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java.lang.Objectit.unimi.dsi.fastutil.ints.AbstractInt2LongFunction
it.unimi.dsi.fastutil.ints.AbstractInt2LongMap
it.unimi.dsi.fastutil.ints.Int2LongArrayMap
public class Int2LongArrayMap
A simple, brute-force implementation of a map based on two parallel backing arrays.
The main purpose of this implementation is that of wrapping cleanly the brute-force approach to the storage of a very small number of pairs: just put them into two parallel arrays and scan linearly to find an item.
Nested Class Summary |
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Nested classes/interfaces inherited from class it.unimi.dsi.fastutil.ints.AbstractInt2LongMap |
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AbstractInt2LongMap.BasicEntry |
Nested classes/interfaces inherited from interface it.unimi.dsi.fastutil.ints.Int2LongMap |
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Int2LongMap.Entry, Int2LongMap.FastEntrySet |
Constructor Summary | |
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Int2LongArrayMap()
Creates a new empty array map. |
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Int2LongArrayMap(int capacity)
Creates a new empty array map of given capacity. |
|
Int2LongArrayMap(int[] key,
long[] value)
Creates a new empty array map with given key and value backing arrays. |
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Int2LongArrayMap(int[] key,
long[] value,
int size)
Creates a new array map with given key and value backing arrays, using the given number of elements. |
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Int2LongArrayMap(Int2LongMap m)
Creates a new empty array map copying the entries of a given map. |
Method Summary | |
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void |
clear()
Removes all associations from this function (optional operation). |
java.lang.Object |
clone()
Returns a deep copy of this map. |
boolean |
containsKey(int k)
Checks whether the given value is contained in AbstractInt2LongMap.keySet() . |
boolean |
containsValue(long v)
Checks whether the given value is contained in AbstractInt2LongMap.values() . |
long |
get(int k)
Returns the value to which the given key is mapped. |
Int2LongMap.FastEntrySet |
int2LongEntrySet()
Returns a type-specific set view of the mappings contained in this map. |
boolean |
isEmpty()
|
IntSet |
keySet()
Returns a type-specific-set view of the keys of this map. |
long |
put(int k,
long v)
Adds a pair to the map. |
long |
remove(int k)
Removes the mapping with the given key. |
int |
size()
Returns the intended number of keys in this function, or -1 if no such number exists. |
LongCollection |
values()
Returns a type-specific-set view of the values of this map. |
Methods inherited from class it.unimi.dsi.fastutil.ints.AbstractInt2LongMap |
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containsValue, entrySet, equals, hashCode, putAll, toString |
Methods inherited from class it.unimi.dsi.fastutil.ints.AbstractInt2LongFunction |
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containsKey, defaultReturnValue, defaultReturnValue, get, put, remove |
Methods inherited from class java.lang.Object |
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getClass, notify, notifyAll, wait, wait, wait |
Methods inherited from interface it.unimi.dsi.fastutil.ints.Int2LongFunction |
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defaultReturnValue, defaultReturnValue |
Methods inherited from interface it.unimi.dsi.fastutil.Function |
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containsKey, get, put, remove |
Methods inherited from interface java.util.Map |
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containsKey, get, put, remove |
Constructor Detail |
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public Int2LongArrayMap(int[] key, long[] value)
key
- the key array.value
- the value array (it must have the same length as key
).public Int2LongArrayMap()
public Int2LongArrayMap(int capacity)
capacity
- the initial capacity.public Int2LongArrayMap(Int2LongMap m)
m
- a map.public Int2LongArrayMap(int[] key, long[] value, int size)
key
- the key array.value
- the value array (it must have the same length as key
).size
- the number of valid elements in key
and value
.Method Detail |
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public Int2LongMap.FastEntrySet int2LongEntrySet()
Int2LongMap
This method is necessary because there is no inheritance along
type parameters: it is thus impossible to strengthen Int2LongMap.entrySet()
so that it returns an ObjectSet
of objects of type Int2LongMap.Entry
(the latter makes it possible to
access keys and values with type-specific methods).
int2LongEntrySet
in interface Int2LongMap
Int2LongMap.entrySet()
public long get(int k)
Int2LongFunction
get
in interface Int2LongFunction
k
- the key.
Function.get(Object)
public int size()
Function
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.
size
in interface Function<java.lang.Integer,java.lang.Long>
size
in interface java.util.Map<java.lang.Integer,java.lang.Long>
public void clear()
Function
clear
in interface Function<java.lang.Integer,java.lang.Long>
clear
in interface java.util.Map<java.lang.Integer,java.lang.Long>
clear
in class AbstractInt2LongFunction
Map.clear()
public boolean containsKey(int k)
AbstractInt2LongMap
AbstractInt2LongMap.keySet()
.
containsKey
in interface Int2LongFunction
containsKey
in class AbstractInt2LongMap
Function.containsKey(Object)
public boolean containsValue(long v)
AbstractInt2LongMap
AbstractInt2LongMap.values()
.
containsValue
in interface Int2LongMap
containsValue
in class AbstractInt2LongMap
Map.containsValue(Object)
public boolean isEmpty()
isEmpty
in interface java.util.Map<java.lang.Integer,java.lang.Long>
isEmpty
in class AbstractInt2LongMap
public long put(int k, long v)
Int2LongFunction
put
in interface Int2LongFunction
put
in class AbstractInt2LongFunction
k
- the key.v
- the value.
Function.put(Object,Object)
public long remove(int k)
Int2LongFunction
remove
in interface Int2LongFunction
remove
in class AbstractInt2LongFunction
Function.remove(Object)
public IntSet keySet()
AbstractInt2LongMap
The view is backed by the set returned by AbstractInt2LongMap.entrySet()
. Note that
no attempt is made at caching the result of this method, as this would
require adding some attributes that lightweight implementations would
not need. Subclasses may easily override this policy by calling
this method and caching the result, but implementors are encouraged to
write more efficient ad-hoc implementations.
keySet
in interface Int2LongMap
keySet
in interface java.util.Map<java.lang.Integer,java.lang.Long>
keySet
in class AbstractInt2LongMap
Map.keySet()
public LongCollection values()
AbstractInt2LongMap
The view is backed by the set returned by AbstractInt2LongMap.entrySet()
. Note that
no attempt is made at caching the result of this method, as this would
require adding some attributes that lightweight implementations would
not need. Subclasses may easily override this policy by calling
this method and caching the result, but implementors are encouraged to
write more efficient ad-hoc implementations.
values
in interface Int2LongMap
values
in interface java.util.Map<java.lang.Integer,java.lang.Long>
values
in class AbstractInt2LongMap
Map.values()
public java.lang.Object clone()
This method performs a deep copy of this hash map; the data stored in the map, however, is not cloned. Note that this makes a difference only for object keys.
clone
in class java.lang.Object
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