(catalog, entityMeta, keyCls.getName(), secKeyMeta);
/* Convert entity to bytes. */
PersistEntityBinding entityBinding =
new PersistEntityBinding(catalog, entityCls.getName(), false);
entityBinding.objectToData(entity, dataEntry);
entityBinding.objectToKey(entity, keyEntry);
/* Convert secondary key to bytes. */
PersistKeyBinding keyBinding =
new PersistKeyBinding(catalog, keyCls.getName(), false);