Package org.apache.kafka.streams.state.internals

Class DelegatingPeekingKeyValueIterator<K,V>

java.lang.Object

org.apache.kafka.streams.state.internals.DelegatingPeekingKeyValueIterator<K,V>

All Implemented Interfaces:

java.io.Closeable, java.lang.AutoCloseable, java.util.Iterator<KeyValue<K,V>>, PeekingKeyValueIterator<K,V>, KeyValueIterator<K,V>

public class DelegatingPeekingKeyValueIterator<K,V>
extends java.lang.Object
implements KeyValueIterator<K,V>, PeekingKeyValueIterator<K,V>

Optimized KeyValueIterator used when the same element could be peeked multiple times.

Constructor Summary

Constructors

Constructor	Description
DelegatingPeekingKeyValueIterator(java.lang.String storeName, KeyValueIterator<K,V> underlying)

Method Summary

Modifier and Type	Method	Description
void	close()
boolean	hasNext()
KeyValue<K,V>	next()
KeyValue<K,V>	peekNext()
K	peekNextKey()	Peek at the next key without advancing the iterator

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface java.util.Iterator

forEachRemaining, remove

Constructor Detail

DelegatingPeekingKeyValueIterator

public DelegatingPeekingKeyValueIterator(java.lang.String storeName,
                                         KeyValueIterator<K,V> underlying)

Method Detail

peekNextKey

public K peekNextKey()

Description copied from interface: KeyValueIterator

Peek at the next key without advancing the iterator

Specified by:

peekNextKey in interface KeyValueIterator<K,V>

Returns:

the key of the next value that would be returned from the next call to next

close

public void close()

Specified by:

close in interface java.lang.AutoCloseable

Specified by:

close in interface java.io.Closeable

Specified by:

close in interface KeyValueIterator<K,V>

hasNext

public boolean hasNext()

Specified by:

hasNext in interface java.util.Iterator<K>

next

public KeyValue<K,V> next()

Specified by:

next in interface java.util.Iterator<K>

peekNext

public KeyValue<K,V> peekNext()

Specified by:

peekNext in interface PeekingKeyValueIterator<K,V>