edu.emory.mathcs.backport.java.util.concurrent
Interface ConcurrentNavigableMap

All Superinterfaces:

ConcurrentMap, java.util.Map, NavigableMap, java.util.SortedMap

All Known Implementing Classes:

ConcurrentSkipListMap

public interface ConcurrentNavigableMap

extends ConcurrentMap, NavigableMap

A ConcurrentMap supporting NavigableMap operations, and recursively so for its navigable sub-maps.

This interface is a member of the Java Collections Framework.

Since:

1.6

Author:

Doug Lea

Nested Class Summary

Nested classes inherited from class java.util.Map

java.util.Map.Entry

Method Summary

NavigableSet	descendingKeySet() Returns a reverse order NavigableSet view of the keys contained in this map.
NavigableMap	descendingMap() Returns a reverse order view of the mappings contained in this map.
java.util.SortedMap	headMap(java.lang.Object toKey) Equivalent to .
NavigableMap	headMap(java.lang.Object toKey, boolean inclusive) Returns a view of the portion of this map whose keys are less than (or equal to, if is true) .
java.util.Set	keySet() Returns a NavigableSet view of the keys contained in this map.
NavigableSet	navigableKeySet() Returns a NavigableSet view of the keys contained in this map.
NavigableMap	subMap(java.lang.Object fromKey, boolean fromInclusive, java.lang.Object toKey, boolean toInclusive) Returns a view of the portion of this map whose keys range from to .
java.util.SortedMap	subMap(java.lang.Object fromKey, java.lang.Object toKey) Equivalent to .
java.util.SortedMap	tailMap(java.lang.Object fromKey) Equivalent to .
NavigableMap	tailMap(java.lang.Object fromKey, boolean inclusive) Returns a view of the portion of this map whose keys are greater than (or equal to, if is true) .

Methods inherited from interface edu.emory.mathcs.backport.java.util.concurrent.ConcurrentMap

putIfAbsent, remove, replace, replace

Methods inherited from interface java.util.Map

clear, containsKey, containsValue, entrySet, equals, get, hashCode, isEmpty, put, putAll, remove, size, values

Methods inherited from interface edu.emory.mathcs.backport.java.util.NavigableMap

ceilingEntry, ceilingKey, firstEntry, floorEntry, floorKey, higherEntry, higherKey, lastEntry, lowerEntry, lowerKey, pollFirstEntry, pollLastEntry

Methods inherited from interface java.util.SortedMap

comparator, firstKey, lastKey

Method Detail

subMap

public NavigableMap subMap(java.lang.Object fromKey,
                           boolean fromInclusive,
                           java.lang.Object toKey,
                           boolean toInclusive)

Description copied from interface: NavigableMap

Returns a view of the portion of this map whose keys range from to . If and are equal, the returned map is empty unless and are both true. The returned map is backed by this map, so changes in the returned map are reflected in this map, and vice-versa. The returned map supports all optional map operations that this map supports.

The returned map will throw an on an attempt to insert a key outside of its range, or to construct a submap either of whose endpoints lie outside its range.

Specified by:

subMap in interface NavigableMap

Parameters:

fromKey - low endpoint of the keys in the returned map

fromInclusive - if the low endpoint is to be included in the returned view

toKey - high endpoint of the keys in the returned map

toInclusive - if the high endpoint is to be included in the returned view

Returns:

a view of the portion of this map whose keys range from to

Throws:

java.lang.ClassCastException - if and cannot be compared to one another using this map's comparator (or, if the map has no comparator, using natural ordering). Implementations may, but are not required to, throw this exception if or cannot be compared to keys currently in the map.

java.lang.NullPointerException - if or is null and this map does not permit null keys

java.lang.IllegalArgumentException - if is greater than ; or if this map itself has a restricted range, and or lies outside the bounds of the range

headMap

public NavigableMap headMap(java.lang.Object toKey,
                            boolean inclusive)

Description copied from interface: NavigableMap

Returns a view of the portion of this map whose keys are less than (or equal to, if is true) . The returned map is backed by this map, so changes in the returned map are reflected in this map, and vice-versa. The returned map supports all optional map operations that this map supports.

The returned map will throw an on an attempt to insert a key outside its range.

