ud-filter-java.md
The UDFilter API provides the following methods for extension by subclasses:
public void setup(ServerInterface srvInterface) throws UdfException;
public abstract StreamState process(ServerInterface srvInterface, DataBuffer input,
InputState input_state, DataBuffer output)
throws UdfException;
protected void cancel(ServerInterface srvInterface);
public void destroy(ServerInterface srvInterface) throws UdfException;