/**
* @param po Portable object.
* @return Affinity key.
*/
public Object affinityKey(BinaryObject po) {
try {
BinaryType meta = po.type();
if (meta != null) {
String affKeyFieldName = meta.affinityKeyFieldName();
if (affKeyFieldName != null) return po.field(affKeyFieldName);
} else if (po instanceof BinaryObjectEx) {
int id = ((BinaryObjectEx) po).typeId();
String affKeyFieldName = portableCtx.affinityKeyFieldName(id);
if (affKeyFieldName != null) return po.field(affKeyFieldName);
}
} catch (BinaryObjectException e) {
U.error(log, "Failed to get affinity field from portable object: " + po, e);
}
return po;
}
