/**
* Returns the creation date of the entry identified by the given alias.
*
* @param alias the alias name
* @return the creation date of this entry, or null if the given alias does not exist
*/
public Date engineGetCreationDate(String alias) {
AbstractMap.SimpleEntry<String, Collection<KeyStore>> pair = getKeystoresForReading(alias);
Date date = null;
try {
String entryAlias = pair.getKey();
for (KeyStore keystore : pair.getValue()) {
date = keystore.getCreationDate(entryAlias);
if (date != null) {
break;
}
}
} catch (KeyStoreException e) {
throw new IllegalStateException(e);
}
return date;
}
