private <T> Optional<Class<? extends T>> tryGetCustomHandler(
final DataSchemaNode dataSchemaNode) {
for (final UnknownSchemaNode unknownSchemaNode : dataSchemaNode.getUnknownSchemaNodes()) {
if (isExtenstionForCustomHandler(unknownSchemaNode)) {
final String argumentHandlerClassName = unknownSchemaNode.getNodeParameter();
try {
final Class<?> argumentClass = Class.forName(argumentHandlerClassName);
// TODO add check before cast
return Optional.<Class<? extends T>>of((Class<? extends T>) argumentClass);
} catch (final ClassNotFoundException e) {
throw new IllegalArgumentException(
"Unknown custom reader class "
+ argumentHandlerClassName
+ " for: "
+ dataSchemaNode.getQName());
}
}
}
return Optional.absent();
}
private boolean isExtenstionForCustomHandler(final UnknownSchemaNode unknownSchemaNode) {
final QName qName = unknownSchemaNode.getExtensionDefinition().getQName();
return qName.equals(CommandConstants.ARG_HANDLER_EXT_QNAME);
}