public static bool CanAcceptSourceAndTarget(DslModeling::ModelElement candidateSource, DslModeling::ModelElement candidateTarget)
{
// Accepts null, null; source, null; source, target but NOT null, target
if (candidateSource == null)
{
if (candidateTarget != null)
{
throw new global::System.ArgumentNullException("candidateSource");
}
else // Both null
{
return(false);
}
}
bool acceptSource = CanAcceptSource(candidateSource);
// If the source wasn't accepted then there's no point checking targets.
// If there is no target then the source controls the accept.
if (!acceptSource || candidateTarget == null)
{
return(acceptSource);
}
else // Check combinations
{
if (candidateSource is global::UPM_IPS.DRQPJPFMAMPracticaDSLTools.Relacion)
{
if (candidateTarget is global::UPM_IPS.DRQPJPFMAMPracticaDSLTools.AtributoRelacion)
{
global::UPM_IPS.DRQPJPFMAMPracticaDSLTools.Relacion sourceRelacion = (global::UPM_IPS.DRQPJPFMAMPracticaDSLTools.Relacion)candidateSource;
global::UPM_IPS.DRQPJPFMAMPracticaDSLTools.AtributoRelacion targetAtributoRelacion = (global::UPM_IPS.DRQPJPFMAMPracticaDSLTools.AtributoRelacion)candidateTarget;
if (targetAtributoRelacion == null || global::UPM_IPS.DRQPJPFMAMPracticaDSLTools.RelacionReferencesAtributoRelacion.GetLinkToRelacion(targetAtributoRelacion) != null)
{
return(false);
}
if (targetAtributoRelacion == null || sourceRelacion == null || global::UPM_IPS.DRQPJPFMAMPracticaDSLTools.RelacionReferencesAtributoRelacion.GetLinks(sourceRelacion, targetAtributoRelacion).Count > 0)
{
return(false);
}
return(true);
}
}
}
return(false);
}
