/**
* Returns the definition of the selected attribute / object class OID.
*
* @param schemaEntry The selected schema entry to search on.
* @param type The type of the research. ("objectClasses" or "attributeTypes")
* @param oid The OID of the element to search for.
* @return The byte string definition of the element.
*/
private static ByteString getSchemaElement(
final Entry schemaEntry, final String type, final String oid) {
final Attribute attribute = schemaEntry.getAttribute(type);
final MatchingRule mrule = CoreSchema.getObjectIdentifierFirstComponentMatchingRule();
Assertion assertion;
try {
assertion = mrule.getAssertion(ByteString.valueOfUtf8(oid));
for (final ByteString value : attribute) {
final ByteString nvalue = mrule.normalizeAttributeValue(value);
if (assertion.matches(nvalue).toBoolean()) {
return value;
}
}
} catch (DecodeException e) {
throw new IllegalStateException(e);
}
throw new IllegalStateException(ERR_UPGRADE_UNKNOWN_OC_ATT.get(type, oid).toString());
}