internal override PropagationMacroCommand PostPropagation()
        {
            ReadOnlyCollection <PSMAttribute> aX1 = Project.TranslateComponentCollection <PSMAttribute>(X1);
            ReadOnlyCollection <PSMAttribute> aX2 = Project.TranslateComponentCollection <PSMAttribute>(X2);

            if (aX1.Count == 0 || aX2.Count == 0)
            {
                return(null);
            }

            PropagationMacroCommand command = new PropagationMacroCommand(Controller)
            {
                CheckFirstOnlyInCanExecute = true
            };

            command.Report = new CommandReport("Post-propagation (synchronize PSM attribute sets)");
            PSMClass psmClass = aX2.First().PSMClass;

            if (aX1.Any(att => att.Interpretation == null) && aX2.Any(att => att.Interpretation == null))
            {
                return(command);
            }

            //Twice... X1 => X2, X2 => X1
            for (int i = 0; i < 2; i++)
            {
                if (aX1.All(att => att.Interpretation != null))
                {
                    PIMClass pimClass = (aX1.First().Interpretation as PIMAttribute).PIMClass;
                    IEnumerable <PIMAttribute> interpretations1      = aX1.Select <PSMAttribute, PIMAttribute>(a => a.Interpretation as PIMAttribute);
                    IEnumerable <PIMAttribute> interpretations2      = aX2.Where(a => a.Interpretation != null).Select <PSMAttribute, PIMAttribute>(a => a.Interpretation as PIMAttribute);
                    IEnumerable <PSMAttribute> attributesToPropagate = aX2.Where(a => a.Interpretation == null);

                    List <Guid> newAttributes = new List <Guid>();
                    foreach (PSMAttribute a in attributesToPropagate)
                    {
                        cmdCreateNewPIMAttribute c = new cmdCreateNewPIMAttribute(Controller);
                        Guid attrGuid = Guid.NewGuid();
                        c.AttributeGuid = attrGuid;
                        c.Set(pimClass, a.AttributeType, a.Name, a.Lower, a.Upper, a.DefaultValue);
                        command.Commands.Add(c);

                        acmdSetInterpretation cmdi = new acmdSetPSMAttributeInterpretation(Controller, a, attrGuid);
                        command.Commands.Add(cmdi);

                        newAttributes.Add(attrGuid);
                    }

                    IEnumerable <Guid> synchroGroup1 = pimClass.PIMAttributes.Where(a => interpretations1.Contains(a)).Select <PIMAttribute, Guid>(g => g);
                    IEnumerable <Guid> synchroGroup2 = pimClass.PIMAttributes.Where(a => interpretations2.Contains(a)).Select <PIMAttribute, Guid>(g => g).Union(newAttributes);

                    //We could somehow add PropagateSource here...
                    command.Commands.Add(new acmdSynchroPIMAttributes(Controller)
                    {
                        X1 = synchroGroup1.ToList(), X2 = synchroGroup2.ToList()
                    });
                }
                //Swap the two lists and do it again
                ReadOnlyCollection <PSMAttribute> temp = aX1;
                aX1 = aX2;
                aX2 = temp;
            }
            return(command);
        }
        private void bApply_Click(object sender, RoutedEventArgs e)
        {
            bApply.Focus();
            applyButtonPressed = true;
            error = false;

            controller.BeginMacro();
            //controller.CreatedMacro.Description = string.Format("PIM Classs '{0}' was updated. ", PIMClass);
            if (tbName.ValueChanged)
            {
                cmdRenameComponent renameCommand = new cmdRenameComponent(controller)
                {
                    ComponentGuid = PIMClass, NewName = tbName.Text
                };
                controller.CreatedMacro.Commands.Add(renameCommand);
                tbName.ForgetOldValue();
            }

            //if (PIMClass.IsAbstract != cbAbstract.IsChecked)
            //{
            //    PIMClassController.ChangeAbstract(cbAbstract.IsChecked == true);
            //}

            //if (PIMClass.AllowAnyAttribute != cbAnyAttribute.IsChecked)
            //{
            //    PIMClassController.ChangeAllowAnyAttributeDefinition(cbAnyAttribute.IsChecked == true);
            //}

            #region check for deleted attributes

            List <PIMAttribute>     removedAttributes = new List <PIMAttribute>();
            List <FakePIMAttribute> addedAttributes   = new List <FakePIMAttribute>();
            foreach (PIMAttribute PIMAttribute in PIMClass.PIMAttributes)
            {
                bool found = false;
                foreach (FakePIMAttribute fakeAttribute in fakeAttributes)
                {
                    if (fakeAttribute.SourceAttribute == PIMAttribute && fakeAttribute.Checked)
                    {
                        found = true;
                        break;
                    }
                    else if (fakeAttribute.SourceAttribute == PIMAttribute && !fakeAttribute.Checked)
                    {
                        fakeAttribute.SourceAttribute = null;
                    }
                }
                if (!found)
                {
                    removedAttributes.Add(PIMAttribute);
                    cmdDeletePIMAttribute deleteCommand = new cmdDeletePIMAttribute(controller);
                    deleteCommand.Set(PIMAttribute);
                    controller.CreatedMacro.Commands.Add(deleteCommand);
                }
            }