Specified by:

headMap in interface NavigableMap

Parameters:

toKey - high endpoint of the keys in the returned map

inclusive - if the high endpoint is to be included in the returned view

Returns:

a view of the portion of this map whose keys are less than (or equal to, if is true)

Throws:

java.lang.ClassCastException - if is not compatible with this map's comparator (or, if the map has no comparator, if does not implement Comparable). Implementations may, but are not required to, throw this exception if cannot be compared to keys currently in the map.

java.lang.NullPointerException - if is null and this map does not permit null keys

java.lang.IllegalArgumentException - if this map itself has a restricted range, and lies outside the bounds of the range

tailMap

public NavigableMap tailMap(java.lang.Object fromKey,
                            boolean inclusive)

Description copied from interface: NavigableMap

Returns a view of the portion of this map whose keys are greater than (or equal to, if is true) . The returned map is backed by this map, so changes in the returned map are reflected in this map, and vice-versa. The returned map supports all optional map operations that this map supports.

The returned map will throw an on an attempt to insert a key outside its range.

Specified by:

tailMap in interface NavigableMap

Parameters:

fromKey - low endpoint of the keys in the returned map

inclusive - if the low endpoint is to be included in the returned view

Returns:

a view of the portion of this map whose keys are greater than (or equal to, if is true)

Throws:

java.lang.ClassCastException - if is not compatible with this map's comparator (or, if the map has no comparator, if does not implement Comparable). Implementations may, but are not required to, throw this exception if cannot be compared to keys currently in the map.

java.lang.NullPointerException - if is null and this map does not permit null keys

java.lang.IllegalArgumentException - if this map itself has a restricted range, and lies outside the bounds of the range

subMap

public java.util.SortedMap subMap(java.lang.Object fromKey,
                                  java.lang.Object toKey)

Description copied from interface: NavigableMap

Equivalent to .

Specified by:

subMap in interface NavigableMap

Throws:

java.lang.ClassCastException

java.lang.NullPointerException

java.lang.IllegalArgumentException

headMap

public java.util.SortedMap headMap(java.lang.Object toKey)

Description copied from interface: NavigableMap

Equivalent to .

Specified by:

headMap in interface NavigableMap

Throws:

java.lang.ClassCastException

java.lang.NullPointerException

java.lang.IllegalArgumentException

tailMap

public java.util.SortedMap tailMap(java.lang.Object fromKey)

Description copied from interface: NavigableMap

Equivalent to .

Specified by:

tailMap in interface NavigableMap

Throws:

java.lang.ClassCastException

java.lang.NullPointerException

java.lang.IllegalArgumentException

descendingMap

public NavigableMap descendingMap()

Returns a reverse order view of the mappings contained in this map. The descending map is backed by this map, so changes to the map are reflected in the descending map, and vice-versa.

The returned map has an ordering equivalent to Collections.reverseOrder(comparator()). The expression returns a view of essentially equivalent to .

Specified by:

descendingMap in interface NavigableMap

Returns:

a reverse order view of this map

navigableKeySet

public NavigableSet navigableKeySet()

Returns a NavigableSet view of the keys contained in this map. The set's iterator returns the keys in ascending order. The set is backed by the map, so changes to the map are reflected in the set, and vice-versa. The set supports element removal, which removes the corresponding mapping from the map, via the , , , , and operations. It does not support the or operations.

The view's is a "weakly consistent" iterator that will never throw ConcurrentModificationException, and guarantees to traverse elements as they existed upon construction of the iterator, and may (but is not guaranteed to) reflect any modifications subsequent to construction.

Specified by:

navigableKeySet in interface NavigableMap

Returns:

a navigable set view of the keys in this map

keySet

public java.util.Set keySet()

Returns a NavigableSet view of the keys contained in this map. The set's iterator returns the keys in ascending order. The set is backed by the map, so changes to the map are reflected in the set, and vice-versa. The set supports element removal, which removes the corresponding mapping from the map, via the , , , , and operations. It does not support the or operations.

The view's is a "weakly consistent" iterator that will never throw ConcurrentModificationException, and guarantees to traverse elements as they existed upon construction of the iterator, and may (but is not guaranteed to) reflect any modifications subsequent to construction.

This method is equivalent to method .

Specified by:

keySet in interface java.util.Map

Returns:

a navigable set view of the keys in this map

descendingKeySet

public NavigableSet descendingKeySet()

Returns a reverse order NavigableSet view of the keys contained in this map. The set's iterator returns the keys in descending order. The set is backed by the map, so changes to the map are reflected in the set, and vice-versa. The set supports element removal, which removes the corresponding mapping from the map, via the , , , , and operations. It does not support the or operations.

The view's is a "weakly consistent" iterator that will never throw ConcurrentModificationException, and guarantees to traverse elements as they existed upon construction of the iterator, and may (but is not guaranteed to) reflect any modifications subsequent to construction.

Specified by:

descendingKeySet in interface NavigableMap

Returns:

a reverse order navigable set view of the keys in this map