private RelationContener DrawInheritanceRelation(EntityTypeDesigner baseTypeDesigner, EntityTypeDesigner childTypeDesigner)
{
var relationContener = (from rc in Designer.Children.OfType <RelationContener>()
let ir = rc.Content as InheritanceRelation
where ir != null && ir.FromTypeDesigner == childTypeDesigner && ir.ToTypeDesigner == baseTypeDesigner
select rc).FirstOrDefault();
if (relationContener != null)
{
return(relationContener);
}
var inheritanceRelation = new InheritanceRelation(Designer, childTypeDesigner, baseTypeDesigner, () => Designer.Children.OfType <EntityTypeDesigner>().FirstOrDefault(etd => etd.EntityType.BusinessInstance == EntityType.BusinessInstance.BaseType));
relationContener = new RelationContener(inheritanceRelation);
Designer.Children.Add(relationContener);
relationContener.SetBinding(Canvas.LeftProperty, new Binding {
Source = inheritanceRelation, Path = new PropertyPath("CanvasLeft")
});
relationContener.SetBinding(Canvas.TopProperty, new Binding {
Source = inheritanceRelation, Path = new PropertyPath("CanvasTop")
});
baseTypeDesigner.AddRelationContenerWithoutRelatedProperty(relationContener);
childTypeDesigner.AddRelationContenerWithoutRelatedProperty(relationContener);
return(relationContener);
}
private void ValidateSingleInheritance(ValidationContext context)
{
LinkedElementCollection <ModelClass> parentClasses = InheritanceRelation.GetTargetModelClasses(this);
if (parentClasses.Count > 1)
{
context.LogError(
string.Format(
"Class {0} cannot inherit from multiple classes.",
Name), "AW001SingleInheritanceError", this);
}
}
