Module swim.collections

Package swim.collections

Class BTreeMap<K,V,U>

java.lang.Object

swim.collections.BTreeContext<K,V>

swim.collections.BTreeMap<K,V,U>

All Implemented Interfaces:

Cloneable, Iterable<Map.Entry<K,V>>, Map<K,V>, SortedMap<K,V>, Debug, IterableMap<K,V>, OrderedMap<K,V>, ReducedMap<K,V,U>

public class BTreeMap<K,V,U>
extends BTreeContext<K,V>
implements ReducedMap<K,V,U>, Cloneable, Debug

Mutable, thread-safe Map backed by a B-tree.

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.Map

Map.Entry<K extends Object,V extends Object>

Constructor Summary

Constructors

Modifier	Constructor	Description
	BTreeMap()
protected	BTreeMap(BTreePage<K,V,U> root)

Method Summary

Modifier and Type	Method	Description
void	clear()
BTreeMap<K,V,U>	cleared()
BTreeMap<K,V,U>	clone()
Comparator<? super K>	comparator()
boolean	containsKey(Object key)
boolean	containsValue(Object value)
protected BTreeMap<K,V,U>	copy(BTreePage<K,V,U> root)
<T> Output<T>	debug(Output<T> output)	Writes a developer readable, debug-formatted string representation of this object to output.
BTreeMap<K,V,U>	drop(int lower)
static <K, V, U> BTreeMap<K,V,U>	empty()
boolean	equals(Object other)
Map.Entry<K,V>	firstEntry()
K	firstKey()
V	firstValue()
static <K, V, U> BTreeMap<K,V,U>	from(Map<? extends K,? extends V> map)
V	get(Object key)
Map.Entry<K,V>	getEntry(Object key)
Map.Entry<K,V>	getIndex(int index)
int	hashCode()
int	indexOf(Object key)
boolean	isEmpty()
OrderedMapCursor<K,V>	iterator()
Cursor<K>	keyIterator()
Map.Entry<K,V>	lastEntry()
K	lastKey()
V	lastValue()
Map.Entry<K,V>	nextEntry(K key)
K	nextKey(K key)
V	nextValue(K key)
Map.Entry<K,V>	previousEntry(K key)
K	previousKey(K key)
V	previousValue(K key)
V	put(K key, V newValue)
void	putAll(Map<? extends K,? extends V> map)
U	reduced(U identity, CombinerFunction<? super V,U> accumulator, CombinerFunction<U,U> combiner)	Returns the reduction of this ReducedMap, combining all contained elements with the given accumulator and combiner functions, recomputing only what has changed since the last invocation of reduced.
V	remove(Object key)
BTreeMap<K,V,U>	removed(K key)
OrderedMapCursor<K,V>	reverseIterator()
Cursor<K>	reverseKeyIterator()
Cursor<V>	reverseValueIterator()
int	size()
BTree<K,V>	snapshot()	An immutable copy of this BTreeMap's data.
BTreeMap<K,V,U>	take(int upper)
String	toString()
BTreeMap<K,V,U>	updated(K key, V newValue)
Cursor<V>	valueIterator()

Methods inherited from class swim.collections.BTreeContext

compareKey, pageShouldMerge, pageShouldSplit, pageSplitSize

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface java.lang.Iterable

forEach, spliterator

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, forEach, getOrDefault, merge, putIfAbsent, remove, replace, replace, replaceAll

Methods inherited from interface swim.util.OrderedMap

entrySet, headMap, keySet, subMap, tailMap, values

Constructor Details

BTreeMap

protected BTreeMap(BTreePage<K,V,U> root)

BTreeMap

public BTreeMap()

Method Details

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface IterableMap<K,V>

Specified by:

isEmpty in interface Map<K,V>

Specified by:

isEmpty in interface OrderedMap<K,V>

size

public int size()

Specified by:

size in interface IterableMap<K,V>

Specified by:

size in interface Map<K,V>

Specified by:

size in interface OrderedMap<K,V>

containsKey

public boolean containsKey(Object key)

Specified by:

containsKey in interface IterableMap<K,V>

Specified by:

containsKey in interface Map<K,V>

Specified by:

containsKey in interface OrderedMap<K,V>

containsValue

public boolean containsValue(Object value)

Specified by:

containsValue in interface IterableMap<K,V>

Specified by:

containsValue in interface Map<K,V>

Specified by:

containsValue in interface OrderedMap<K,V>

indexOf

public int indexOf(Object key)

Specified by:

indexOf in interface OrderedMap<K,V>

get

public V get(Object key)

Specified by:

get in interface IterableMap<K,V>

Specified by:

get in interface Map<K,V>

Specified by:

get in interface OrderedMap<K,V>

getEntry

public Map.Entry<K,V> getEntry(Object key)

Specified by:

getEntry in interface OrderedMap<K,V>

getIndex

public Map.Entry<K,V> getIndex(int index)

Specified by:

getIndex in interface OrderedMap<K,V>

firstEntry

public Map.Entry<K,V> firstEntry()

