emits mergedtuple on mergedport if it is not empty concode_field_sep DefaultOutputPort<Map<K,V>> mergedport concode_elem_sep Map<K,V> mergedTuple concode_field_sep void beginWindow concode_elem_sep void process concode_elem_sep void setup concode_elem_sep void teardown
void function ( ) { if ( ! mergedTuple . isEmpty ( ) ) { mergedport . emit ( mergedTuple ) ; mergedTuple = new HashMap < K , V > ( ) ; } }