org.apache.flink.streaming.runtime.operators.windowing

Interface KeyMap.TraversalEvaluator<K,V>

Type Parameters:

K - The type of the key.

V - The type of the value.

Enclosing class:

KeyMap<K,V>

public static interface KeyMap.TraversalEvaluator<K,V>

A visitor for a traversal over the union of multiple hash maps. The visitor is called for each key in the union of the maps and all values associated with that key (one per map, but multiple across maps).

Method Summary

Modifier and Type	Method and Description
void	keyDone() Called when the traversal for the current key is complete.
void	nextValue(V value) Called for each value found for the current key.
void	startNewKey(K key) Called whenever the traversal starts with a new key.

Method Detail

startNewKey

void startNewKey(K key)
          throws Exception

Called whenever the traversal starts with a new key.

Parameters:

key - The key traversed.

Throws:

Exception - Method forwards all exceptions.

nextValue

void nextValue(V value)
        throws Exception

Called for each value found for the current key.

Parameters:

value - The next value.

Throws:

Exception - Method forwards all exceptions.

keyDone

void keyDone()
      throws Exception

Called when the traversal for the current key is complete.

Throws:

Exception - Method forwards all exceptions.