### Question:
FlumeBuilder { static CommonTree parseHost(String s) throws RecognitionException { return (CommonTree) getDeployParser(s).host().getTree(); }  static void setSourceFactory(SourceFactory srcFact); static void setSinkFactory(SinkFactory snkFact); static CommonTree parseSink(String s); static CommonTree parseSource(String s); static Pair<EventSource, EventSink> buildNode(Context context, File f); @SuppressWarnings("unchecked") static Map<String, Pair<String, String>> parseConf(Context ctx,
      String s); @SuppressWarnings("unchecked") static Map<String, Pair<EventSource, EventSink>> build(
      Context context, String s); static EventSource buildSource(String s); static EventSink buildSink(Context context, String s); @Deprecated static EventSink buildSink(String s); static String toLine(String name, String src, String snk); static String buildArg(CommonTree t); static Set<String> getSinkNames(); static Set<String> getDecoratorNames(); static Set<String> getSourceNames();  }### Answer:
@Test public void testHostnamne() throws org.antlr.runtime.RecognitionException { CommonTree t = null; t = FlumeBuilder.parseHost("localhost"); System.out.println(t); t = FlumeBuilder.parseHost("localhost.localdomain.com"); System.out.println(t); t = FlumeBuilder.parseHost("1.2.3.4"); System.out.println(t); }