Specified by:

firstEntry in interface OrderedMap<K,V>

firstKey

public K firstKey()

Specified by:

firstKey in interface OrderedMap<K,V>

Specified by:

firstKey in interface SortedMap<K,V>

firstValue

public V firstValue()

Specified by:

firstValue in interface OrderedMap<K,V>

lastEntry

public Map.Entry<K,V> lastEntry()

Specified by:

lastEntry in interface OrderedMap<K,V>

lastKey

public K lastKey()

Specified by:

lastKey in interface OrderedMap<K,V>

Specified by:

lastKey in interface SortedMap<K,V>

lastValue

public V lastValue()

Specified by:

lastValue in interface OrderedMap<K,V>

nextEntry

public Map.Entry<K,V> nextEntry(K key)

Specified by:

nextEntry in interface OrderedMap<K,V>

nextKey

public K nextKey(K key)

Specified by:

nextKey in interface OrderedMap<K,V>

nextValue

public V nextValue(K key)

Specified by:

nextValue in interface OrderedMap<K,V>

previousEntry

public Map.Entry<K,V> previousEntry(K key)

Specified by:

previousEntry in interface OrderedMap<K,V>

previousKey

public K previousKey(K key)

Specified by:

previousKey in interface OrderedMap<K,V>

previousValue

public V previousValue(K key)

Specified by:

previousValue in interface OrderedMap<K,V>

put

public V put(K key,
 V newValue)

Specified by:

put in interface IterableMap<K,V>

Specified by:

put in interface Map<K,V>

Specified by:

put in interface OrderedMap<K,V>

putAll

public void putAll(Map<? extends K,? extends V> map)

Specified by:

putAll in interface IterableMap<K,V>

Specified by:

putAll in interface Map<K,V>

Specified by:

putAll in interface OrderedMap<K,V>

remove

public V remove(Object key)

Specified by:

remove in interface IterableMap<K,V>

Specified by:

remove in interface Map<K,V>

Specified by:

remove in interface OrderedMap<K,V>

drop

public BTreeMap<K,V,U> drop(int lower)

take

public BTreeMap<K,V,U> take(int upper)

clear

public void clear()

Specified by:

clear in interface IterableMap<K,V>

Specified by:

clear in interface Map<K,V>

Specified by:

clear in interface OrderedMap<K,V>

updated

public BTreeMap<K,V,U> updated(K key,
 V newValue)

removed

public BTreeMap<K,V,U> removed(K key)

cleared

public BTreeMap<K,V,U> cleared()

reduced

public U reduced(U identity,
 CombinerFunction<? super V,U> accumulator,
 CombinerFunction<U,U> combiner)

Description copied from interface: ReducedMap

Returns the reduction of this ReducedMap, combining all contained elements with the given accumulator and combiner functions, recomputing only what has changed since the last invocation of reduced. Stores partial computations to accelerate repeated reduction of continuously mutating datasets.

Specified by:

reduced in interface ReducedMap<K,V,U>

snapshot

public BTree<K,V> snapshot()

An immutable copy of this BTreeMap's data.

iterator

public OrderedMapCursor<K,V> iterator()

Specified by:

iterator in interface Iterable<K>

Specified by:

iterator in interface IterableMap<K,V>

Specified by:

iterator in interface OrderedMap<K,V>

keyIterator

public Cursor<K> keyIterator()

Specified by:

keyIterator in interface IterableMap<K,V>

Specified by:

keyIterator in interface OrderedMap<K,V>

valueIterator

public Cursor<V> valueIterator()

Specified by:

valueIterator in interface IterableMap<K,V>

Specified by:

valueIterator in interface OrderedMap<K,V>

reverseIterator

public OrderedMapCursor<K,V> reverseIterator()

reverseKeyIterator

public Cursor<K> reverseKeyIterator()

reverseValueIterator

public Cursor<V> reverseValueIterator()

clone

public BTreeMap<K,V,U> clone()

Overrides:

clone in class Object

copy

protected BTreeMap<K,V,U> copy(BTreePage<K,V,U> root)

comparator

public Comparator<? super K> comparator()

Specified by:

comparator in interface OrderedMap<K,V>

Specified by:

comparator in interface SortedMap<K,V>

equals

public boolean equals(Object other)

Specified by:

equals in interface Map<K,V>

Overrides:

equals in class Object

hashCode

public int hashCode()

Specified by:

hashCode in interface Map<K,V>

Overrides:

hashCode in class Object

debug

public <T> Output<T> debug(Output<T> output)

Description copied from interface: Debug

Writes a developer readable, debug-formatted string representation of this object to output.

Specified by:

debug in interface Debug

Returns:

the continuation of the output.

toString

public String toString()

Overrides:

toString in class Object

empty

public static <K,
V,
U> BTreeMap<K,V,U> empty()

from

public static <K,
V,
U> BTreeMap<K,V,U> from(Map<? extends K,? extends V> map)