org.iq80.leveldb.iterator

Class SeekingIterators

java.lang.Object

org.iq80.leveldb.iterator.SeekingIterators

public final class SeekingIterators
extends Object

When ever possible a specific interface implementation is created for speed purpose. see DbIterator where the same approach is used.

Method Summary

Modifier and Type	Method and Description
static <T,K,V> SeekingIterator<K,V>	fromSortedList(List<T> list, Function<T,K> keyExtractor, Function<T,V> valueExtractor, Comparator<K> comparator) Seeking iterator based on provided sorted list.
static <T> InternalIterator	twoLevelInternalIterator(SeekingIterator<InternalKey,T> indexIterator, Function<T,SeekingIterator<InternalKey,Slice>> blockFunction, Closeable closeableResources)
static SliceIterator	twoLevelSliceIterator(SliceIterator indexIterator, Function<Slice,SeekingIterator<Slice,Slice>> blockFunction, Closeable closeableResources)

Methods inherited from class java.lang.Object

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

Method Detail

fromSortedList

public static <T,K,V> SeekingIterator<K,V> fromSortedList(List<T> list,
                                                          Function<T,K> keyExtractor,
                                                          Function<T,V> valueExtractor,
                                                          Comparator<K> comparator)

Seeking iterator based on provided sorted list. Unpredictable behavior will happen if list is not sorted according to comparator

twoLevelSliceIterator

public static SliceIterator twoLevelSliceIterator(SliceIterator indexIterator,
                                                  Function<Slice,SeekingIterator<Slice,Slice>> blockFunction,
                                                  Closeable closeableResources)

twoLevelInternalIterator

public static <T> InternalIterator twoLevelInternalIterator(SeekingIterator<InternalKey,T> indexIterator,
                                                            Function<T,SeekingIterator<InternalKey,Slice>> blockFunction,
                                                            Closeable closeableResources)