/// <summary>
/// Initializes a new instance.
/// </summary>
/// <param name="cmd">The command this instance will be associated with.</param>
protected EnumerableExecutor(IEnumerableCommand cmd)
{
if (cmd == null) throw new ArgumentNullException("command", "Command cannot be null.");
if (cmd.IsDisposed) throw new ObjectDisposedException(cmd.ToString());
if (cmd.Link.IsDisposed) throw new ObjectDisposedException("Link '{0}' of command '{1}' is disposed.".FormatWith(cmd.Link, cmd));
_Command = cmd;
}
/// <summary>
/// Invoked when disposing or finalizing this instance.
/// </summary>
/// <param name="disposing">True if the object is being disposed, false otherwise.</param>
protected override void OnDispose(bool disposing)
{
try { if (_Command != null)
{
_Command.Dispose();
}
}
catch { }
_Command = null;
base.OnDispose(disposing);
}
/// <summary>
/// Initializes a new instance.
/// </summary>
/// <param name="cmd">The command this instance will be associated with.</param>
protected EnumerableExecutor(IEnumerableCommand cmd)
{
if (cmd == null)
{
throw new ArgumentNullException("command", "Command cannot be null.");
}
if (cmd.IsDisposed)
{
throw new ObjectDisposedException(cmd.ToString());
}
if (cmd.Link.IsDisposed)
{
throw new ObjectDisposedException("Link '{0}' of command '{1}' is disposed.".FormatWith(cmd.Link, cmd));
}
_Command = cmd;
}
/// <summary>
/// Invoked when disposing or finalizing this instance.
/// </summary>
/// <param name="disposing">True if the object is being disposed, false otherwise.</param>
protected virtual void OnDispose(bool disposing)
{
if (disposing)
{
try { if (!IsDisposed) Reset(); }
catch { }
}
_Command = null;
_Schema = null;
_CurrentRecord = null;
_Converter = null;
_Started = false;
_Current = null;
_TakeOnGoing = false;
_TakeRemaining = -1;
_IsDisposed = true;
}
/// <summary>
/// Invoked when disposing or finalizing this instance.
/// </summary>
/// <param name="disposing">True if the object is being disposed, false otherwise.</param>
protected virtual void OnDispose(bool disposing)
{
if (disposing)
{
try { if (!IsDisposed)
{
Reset();
}
}
catch { }
}
_Command = null;
_Schema = null;
_CurrentRecord = null;
_Converter = null;
_Started = false;
_Current = null;
_TakeOnGoing = false;
_TakeRemaining = -1;
_IsDisposed = true;
}
/// <summary>
/// Factory method invoked to create an enumerator to execute the given enumerable
/// command.
/// </summary>
/// <param name="command">The command to execute.</param>
/// <returns>An enumerator able to execute de command.</returns>
IEnumerableExecutor IDataLink.CreateEnumerableExecutor(IEnumerableCommand command)
{
throw new NotSupportedException(
"Abstract IDataLink::{0}.CreateEnumerableExecutor(command) invoked."
.FormatWith(GetType().EasyName()));
}
/// <summary>
/// Invoked to execute this operation.
