Class Reference2FloatArrayMap<K>
- java.lang.Object
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- it.unimi.dsi.fastutil.objects.AbstractReference2FloatFunction<K>
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- it.unimi.dsi.fastutil.objects.AbstractReference2FloatMap<K>
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- it.unimi.dsi.fastutil.objects.Reference2FloatArrayMap<K>
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- All Implemented Interfaces:
Function<K,java.lang.Float>
,Reference2FloatFunction<K>
,Reference2FloatMap<K>
,java.io.Serializable
,java.lang.Cloneable
,java.util.function.Function<K,java.lang.Float>
,java.util.function.ToDoubleFunction<K>
,java.util.Map<K,java.lang.Float>
public class Reference2FloatArrayMap<K> extends AbstractReference2FloatMap<K> implements java.io.Serializable, java.lang.Cloneable
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.
- See Also:
- Serialized Form
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Nested Class Summary
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Nested classes/interfaces inherited from class it.unimi.dsi.fastutil.objects.AbstractReference2FloatMap
AbstractReference2FloatMap.BasicEntry<K>, AbstractReference2FloatMap.BasicEntrySet<K>
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Nested classes/interfaces inherited from interface it.unimi.dsi.fastutil.objects.Reference2FloatMap
Reference2FloatMap.Entry<K>, Reference2FloatMap.FastEntrySet<K>
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Constructor Summary
Constructors Constructor Description Reference2FloatArrayMap()
Creates a new empty array map.Reference2FloatArrayMap(int capacity)
Creates a new empty array map of given capacity.Reference2FloatArrayMap(Reference2FloatMap<K> m)
Creates a new empty array map copying the entries of a given map.Reference2FloatArrayMap(java.lang.Object[] key, float[] value)
Creates a new empty array map with given key and value backing arrays.Reference2FloatArrayMap(java.lang.Object[] key, float[] value, int size)
Creates a new array map with given key and value backing arrays, using the given number of elements.Reference2FloatArrayMap(java.util.Map<? extends K,? extends java.lang.Float> m)
Creates a new empty array map copying the entries of a given map.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
clear()
Removes all of the mappings from this map (optional operation).Reference2FloatArrayMap<K>
clone()
Returns a deep copy of this map.boolean
containsKey(java.lang.Object k)
Returns true if this function contains a mapping for the specified key.boolean
containsValue(float v)
Returnstrue
if this map maps one or more keys to the specified value.float
getFloat(java.lang.Object k)
Returns the value to which the given key is mapped.boolean
isEmpty()
ReferenceSet<K>
keySet()
Returns a type-specific-set view of the keys of this map.float
put(K k, float v)
Adds a pair to the map (optional operation).Reference2FloatMap.FastEntrySet<K>
reference2FloatEntrySet()
Returns a type-specific set view of the mappings contained in this map.float
removeFloat(java.lang.Object k)
Removes the mapping with the given key (optional operation).int
size()
Returns the number of key/value mappings in this map.FloatCollection
values()
Returns a type-specific-set view of the values of this map.-
Methods inherited from class it.unimi.dsi.fastutil.objects.AbstractReference2FloatMap
equals, hashCode, putAll, toString
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Methods inherited from class it.unimi.dsi.fastutil.objects.AbstractReference2FloatFunction
defaultReturnValue, defaultReturnValue
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Methods inherited from interface java.util.Map
compute, computeIfAbsent, computeIfPresent, forEach, replaceAll
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Methods inherited from interface it.unimi.dsi.fastutil.objects.Reference2FloatFunction
andThen, andThen, andThen, andThen, andThen, andThen, andThen, andThen, andThen, applyAsDouble, compose, compose, compose, compose, compose, compose, compose, compose, compose
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Methods inherited from interface it.unimi.dsi.fastutil.objects.Reference2FloatMap
computeFloat, computeFloatIfAbsent, computeFloatIfAbsentPartial, computeFloatIfPresent, containsValue, defaultReturnValue, defaultReturnValue, entrySet, get, getOrDefault, getOrDefault, merge, mergeFloat, put, putIfAbsent, putIfAbsent, remove, remove, remove, replace, replace, replace, replace
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Constructor Detail
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Reference2FloatArrayMap
public Reference2FloatArrayMap(java.lang.Object[] key, float[] value)
Creates a new empty array map with given key and value backing arrays. The resulting map will have as many entries as the given arrays.It is responsibility of the caller that the elements of
key
are distinct.- Parameters:
key
- the key array.value
- the value array (it must have the same length askey
).
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Reference2FloatArrayMap
public Reference2FloatArrayMap()
Creates a new empty array map.
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Reference2FloatArrayMap
public Reference2FloatArrayMap(int capacity)
Creates a new empty array map of given capacity.- Parameters:
capacity
- the initial capacity.
