public override bool CanExecute()
{
if (!(PSMComponentGuid != Guid.Empty &&
PIMComponentGuid == Guid.Empty || (Project.VerifyComponentType <PSMClass>(PSMComponentGuid) && Project.VerifyComponentType <PIMClass>(PIMComponentGuid))
))
{
ErrorDescription = CommandErrors.CMDERR_INPUT_TYPE_MISMATCH;
return(false);
}
//PSMClass does not have representants when interpretation is to be changed
PSMClass c = Project.TranslateComponent <PSMClass>(PSMComponentGuid);
if (c.Representants.Count > 0)
{
ErrorDescription = CommandErrors.CMDERR_CLASS_IS_REPRESENTED;
return(false);
}
//PSM attributes within the uninterpreted PSM Class subtree cannot have interpretations
if (!c.UnInterpretedSubClasses()
.SelectMany <PSMClass, PSMAttribute>(cl => cl.PSMAttributes)
.Union <PSMAttribute>(c.PSMAttributes)
.All <PSMAttribute>(a => a.Interpretation == null)
)
{
ErrorDescription = CommandErrors.CMDERR_UNINTERPRETED_SUBCLASS_ATTRIBUTES_INTERPRETED;
return(false);
}
//PSM associations within the uninterpreted PSM Class subtree cannot have interpretations
if (!(c.UnInterpretedSubClasses()
.Select <PSMClass, PSMAssociation>(cl => cl.ParentAssociation)
.All <PSMAssociation>(a => a.Interpretation == null) &&
(c.ParentAssociation == null || c.ParentAssociation.Interpretation == null)))
{
ErrorDescription = CommandErrors.CMDERR_UNINTERPRETED_SUBCLASS_ASSOCIATIONS_INTERPRETED;
return(false);
}
return(true);
}