/// <summary>See <see cref="ElementTypeDescriptor.ShouldCreatePropertyDescriptor"/>.</summary>
protected override bool ShouldCreatePropertyDescriptor(ModelElement requestor, DomainPropertyInfo domainProperty)
{
Guid propertyId = domainProperty.Id;
if (propertyId == Role.MultiplicityDomainPropertyId)
{
FactType factType = ModelElement.FactType;
Objectification objectification;
LinkedElementCollection <RoleBase> roles;
// Display for binary fact types
if (factType != null &&
!(factType is QueryBase) &&
(roles = factType.RoleCollection).Count == 2)
{
if (null != (objectification = factType.ImpliedByObjectification))
{
roles = objectification.NestedFactType.RoleCollection;
if (roles.Count != 2)
{
return(false);
}
}
return(!FactType.GetUnaryRoleIndex(roles).HasValue);
}
return(false);
}
else if (propertyId == Role.IsMandatoryDomainPropertyId ||
propertyId == Role.ValueRangeTextDomainPropertyId)
{
if (ModelElement.FactType is QueryBase)
{
return(false);
}
}
else if (propertyId == Role.MandatoryConstraintNameDomainPropertyId ||
propertyId == Role.MandatoryConstraintModalityDomainPropertyId)
{
return(ModelElement.SimpleMandatoryConstraint != null);
}
else if (propertyId == Role.ObjectificationOppositeRoleNameDomainPropertyId)
{
FactType fact = ModelElement.FactType;
return(fact != null && fact.Objectification != null);
}
return(base.ShouldCreatePropertyDescriptor(requestor, domainProperty));
}
