += System.Runtime.InteropServices.Marshal.SizeOf(orderedInfo.PropertyType);
}
}
}
BinaryWriter bw = new BinaryWriter(mainFile);
foreach (KeyValuePair <int, List <int> > kp in toChange)
{
foreach (int id in kp.Value)
{
bw.BaseStream.Position = (id - 1) * trash.RowSize() + total;
bw.Write(-1);
}
}
}
/// <summary>
/// Checks inside the given record for OTO-OTM-MTM relations and processes them by sending to the corresponding dbset methods.
/// </summary>
/// <param name="record"></param>
/// <param name="mode"></param>
public void CheckInside(BaseClass record, String mode)
{
foreach (PropertyInfo info in record.GetType().GetProperties())
{
if (ctx.dbsetTypes.Any(t => t.Name == info.PropertyType.Name))
{
BaseClass childObject = (BaseClass)info.GetValue(record);
if (childObject != null)
{
if (childObject.id == 0)
{
object dbset = ctx.GetDBSetByType(childObject.GetType());
object[] parameters = { record, childObject };
dbset.GetType().GetMethod("AddAsChild").Invoke(dbset, parameters);
}
}
}
}
//one to many
foreach (PropertyInfo OTM in record.OTM_One())
{
IList list = OTM.GetValue(record) as IList;
object dbset = ctx.GetDBSetByType(OTM.PropertyType.GetGenericArguments()[0]);
foreach (BaseClass eleman in list)
{
if (eleman.id != 0)
{
PropertyInfo targetProp = eleman.GetType().GetProperty(CustomAttr.GetOTMTarget(OTM));
//bizde liste var, karşıda ise tek nesneye referans
if (targetProp.GetValue(eleman) != record)
{
targetProp.SetValue(eleman, record);
object[] parameters_update = { eleman };
object updates = dbset.GetType().GetField("Updates").GetValue(dbset); //içindeki tekrar eklenmesin diye Update fonksiyonunu pas geçtim.
updates.GetType().GetMethod("Add").Invoke(updates, parameters_update);
}
continue;
}
object[] parameters = new object[3];
parameters[0] = record;
parameters[1] = eleman;
parameters[2] = eleman.GetType().GetProperty(CustomAttr.GetOTMTarget(OTM));
dbset.GetType().GetMethod("AddAsOTM").Invoke(dbset, parameters);
}
}
}
