it.unimi.dsi.fastutil.longs
Class Long2LongRBTreeMap

java.lang.Object
  extended by it.unimi.dsi.fastutil.longs.AbstractLong2LongFunction
      extended by it.unimi.dsi.fastutil.longs.AbstractLong2LongMap
          extended by it.unimi.dsi.fastutil.longs.AbstractLong2LongSortedMap
              extended by it.unimi.dsi.fastutil.longs.Long2LongRBTreeMap
All Implemented Interfaces:
Function<Long,Long>, Long2LongFunction, Long2LongMap, Long2LongSortedMap, Serializable, Cloneable, Map<Long,Long>, SortedMap<Long,Long>

public class Long2LongRBTreeMap
extends AbstractLong2LongSortedMap
implements Serializable, Cloneable

A type-specific red-black tree map with a fast, small-footprint implementation.

The iterators provided by the views of this class are type-specific bidirectional iterators. Moreover, the iterator returned by iterator() can be safely cast to a type-specific list iterator.

See Also:
Serialized Form

Nested Class Summary
 
Nested classes/interfaces inherited from class it.unimi.dsi.fastutil.longs.AbstractLong2LongSortedMap
AbstractLong2LongSortedMap.KeySetIterator, AbstractLong2LongSortedMap.ValuesCollection, AbstractLong2LongSortedMap.ValuesIterator
 
Nested classes/interfaces inherited from class it.unimi.dsi.fastutil.longs.AbstractLong2LongMap
AbstractLong2LongMap.BasicEntry
 
Nested classes/interfaces inherited from interface it.unimi.dsi.fastutil.longs.Long2LongSortedMap
Long2LongSortedMap.FastSortedEntrySet
 
Nested classes/interfaces inherited from interface it.unimi.dsi.fastutil.longs.Long2LongMap
Long2LongMap.FastEntrySet
 
Field Summary
protected  LongComparator actualComparator
          This map's actual comparator; it may differ from storedComparator because it is always a type-specific comparator, so it could be derived from the former by wrapping.
protected  int count
          Number of entries in this map.
protected  ObjectSortedSet<Long2LongMap.Entry> entries
          Cached set of entries.
protected  it.unimi.dsi.fastutil.longs.Long2LongRBTreeMap.Entry firstEntry
          The first key in this map.
protected  LongSortedSet keys
          Cached set of keys.
protected  it.unimi.dsi.fastutil.longs.Long2LongRBTreeMap.Entry lastEntry
          The last key in this map.
protected  boolean modified
          The value of this variable remembers, after a put() or a remove(), whether the domain of the map has been modified.
static long serialVersionUID
           
protected  Comparator<? super Long> storedComparator
          This map's comparator, as provided in the constructor.
protected  it.unimi.dsi.fastutil.longs.Long2LongRBTreeMap.Entry tree
          A reference to the root entry.
protected  LongCollection values
          Cached collection of values.
 
Fields inherited from class it.unimi.dsi.fastutil.longs.AbstractLong2LongFunction
defRetValue
 
Constructor Summary
Long2LongRBTreeMap()
          Creates a new empty tree map.
Long2LongRBTreeMap(Comparator<? super Long> c)
          Creates a new empty tree map with the given comparator.
Long2LongRBTreeMap(long[] k, long[] v)
          Creates a new tree map using the elements of two parallel arrays.
Long2LongRBTreeMap(long[] k, long[] v, Comparator<? super Long> c)
          Creates a new tree map using the elements of two parallel arrays and the given comparator.
Long2LongRBTreeMap(Long2LongMap m)
          Creates a new tree map copying a given map.
Long2LongRBTreeMap(Long2LongSortedMap m)
          Creates a new tree map copying a given sorted map (and its Comparator).
Long2LongRBTreeMap(Map<? extends Long,? extends Long> m)
          Creates a new tree map copying a given map.
Long2LongRBTreeMap(SortedMap<Long,Long> m)
          Creates a new tree map copying a given sorted map (and its Comparator).
 
