public override void ElementAdded(ElementAddedEventArgs e)
{
base.ElementAdded(e);
Generalization element = (Generalization)e.ModelElement;
Store store = element.Store;
Transaction current = store.TransactionManager.CurrentTransaction;
if (current.IsSerializing || ModelRoot.BatchUpdating)
{
return;
}
if (element.IsInCircularInheritance())
{
ErrorDisplay.Show(store, $"{element.Subclass.Name} -> {element.Superclass.Name}: That inheritance link would cause a circular reference.");
current.Rollback();
return;
}
List <string> superclassPropertyNames = element.Superclass.AllPropertyNames.ToList();
List <string> nameClashes = element.Subclass
.Attributes
.Where(a => superclassPropertyNames.Contains(a.Name))
.Select(a => a.Name)
.Union(element.Subclass
.LocalNavigationProperties()
.Where(p => p.PropertyName != null && superclassPropertyNames.Contains(p.PropertyName))
.Select(p => p.PropertyName))
.ToList();
// remove attributes in subclass that are present in superclass IF they are completely identical (except for ModelClass, of course)
for (int i = 0; i < nameClashes.Count; i++)
{
ModelAttribute subclassAttribute = element.Subclass.Attributes.First(a => a.Name == nameClashes[i]);
ModelAttribute superclassAttribute = element.Superclass.AllAttributes.First(a => a.Name == nameClashes[i]);
List <(string propertyName, object thisValue, object otherValue)> differences = superclassAttribute.GetDifferences(subclassAttribute);
// ignore these differences if found
differences.RemoveAll(x => x.propertyName == "ModelClass" ||
x.propertyName == "Summary" ||
x.propertyName == "Description");
if (!differences.Any())
{
element.Subclass.Attributes.Remove(element.Subclass.Attributes.Single(a => a.Name == nameClashes[i]));
nameClashes.RemoveAt(i--);
}
}
// if any remain with the same name, it's an error
if (nameClashes.Any())
{
string nameClashList = string.Join("\n ", nameClashes);
ErrorDisplay.Show(store, $"{element.Subclass.Name} -> {element.Superclass.Name}: That inheritance link would cause name clashes. Resolve the following before setting the inheritance:\n {nameClashList}");
current.Rollback();
}
}
/// <inheritdoc />
public override void ElementDeleting(ElementDeletingEventArgs e)
{
base.ElementDeleting(e);
Generalization element = (Generalization)e.ModelElement;
Store store = element.Store;
Transaction current = store.TransactionManager.CurrentTransaction;
if (current.IsSerializing)
{
return;
}
if (element.Superclass.IsDeleting)
{
return;
}
ModelClass superclass = element.Superclass;
ModelClass subclass = element.Subclass;
List <Association> associations = store.ElementDirectory.AllElements.OfType <Association>().Where(a => a.Source == superclass || a.Target == superclass).ToList();
if (!superclass.AllAttributes.Any() && !associations.Any())
{
return;
}
if (!subclass.IsDeleting && QuestionDisplay.Show($"Push {superclass.Name} attributes and associations down to {subclass.Name}?") == true)
{
superclass.PushDown(subclass);
}
}
public override string GetToolTipText(DiagramItem item)
{
Generalization generalization = item.Shape.ModelElement as Generalization;
return(generalization != null
? $"{generalization.Subclass.Name} inherits from {generalization.Superclass.Name}"
: string.Empty);
}
public override void ElementAdded(ElementAddedEventArgs e)
{
base.ElementAdded(e);
Generalization element = (Generalization)e.ModelElement;
Store store = element.Store;
Transaction current = store.TransactionManager.CurrentTransaction;
if (current.IsSerializing)
{
return;
}
if (element.IsInCircularInheritance())
{
ErrorDisplay.Show($"{element.Subclass.Name} -> {element.Superclass.Name}: That inheritance link would cause a circular reference.");
current.Rollback();
return;
}
List <string> superclassPropertyNames = element.Superclass
.AllAttributes
.Select(a => a.Name)
.Union(element.Superclass
.AllNavigationProperties()
.Where(x => x.PropertyName != null)
.Select(a => a.PropertyName))
.ToList();
List <string> nameClashes = element.Subclass
.Attributes
.Where(a => superclassPropertyNames.Contains(a.Name))
.Select(a => a.Name)
.Union(element.Subclass
.LocalNavigationProperties()
.Where(p => p.PropertyName != null && superclassPropertyNames.Contains(p.PropertyName))
.Select(p => p.PropertyName))
.ToList();
// since we created the Id property, we'll remove it. Any other clashes are up to the user to resolve.
