function getAssocType($pubObject)
{
$assocType = null;
if (is_a($pubObject, 'Submission')) {
$assocType = ASSOC_TYPE_SUBMISSION;
} elseif (is_a($pubObject, 'Representation')) {
$assocType = ASSOC_TYPE_REPRESENTATION;
} elseif (is_a($pubObject, 'SubmissionFile')) {
$assocType = ASSOC_TYPE_SUBMISSION_FILE;
}
return $assocType;
}