            #endregion

            #region remove dummy entries in fake collection

            List <FakePIMAttribute> toRemove = new List <FakePIMAttribute>();
            foreach (FakePIMAttribute fakeAttribute in fakeAttributes)
            {
                if (String.IsNullOrEmpty(fakeAttribute.Name))
                {
                    if (fakeAttribute.SourceAttribute != null)
                    {
                        removedAttributes.Add(fakeAttribute.SourceAttribute);
                        cmdDeletePIMAttribute deleteCommand = new cmdDeletePIMAttribute(controller);
                        deleteCommand.Set(fakeAttribute.SourceAttribute);
                        controller.CreatedMacro.Commands.Add(deleteCommand);
                    }
                    toRemove.Add(fakeAttribute);
                }
            }

            foreach (FakePIMAttribute attribute in toRemove)
            {
                fakeAttributes.Remove(attribute);
            }

            #endregion

            Dictionary <PIMAttribute, string> namesDict = new Dictionary <PIMAttribute, string>();
            foreach (PIMAttribute a in PIMClass.PIMAttributes)
            {
                if (!removedAttributes.Contains(a))
                {
                    namesDict.Add(a, a.Name);
                }
            }

            // check for changes and new attributes
            var modified = from FakePIMAttribute a in fakeAttributes
                           where a.SourceAttribute != null && !removedAttributes.Contains(a.SourceAttribute) && a.SomethingChanged()
                           select a;
            var added = from FakePIMAttribute a in fakeAttributes where a.SourceAttribute == null select a;

            // editing exisiting attribute
            foreach (FakePIMAttribute modifiedAttribute in modified)
            {
                PIMAttribute sourceAttribute = modifiedAttribute.SourceAttribute;
                uint         lower;
                UnlimitedInt upper;
                if (
                    !IHasCardinalityExt.ParseMultiplicityString(modifiedAttribute.Multiplicity, out lower,
                                                                out upper))
                {
                    error = true;
                }
                cmdUpdatePIMAttribute updateCommand = new cmdUpdatePIMAttribute(controller);
                updateCommand.Set(sourceAttribute, modifiedAttribute.Type, modifiedAttribute.Name, lower, upper, modifiedAttribute.DefaultValue);
                controller.CreatedMacro.Commands.Add(updateCommand);
                namesDict[sourceAttribute] = modifiedAttribute.Name;
            }

            List <string> names = namesDict.Values.ToList();
            // new attribute
            foreach (FakePIMAttribute addedAttribute in added)
            {
                if (!string.IsNullOrEmpty(addedAttribute.Name) && addedAttribute.Checked)
                {
                    uint         lower = 1;
                    UnlimitedInt upper = 1;
                    if (!String.IsNullOrEmpty(addedAttribute.Multiplicity))
                    {
                        if (!IHasCardinalityExt.ParseMultiplicityString(addedAttribute.Multiplicity, out lower, out upper))
                        {
                            error = true;
                        }
                    }
                    cmdCreateNewPIMAttribute createNewPIMAttribute = new cmdCreateNewPIMAttribute(controller);
                    createNewPIMAttribute.Set(PIMClass, addedAttribute.Type, addedAttribute.Name, lower, upper, addedAttribute.DefaultValue);
                    controller.CreatedMacro.Commands.Add(createNewPIMAttribute);
                    addedAttributes.Add(addedAttribute);
                    names.Add(addedAttribute.Name);
                }
            }

            if (error)
            {
                controller.CancelMacro();
            }
            else
            {
                CommandBase tmp = (CommandBase)controller.CreatedMacro;
                controller.CommitMacro();
                if (string.IsNullOrEmpty(tmp.ErrorDescription))
                {
                    foreach (FakePIMAttribute attribute in addedAttributes)
                    {
                        attribute.SourceAttribute = PIMClass.PIMAttributes.Where
                                                        (property => property.Name == attribute.Name).SingleOrDefault();
                    }
                    addedAttributes.RemoveAll(attribute => attribute.SourceAttribute == null);
                    bApply.IsEnabled = false;
                    dialogReady      = true;
                    error            = false;
                }
                else
                {
                    error = true;
                }
            }
            Initialize(controller, PIMClass);
            applyButtonPressed = false;
        }