# Package org.eclipse.rdf4j.federated.exception

- Class Summary
  Class | Description
  --- | ---
  ExceptionUtil | Convenience functions to handle exceptions.

- Exception Summary
  Exception | Description
  --- | ---
  EntryAlreadyExistsException |
  EntryUpdateException |
  FedXException | Base class for any FedX Exception.
  FedXQueryException | Exception to be thrown if during query evaluation a data source is not reachable, i.e.
  FedXRuntimeException | Base class for any FedX Exception.
  FilterConversionException | Thrown if a filter could not be converted.
  IllegalQueryException | Thrown if something is wrong while constructing the query string.
  OptimizationException |