Method Summary
 void clear()
          Removes all associations from this function (optional operation).
 Long2LongRBTreeMap clone()
          Returns a deep copy of this tree map.
 LongComparator comparator()
          Returns the comparator associated with this sorted set, or null if it uses its keys' natural ordering.
 boolean containsKey(long k)
          Checks whether the given value is contained in AbstractLong2LongMap.keySet().
 boolean containsValue(long v)
          Checks whether the given value is contained in AbstractLong2LongMap.values().
 long firstLongKey()
           
 long get(long k)
          Returns the value to which the given key is mapped.
 Long2LongSortedMap headMap(long to)
          Returns a view of the portion of this sorted map whose keys are strictly less than toKey.
 boolean isEmpty()
           
 LongSortedSet keySet()
          Returns a type-specific sorted set view of the keys contained in this map.
 long lastLongKey()
           
 ObjectSortedSet<Long2LongMap.Entry> long2LongEntrySet()
          Returns a type-specific sorted-set view of the mappings contained in this map.
 long put(long k, long v)
          Adds a pair to the map.
 Long put(Long ok, Long ov)
          Delegates to the corresponding type-specific method, taking care of returning null on a missing key.
 long remove(long k)
          Removes the mapping with the given key.
 Long remove(Object ok)
          Delegates to the corresponding type-specific method, taking care of returning null on a missing key.
 int size()
          Returns the intended number of keys in this function, or -1 if no such number exists.
 Long2LongSortedMap subMap(long from, long to)
          Returns a view of the portion of this sorted map whose keys range from fromKey, inclusive, to toKey, exclusive.
 Long2LongSortedMap tailMap(long from)
          Returns a view of the portion of this sorted map whose keys are greater than or equal to fromKey.
 LongCollection values()
          Returns a type-specific collection view of the values contained in this map.
 
Methods inherited from class it.unimi.dsi.fastutil.longs.AbstractLong2LongSortedMap
entrySet, firstKey, headMap, lastKey, subMap, tailMap
 
Methods inherited from class it.unimi.dsi.fastutil.longs.AbstractLong2LongMap
containsValue, equals, hashCode, putAll, toString
 
Methods inherited from class it.unimi.dsi.fastutil.longs.AbstractLong2LongFunction
containsKey, defaultReturnValue, defaultReturnValue, get
 
Methods inherited from class java.lang.Object
finalize, getClass, notify, notifyAll, wait, wait, wait
 
Methods inherited from interface it.unimi.dsi.fastutil.longs.Long2LongFunction
defaultReturnValue, defaultReturnValue
 
Methods inherited from interface it.unimi.dsi.fastutil.Function
containsKey, get
 
Methods inherited from interface java.util.Map
containsKey, containsValue, equals, get, hashCode, putAll
 

Field Detail

tree

protected transient it.unimi.dsi.fastutil.longs.Long2LongRBTreeMap.Entry tree
A reference to the root entry.


count

protected int count
Number of entries in this map.


firstEntry

protected transient it.unimi.dsi.fastutil.longs.Long2LongRBTreeMap.Entry firstEntry
The first key in this map.


lastEntry

protected transient it.unimi.dsi.fastutil.longs.Long2LongRBTreeMap.Entry lastEntry
The last key in this map.


entries

protected transient volatile ObjectSortedSet<Long2LongMap.Entry> entries
Cached set of entries.


keys

protected transient volatile LongSortedSet keys
Cached set of keys.


values

protected transient volatile LongCollection values
Cached collection of values.


modified

protected transient boolean modified
The value of this variable remembers, after a put() or a remove(), whether the domain of the map has been modified.


storedComparator

protected Comparator<? super Long> storedComparator
This map's comparator, as provided in the constructor.


actualComparator

protected transient LongComparator actualComparator
This map's actual comparator; it may differ from storedComparator because it is always a type-specific comparator, so it could be derived from the former by wrapping.


serialVersionUID

public static final long serialVersionUID
See Also:
Constant Field Values
Constructor Detail

Long2LongRBTreeMap

public Long2LongRBTreeMap()
Creates a new empty tree map.


Long2LongRBTreeMap

public Long2LongRBTreeMap(Comparator<? super Long> c)
Creates a new empty tree map with the given comparator.

Parameters:
c - a (possibly type-specific) comparator.

Long2LongRBTreeMap

public Long2LongRBTreeMap(Map<? extends Long,? extends Long> m)
Creates a new tree map copying a given map.

Parameters:
m - a Map to be copied into the new tree map.

