Generalization Checks

PowerDesigner provides default model checks to verify the validity of generalizations.

Check	Description and Correction
Redundant generalizations	Only one generalization is allowed between two classes or two interfaces. Manual correction: Remove redundant generalizations Automatic correction: None
Class multiple inheritance	The following check applies only to Java and PowerBuilder. Multiple inheritance is accepted in UML but not in this language. Manual correction: Keep single inheritance Automatic correction: None
Extend final class	A final class cannot be extended. Manual correction: Remove the generalization link, or remove the final property in the parent class Automatic correction: None
Non-persistent specifying attribute	If a generalization has a specifying attribute, the attribute must be marked as persistent. Manual correction: Select the Persistent checkbox on the Detail tab of the specifying attribute property sheet. Automatic correction: None
Generic: Child type parameters	A child of a generic classifier must resolve all of the type parameters defined by its parent. Manual correction: Resolve the missing type parameters. Automatic correction: None.
Generic: Child cannot be bound	A bound classifier cannot be the child of any classifier other than its generic parent. Manual correction: Remove the additional links. Automatic correction: None.