/// </summary>
internal void OnExecute(object origin = null)
{
lock (Repository.MasterLock)
{
List <object> list = null;
ChangeEntry change = null;
ChangeType changeType = MetaEntity.UberMap == null ? ChangeType.Insert : ChangeType.Update;
IEnumerableCommand cmd = null;
IRecord rec = null;
DebugEx.IndentWriteLine("\n- Preparing '{1}({0})'...", MetaEntity, changeType);
try
{
if (changeType == ChangeType.Update)
{
list = MetaEntity.GetRemovedChilds(forgetRemoved: true);
foreach (var obj in list)
{
if (obj == null)
{
continue;
}
if (object.ReferenceEquals(obj, origin))
{
continue;
}
var type = obj.GetType(); if (!type.IsClass && !type.IsInterface)
{
continue;
}
var meta = MetaEntity.Locate(obj);
var map = meta.UberMap ?? Repository.LocateUberMap(type);
if (map == null)
{
throw new NotFoundException("Cannot find map for type '{0}'.".FormatWith(type.EasyName()));
}
var op = map.Delete(obj);
try { ((IUberOperation)op).OnExecute(origin: Entity); }
finally { op.Dispose(); }
}
list.Clear(); list = null;
}
list = MetaEntity.GetDependencies(Map, MemberDependencyMode.Parent);
foreach (var obj in list)
{
if (obj == null)
{
continue;
}
if (object.ReferenceEquals(obj, origin))
{
continue;
}
var type = obj.GetType(); if (!type.IsClass && !type.IsInterface)
{
continue;
}
var meta = MetaEntity.Locate(obj);
var map = meta.UberMap ?? Repository.LocateUberMap(type);
if (map == null)
{
throw new NotFoundException("Cannot find map for type '{0}'.".FormatWith(type.EasyName()));
}
if (meta.DoesMetaNeedSave(true, origin: Entity))
{
var op = map.Save(obj);
try { ((IUberOperation)op).OnExecute(origin: Entity); }
finally { op.Dispose(); }
}
else
{
change = new ChangeEntry(ChangeType.Refresh, map, obj);
Repository.ChangeEntries.Add(change);
}
}
if (changeType == ChangeType.Insert)
{
cmd = Map.GenerateInsertCommand(Entity);
if (cmd == null)
{
throw new CannotCreateException("Cannot create an insert command for '{0}'.".FormatWith(MetaEntity));
}
DebugEx.IndentWriteLine("\n- Executing '{0}'...", cmd);
try
{
rec = (IRecord)cmd.First();
if (rec == null)
{
throw new CannotExecuteException("Cannot execute '{0}'.".FormatWith(cmd));
}
}
finally { DebugEx.Unindent(); }
MetaEntity.Record = rec;
Map.LoadEntity(rec, Entity);
MetaEntity.UberMap = Map; if (Map.TrackEntities)
{
Map.MetaEntities.Add(MetaEntity);
}
MetaEntity.Completed = false;
change = new ChangeEntry(ChangeType.Insert, Map, Entity);
Repository.ChangeEntries.Add(change);
}
else if (changeType == ChangeType.Update)
{
cmd = Map.GenerateUpdateCommand(Entity); if (cmd != null)
{
DebugEx.IndentWriteLine("\n- Executing '{0}'...", cmd);
try
{
MetaEntity.ValidateRowVersion();
rec = (IRecord)cmd.First();
if (rec == null)
{
throw new CannotExecuteException("Cannot execute '{0}'.".FormatWith(cmd));
}
}
finally { DebugEx.Unindent(); }
MetaEntity.Record = rec;
Map.LoadEntity(rec, Entity);
MetaEntity.Completed = false;
change = new ChangeEntry(ChangeType.Update, Map, Entity);
Repository.ChangeEntries.Add(change);
}
else
{
change = new ChangeEntry(ChangeType.Refresh, Map, Entity);
Repository.ChangeEntries.Add(change);
}
}
list = MetaEntity.GetDependencies(Map, MemberDependencyMode.Child);
foreach (var obj in list)
{
if (obj == null)
{
continue;
}
if (object.ReferenceEquals(obj, origin))
{
continue;
}
var type = obj.GetType(); if (!type.IsClass && !type.IsInterface)
{
continue;
}
var meta = MetaEntity.Locate(obj);
var map = meta.UberMap ?? Repository.LocateUberMap(type);
if (map == null)
{
throw new NotFoundException("Cannot find map for type '{0}'.".FormatWith(type.EasyName()));
}
if (meta.DoesMetaNeedSave(cascade: true))
{
var op = map.Save(obj);
try { ((IUberOperation)op).OnExecute(origin: Entity); }
finally { op.Dispose(); }
}
else
{
change = new ChangeEntry(ChangeType.Refresh, map, obj);
Repository.ChangeEntries.Add(change);
}
}
list.Clear(); list = null;
}
finally
{
if (cmd != null)
{
cmd.Dispose();
}
cmd = null;
if (list != null)
{
list.Clear();
}
list = null;
DebugEx.Unindent();
}
}
}
/// <summary>
/// Factory method invoked to create an enumerator to execute the given enumerable
/// command.
/// </summary>
/// <param name="command">The command to execute.</param>
/// <returns>An enumerator able to execute de command.</returns>
IEnumerableExecutor IDataLink.CreateEnumerableExecutor(IEnumerableCommand command)
{
throw new NotSupportedException(
"Abstract IDataLink::{0}.CreateEnumerableExecutor(command) invoked."
.FormatWith(GetType().EasyName()));
}