Long2LongRBTreeMap

public Long2LongRBTreeMap(SortedMap<Long,Long> m)
Creates a new tree map copying a given sorted map (and its Comparator).

Parameters:
m - a SortedMap to be copied into the new tree map.

Long2LongRBTreeMap

public Long2LongRBTreeMap(Long2LongMap m)
Creates a new tree map copying a given map.

Parameters:
m - a type-specific map to be copied into the new tree map.

Long2LongRBTreeMap

public Long2LongRBTreeMap(Long2LongSortedMap m)
Creates a new tree map copying a given sorted map (and its Comparator).

Parameters:
m - a type-specific sorted map to be copied into the new tree map.

Long2LongRBTreeMap

public Long2LongRBTreeMap(long[] k,
                          long[] v,
                          Comparator<? super Long> c)
Creates a new tree map using the elements of two parallel arrays and the given comparator.

Parameters:
k - the array of keys of the new tree map.
v - the array of corresponding values in the new tree map.
c - a (possibly type-specific) comparator.
Throws:
IllegalArgumentException - if k and v have different lengths.

Long2LongRBTreeMap

public Long2LongRBTreeMap(long[] k,
                          long[] v)
Creates a new tree map using the elements of two parallel arrays.

Parameters:
k - the array of keys of the new tree map.
v - the array of corresponding values in the new tree map.
Throws:
IllegalArgumentException - if k and v have different lengths.
Method Detail

put

public long put(long k,
                long v)
Description copied from interface: Long2LongFunction
Adds a pair to the map.

Specified by:
put in interface Long2LongFunction
Overrides:
put in class AbstractLong2LongFunction
Parameters:
k - the key.
v - the value.
Returns:
the old value, or the default return value if no value was present for the given key.
See Also:
Function.put(Object,Object)

remove

public long remove(long k)
Description copied from interface: Long2LongFunction
Removes the mapping with the given key.

Specified by:
remove in interface Long2LongFunction
Overrides:
remove in class AbstractLong2LongFunction
Returns:
the old value, or the default return value if no value was present for the given key.
See Also:
Function.remove(Object)

put

public Long put(Long ok,
                Long ov)
Description copied from class: AbstractLong2LongFunction
Delegates to the corresponding type-specific method, taking care of returning null on a missing key.

This method must check whether the provided key is in the map using containsKey(). Thus, it probes the map twice. Implementors of subclasses should override it with a more efficient method.

Specified by:
put in interface Function<Long,Long>
Specified by:
put in interface Map<Long,Long>
Overrides:
put in class AbstractLong2LongFunction
Parameters:
ok - the key.
ov - the value.
Returns:
the old value, or null if no value was present for the given key.
See Also:
Map.put(Object,Object)

remove

public Long remove(Object ok)
Description copied from class: AbstractLong2LongFunction
Delegates to the corresponding type-specific method, taking care of returning null on a missing key.

This method must check whether the provided key is in the map using containsKey(). Thus, it probes the map twice. Implementors of subclasses should override it with a more efficient method.

Specified by:
remove in interface Function<Long,Long>
Specified by:
remove in interface Map<Long,Long>
Overrides:
remove in class AbstractLong2LongFunction
Returns:
the old value, or null if no value was present for the given key.
See Also:
Map.remove(Object)

containsValue

public boolean containsValue(long v)
Description copied from class: AbstractLong2LongMap
Checks whether the given value is contained in AbstractLong2LongMap.values().

Specified by:
containsValue in interface Long2LongMap
Overrides:
containsValue in class AbstractLong2LongMap
See Also:
Map.containsValue(Object)

clear

public void clear()
Description copied from interface: Function
Removes all associations from this function (optional operation).

Specified by:
clear in interface Function<Long,Long>
Specified by:
clear in interface Map<Long,Long>
Overrides:
clear in class AbstractLong2LongFunction
See Also:
Map.clear()

containsKey

public boolean containsKey(long k)
Description copied from class: AbstractLong2LongMap
Checks whether the given value is contained in AbstractLong2LongMap.keySet().

Specified by:
containsKey in interface Long2LongFunction
Overrides:
containsKey in class AbstractLong2LongMap
See Also:
Function.containsKey(Object)

size

public int size()
Description copied from interface: Function
Returns the intended number of keys in this function, or -1 if no such number exists.

Most function implementations will have some knowledge of the intended number of keys in their domain. In some cases, however, this might not be possible.