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Reference2FloatArrayMap
public Reference2FloatArrayMap(Reference2FloatMap<K> m)
Creates a new empty array map copying the entries of a given map.- Parameters:
m
- a map.
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Reference2FloatArrayMap
public Reference2FloatArrayMap(java.util.Map<? extends K,? extends java.lang.Float> m)
Creates a new empty array map copying the entries of a given map.- Parameters:
m
- a map.
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Reference2FloatArrayMap
public Reference2FloatArrayMap(java.lang.Object[] key, float[] value, int size)
Creates a new array map with given key and value backing arrays, using the given number of elements.It is responsibility of the caller that the first
size
elements ofkey
are distinct.- Parameters:
key
- the key array.value
- the value array (it must have the same length askey
).size
- the number of valid elements inkey
andvalue
.
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Method Detail
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reference2FloatEntrySet
public Reference2FloatMap.FastEntrySet<K> reference2FloatEntrySet()
Description copied from interface:Reference2FloatMap
Returns a type-specific set view of the mappings contained in this map.This method is necessary because there is no inheritance along type parameters: it is thus impossible to strengthen
Map.entrySet()
so that it returns anObjectSet
of type-specific entries (the latter makes it possible to access keys and values with type-specific methods).- Specified by:
reference2FloatEntrySet
in interfaceReference2FloatMap<K>
- Returns:
- a type-specific set view of the mappings contained in this map.
- See Also:
Map.entrySet()
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getFloat
public float getFloat(java.lang.Object k)
Description copied from interface:Reference2FloatFunction
Returns the value to which the given key is mapped.- Specified by:
getFloat
in interfaceReference2FloatFunction<K>
- 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)
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size
public int size()
Description copied from interface:Reference2FloatMap
Returns the number of key/value mappings in this map. If the map contains more thanInteger.MAX_VALUE
elements, returnsInteger.MAX_VALUE
.
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clear
public void clear()
Description copied from interface:Reference2FloatMap
Removes all of the mappings from this map (optional operation). The map will be empty after this call returns.
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containsKey
public boolean containsKey(java.lang.Object k)
Description copied from interface:Reference2FloatMap
Returns true if this function contains a mapping for the specified key.- Specified by:
containsKey
in interfaceFunction<K,java.lang.Float>
- Specified by:
containsKey
in interfacejava.util.Map<K,java.lang.Float>
- Specified by:
containsKey
in interfaceReference2FloatMap<K>
- Overrides:
containsKey
in classAbstractReference2FloatMap<K>
- Parameters:
k
- the key.- Returns:
- true if this function associates a value to
key
. - See Also:
Map.containsKey(Object)
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containsValue
public boolean containsValue(float v)
Description copied from interface:Reference2FloatMap
Returnstrue
if this map maps one or more keys to the specified value.- Specified by:
containsValue
in interfaceReference2FloatMap<K>
- Overrides:
containsValue
in classAbstractReference2FloatMap<K>
- See Also:
Map.containsValue(Object)
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isEmpty
public boolean isEmpty()
- Specified by:
isEmpty
in interfacejava.util.Map<K,java.lang.Float>
- Overrides:
isEmpty
in classAbstractReference2FloatMap<K>
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put
public float put(K k, float v)
Description copied from interface:Reference2FloatFunction
Adds a pair to the map (optional operation).- Specified by:
put
in interfaceReference2FloatFunction<K>
- 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)
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removeFloat
public float removeFloat(java.lang.Object k)
Description copied from interface:Reference2FloatFunction
Removes the mapping with the given key (optional operation).- Specified by:
removeFloat
in interfaceReference2FloatFunction<K>
- Parameters:
k
- the key.- Returns:
- the old value, or the default return value if no value was present for the given key.
- See Also:
Function.remove(Object)
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keySet
public ReferenceSet<K> keySet()
Description copied from class:AbstractReference2FloatMap
Returns a type-specific-set view of the keys of this map.The view is backed by the set returned by
Map.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.- Specified by:
keySet
in interfacejava.util.Map<K,java.lang.Float>
- Specified by:
keySet
in interfaceReference2FloatMap<K>
- Overrides:
keySet
in classAbstractReference2FloatMap<K>
- Returns:
- a set view of the keys of this map; it may be safely cast to a type-specific interface.
- See Also:
Map.keySet()
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values
public FloatCollection values()
Description copied from class:AbstractReference2FloatMap
Returns a type-specific-set view of the values of this map.The view is backed by the set returned by
Map.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.- Specified by:
values
in interfacejava.util.Map<K,java.lang.Float>
- Specified by:
values
in interfaceReference2FloatMap<K>
- Overrides:
values
in classAbstractReference2FloatMap<K>
- Returns:
- a set view of the values of this map; it may be safely cast to a type-specific interface.
- See Also:
Map.values()
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clone
public Reference2FloatArrayMap<K> clone()
Returns a deep copy of this map.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.
- Returns:
- a deep copy of this map.
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