/// <summary>
/// Store a new object in a persistent storage.
/// </summary>
/// <param name="oid"></param>
/// <param name="appObject"></param>
/// <returns></returns>
public bool Put(ObjectIdentifier oid, Object appObject)
{
bool success = PutObjectInStorage(oid, appObject);
IPersistable pObject = MakePersistable(appObject, oid);
_cachedObjects.Add(oid, pObject);
return success;
}
/// <summary>
/// Retrieve a persistent object from a storage.
/// </summary>
/// <param name="oid"></param>
/// <returns></returns>
public IPersistable Get(ObjectIdentifier oid)
{
IPersistable obj = _cachedObjects[oid];
if (obj == null)
{
obj = GetObjectFromStorage(oid);
_cachedObjects.Add(oid, obj);
}
return obj;
}
//retrieve with oid and custom command protected abstract PersistenceCommand MakeRetrieveCommand(Map map, ObjectIdentifier oid, Type type, string cmdType);
//used for Retrieve and delete with an OID and a well-known command type
public SqlServerPersistenceCommand(Map map, ObjectIdentifier oid, SqlCommand command, CRUD cmdType)
: base(map, oid, command, cmdType)
{
}
//update and object with default command type (update) protected abstract PersistenceCommand MakeChangeCommand(Map map, ObjectIdentifier oid, object appObject);
protected abstract PersistenceCommand MakeDeleteCommand(Map map, ObjectIdentifier oid, string cmdType);
/// <summary>
/// Custom command for destroying a persisent object using its identifier.
/// </summary>
/// <param name="objectId"></param>
/// <param name="type"></param>
/// <param name="cmdType"></param>
/// <returns></returns>
public bool Destroy(ObjectIdentifier oid, Type type, string cmdType)
{
try
{
GetMap(type);
_cmd = MakeDeleteCommand(_map, oid, cmdType);
if (_cmd == null)
throw new Exception(NO_CMD_MAP);
return (bool)_cmd.Run();
}
catch (Exception ex)
{
throw new Exception(CANNOT_DESTROY, ex);
}
}
//ok crr 2009.10.31
/// <summary>
///Retrieve method for custom retrieve operations giving an OID.
/// </summary>
/// <param name="objectId"></param>
/// <param name="type"></param>
/// <param name="cmdType"></param>
/// <returns></returns>
public IPersistable Retrieve(ObjectIdentifier objectId, Type type, string cmdType)
{
try
{
GetMap(type);
_cmd = MakeRetrieveCommand(_map, objectId, type, cmdType);
if (_cmd == null)
throw new Exception(NO_CMD_MAP);
return (IPersistable)_cmd.Run();
}
catch (Exception ex)
{
throw new Exception(CANNOT_RETRIEVE, ex);
}
}
public abstract IPersistable MakePersistable(object persistableObj, ObjectIdentifier oid);
/// <summary>
/// Update a persistentObject using a particular Type for mapping.
/// </summary>
/// <param name="oid"></param>
/// <param name="appObject"></param>
/// <param name="mapType"></param>
/// <returns></returns>
public bool Change(ObjectIdentifier oid, object appObject, Type mapType)
{
try
{
GetMap(mapType);
//make the specific command to execute an Update
_cmd = MakeChangeCommand(_map, oid, appObject);
if (_cmd == null)
throw new Exception(NO_CMD_MAP);
//Command Pattern: A request is encapsulated in a class.
//Subtypes will take into account the concurrency support
return (bool)_cmd.Run();
}
catch (Exception ex)
{
throw new Exception(CANNOT_UPDATE, ex);
}
}
/// <summary>
/// Destroy a persistent object in a storage.
/// </summary>
/// <param name="oid"></param>
/// <returns></returns>
public bool Destroy(ObjectIdentifier oid)
{
bool success = DestroyObjectInStorage(oid);
_cachedObjects.Remove(oid);
return success;
}
//used for Retrieve and Delete with an OID, a custom command type and concurrency support
public SqlServerPersistenceCommand(Map map, ObjectIdentifier oid, SqlCommand command, string cmdType, ConcurrencySupportType concurrency)
: base(map, oid, command, cmdType, concurrency)
{
}
//create protected abstract bool PutObjectInStorage(ObjectIdentifier oid, Object appObject);
protected abstract IPersistable MakePersistable(object appObject, ObjectIdentifier oid);
//retrieve protected abstract IPersistable GetObjectFromStorage(ObjectIdentifier oid);
//delete protected abstract bool DestroyObjectInStorage(ObjectIdentifier oid);
//TEST
/// <summary>
/// PersistentCommand for new records with identifier.
/// </summary>
/// <param name="map"></param>
/// <param name="oid"></param>
/// <param name="objectForProcess"></param>
/// <param name="providerCommand"></param>
public PersistenceCommand(Map map, ObjectIdentifier oid,object objectForProcess, object providerCommand)
{
_providerCommand = providerCommand;
_objectForProcess = objectForProcess;
_pObj = MakePersistable(objectForProcess, oid);
_cmdMap = map.GetCommandMap(CRUD.Create.ToString());
}
public override IPersistable MakePersistable(object persistableObj, ObjectIdentifier oid)
{
return new PersistentObject(persistableObj, oid);
}
/// <summary>
/// PersistentObject for retrieve operations, custom command and concurrency support.
/// </summary>
/// <param name="map"></param>
/// <param name="oid"></param>
/// <param name="providerCommand"></param>
/// <param name="cmdType"></param>
/// <param name="concurrency"></param>
public PersistenceCommand(Map map, ObjectIdentifier oid, object providerCommand, string cmdType, ConcurrencySupportType concurrency)
{
_providerCommand = providerCommand;
_pObj = MakePersistable(null, oid);// Retrieve operations need only the OID
_cmdMap = map.GetCommandMap(cmdType); //must get the proper command instruction from the map
SetConcurrencySupport(concurrency);
}
