public override bool CanExecute()
{
if (!(schemaGuid != Guid.Empty &&
Project.VerifyComponentType <PSMSchema>(schemaGuid) &&
associationGuid != Guid.Empty &&
Project.VerifyComponentType <PSMAssociation>(associationGuid)))
{
ErrorDescription = CommandErrors.CMDERR_INPUT_TYPE_MISMATCH;
return(false);
}
PSMAssociation a = Project.TranslateComponent <PSMAssociation>(associationGuid);
if (a.Interpretation != null)
{
return(true);
}
if (a.Child != null && a.Child is PSMClass && (a.Child as PSMClass).Interpretation != null)
{
return(true);
}
PSMAssociationMember c = a.Child; //Uninterpreted child
IEnumerable <PSMClass> unInterpretedSubClasses = c.UnInterpretedSubClasses(true);
//PSM attributes within the uninterpreted PSM Class subtree cannot have interpretations
if (!unInterpretedSubClasses
.SelectMany <PSMClass, PSMAttribute>(cl => cl.PSMAttributes)
.All <PSMAttribute>(at => at.Interpretation == null)
)
{
ErrorDescription = CommandErrors.CMDERR_UNINTERPRETED_SUBCLASS_ATTRIBUTES_INTERPRETED;
return(false);
}
//PSM associations within the uninterpreted PSM Class subtree cannot have interpretations
if (!unInterpretedSubClasses
.Select <PSMClass, PSMAssociation>(cl => cl.ParentAssociation)
.All <PSMAssociation>(assoc => assoc.Interpretation == null)
)
{
ErrorDescription = CommandErrors.CMDERR_UNINTERPRETED_SUBCLASS_ASSOCIATIONS_INTERPRETED;
return(false);
}
return(true);
}