Specified by:
size in interface Function<Long,Long>
Specified by:
size in interface Map<Long,Long>
Returns:
the intended number of keys in this function, or -1 if that number is not available.

isEmpty

public boolean isEmpty()
Specified by:
isEmpty in interface Map<Long,Long>
Overrides:
isEmpty in class AbstractLong2LongMap

get

public long get(long k)
Description copied from interface: Long2LongFunction
Returns the value to which the given key is mapped.

Specified by:
get in interface Long2LongFunction
Parameters:
k - the key.
Returns:
the corresponding value, or the default return value if no value was present for the given key.
See Also:
Function.get(Object)

firstLongKey

public long firstLongKey()
Specified by:
firstLongKey in interface Long2LongSortedMap
See Also:
SortedMap.firstKey()

lastLongKey

public long lastLongKey()
Specified by:
lastLongKey in interface Long2LongSortedMap
See Also:
SortedMap.lastKey()

long2LongEntrySet

public ObjectSortedSet<Long2LongMap.Entry> long2LongEntrySet()
Description copied from interface: Long2LongSortedMap
Returns a type-specific sorted-set view of the mappings contained in this map. Note that this specification strengthens the one given in the corresponding type-specific unsorted map.

Specified by:
long2LongEntrySet in interface Long2LongMap
Specified by:
long2LongEntrySet in interface Long2LongSortedMap
Returns:
a type-specific sorted-set view of the mappings contained in this map.
See Also:
Long2LongSortedMap.entrySet()

keySet

public LongSortedSet keySet()
Returns a type-specific sorted set view of the keys contained in this map.

In addition to the semantics of Map.keySet(), you can safely cast the set returned by this call to a type-specific sorted set interface.

Specified by:
keySet in interface Long2LongMap
Specified by:
keySet in interface Long2LongSortedMap
Specified by:
keySet in interface Map<Long,Long>
Specified by:
keySet in interface SortedMap<Long,Long>
Overrides:
keySet in class AbstractLong2LongSortedMap
Returns:
a type-specific sorted set view of the keys contained in this map.
See Also:
Map.keySet()

values

public LongCollection values()
Returns a type-specific collection view of the values contained in this map.

In addition to the semantics of Map.values(), you can safely cast the collection returned by this call to a type-specific collection interface.

Specified by:
values in interface Long2LongMap
Specified by:
values in interface Long2LongSortedMap
Specified by:
values in interface Map<Long,Long>
Specified by:
values in interface SortedMap<Long,Long>
Overrides:
values in class AbstractLong2LongSortedMap
Returns:
a type-specific collection view of the values contained in this map.
See Also:
Map.values()

comparator

public LongComparator comparator()
Description copied from interface: Long2LongSortedMap
Returns the comparator associated with this sorted set, or null if it uses its keys' natural ordering.

Note that this specification strengthens the one given in SortedMap.comparator().

Specified by:
comparator in interface Long2LongSortedMap
Specified by:
comparator in interface SortedMap<Long,Long>
See Also:
SortedMap.comparator()

headMap

public Long2LongSortedMap headMap(long to)
Description copied from interface: Long2LongSortedMap
Returns a view of the portion of this sorted map whose keys are strictly less than toKey.

Specified by:
headMap in interface Long2LongSortedMap
See Also:
SortedMap.headMap(Object)

tailMap

public Long2LongSortedMap tailMap(long from)
Description copied from interface: Long2LongSortedMap
Returns a view of the portion of this sorted map whose keys are greater than or equal to fromKey.

Specified by:
tailMap in interface Long2LongSortedMap
See Also:
SortedMap.tailMap(Object)

subMap

public Long2LongSortedMap subMap(long from,
                                 long to)
Description copied from interface: Long2LongSortedMap
Returns a view of the portion of this sorted map whose keys range from fromKey, inclusive, to toKey, exclusive.

Specified by:
subMap in interface Long2LongSortedMap
See Also:
SortedMap.subMap(Object,Object)

clone

public Long2LongRBTreeMap clone()
Returns a deep copy of this tree map.

This method performs a deep copy of this tree map; the data stored in the set, however, is not cloned. Note that this makes a difference only for object keys.

Overrides:
clone in class Object
Returns:
a deep copy of this tree map.


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