if (nameClashes.Contains("Id") &&
element.Subclass.Attributes.FirstOrDefault(a => a.Name == "Id")?.IsIdentity == true &&
element.Superclass.AllAttributes.FirstOrDefault(a => a.Name == "Id")?.IsIdentity == true)
{
element.Subclass.Attributes.Remove(element.Subclass.Attributes.Single(a => a.Name == "Id"));
nameClashes.Remove("Id");
}
if (nameClashes.Any())
{
string nameClashList = string.Join("\n ", nameClashes);
ErrorDisplay.Show($"{element.Subclass.Name} -> {element.Superclass.Name}: That inheritance link would cause name clashes. Resolve the following before setting the inheritance:\n {nameClashList}");
current.Rollback();
}
}
public override void ElementPropertyChanged(ElementPropertyChangedEventArgs e)
{
base.ElementPropertyChanged(e);
Generalization element = (Generalization)e.ModelElement;
Store store = element.Store;
Transaction current = store.TransactionManager.CurrentTransaction;
if (current.IsSerializing)
{
return;
}
switch (e.DomainProperty.Name)
{
case "Superclass":
case "Subclass":
if (!element.IsInCircularInheritance())
{
current.Rollback();
MessageBox.Show("That inheritance link would cause a circular reference.");
return;
}
if (element.Superclass != null)
{
List <string> superclassPropertyNames = element.Superclass
.AllAttributes
.Select(a => a.Name)
.Union(element.Superclass
.AllNavigationProperties()
.Select(a => a.PropertyName))
.ToList();
List <string> nameClashes = element.Subclass
.Attributes
.Where(a => superclassPropertyNames.Contains(a.Name))
.Select(a => a.Name)
.Union(element.Subclass
.LocalNavigationProperties()
.Where(p => p.PropertyName != null && superclassPropertyNames.Contains(p.PropertyName))
.Select(p => p.PropertyName))
.ToList();
// the Add rule removes the subclass Id property if it's causing a name class, but we won't do that in the change rule
if (nameClashes.Any())
{
current.Rollback();
string nameClashList = string.Join(", ", nameClashes);
MessageBox.Show("That inheritance link would cause name clashes. Resolve the following before setting the inheritance: " + nameClashList);
}
}
break;
}
}
/// <inheritdoc />
public override void ElementDeleting(ElementDeletingEventArgs e)
{
base.ElementDeleting(e);
Generalization element = (Generalization)e.ModelElement;
Store store = element.Store;
Transaction current = store.TransactionManager.CurrentTransaction;
if (current.IsSerializing || ModelRoot.BatchUpdating)
{
return;
}
if (element.Superclass.IsDeleting)
{
return;
}
ModelClass subclass = element.Subclass;
ModelClass superclass = element.Superclass;
List <Association> associations = superclass.AllNavigationProperties()
.Select(n => n.AssociationObject)
.Distinct()
.ToList();
if (!superclass.AllAttributes.Any() && !associations.Any())
{
return;
}
if (!subclass.IsDeleting && BooleanQuestionDisplay.Show(store, $"Push {superclass.Name} attributes and associations down to {subclass.Name}?") == true)
{
superclass.PushDown(subclass);
}
}
public override void ElementPropertyChanged(ElementPropertyChangedEventArgs e)
{
base.ElementPropertyChanged(e);
Generalization element = (Generalization)e.ModelElement;
if (element.IsDeleted)
{
return;
}
Store store = element.Store;
Transaction current = store.TransactionManager.CurrentTransaction;
if (current.IsSerializing || ModelRoot.BatchUpdating)
{
return;
}
if (Equals(e.NewValue, e.OldValue))
{
return;
}
switch (e.DomainProperty.Name)
{
case "Superclass":
case "Subclass":
if (element.Subclass.IsPropertyBag && !element.Superclass.IsPropertyBag)
{
ErrorDisplay.Show(store, $"{element.Subclass.Name} -> {element.Superclass.Name}: Since {element.Subclass.Name} is a property bag, it can't inherit from {element.Superclass.Name}, which is not a property bag.");
current.Rollback();
return;
}
if (!element.IsInCircularInheritance())
{
ErrorDisplay.Show(store, $"{element.Subclass.Name} -> {element.Superclass.Name}: That inheritance link would cause a circular reference.");
current.Rollback();
return;
}
if (element.Superclass != null)
{
List <string> superclassPropertyNames = element.Superclass
.AllAttributes
.Select(a => a.Name)
.Union(element.Superclass
.AllNavigationProperties()
.Select(a => a.PropertyName))
.ToList();
List <string> nameClashes = element.Subclass
.Attributes
.Where(a => superclassPropertyNames.Contains(a.Name))
.Select(a => a.Name)
.Union(element.Subclass
.LocalNavigationProperties()
.Where(p => p.PropertyName != null && superclassPropertyNames.Contains(p.PropertyName))
.Select(p => p.PropertyName))
.ToList();
// the Add rule removes the subclass Id property if it's causing a name class, but we won't do that in the change rule
if (nameClashes.Any())
{
string nameClashList = string.Join("\n ", nameClashes);
ErrorDisplay.Show(store, $"{element.Subclass.Name} -> {element.Superclass.Name}: That inheritance link would cause name clashes. Resolve the following before setting the inheritance:\n " + nameClashList);
current.Rollback();
}
}
break;
}
}
