Package it.unimi.dsi.fastutil.objects
Class Reference2DoubleMaps.EmptyMap<K>
- java.lang.Object
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- it.unimi.dsi.fastutil.objects.AbstractReference2DoubleFunction<K>
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- it.unimi.dsi.fastutil.objects.Reference2DoubleFunctions.EmptyFunction<K>
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- it.unimi.dsi.fastutil.objects.Reference2DoubleMaps.EmptyMap<K>
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- All Implemented Interfaces:
Function<K,java.lang.Double>
,Reference2DoubleFunction<K>
,Reference2DoubleMap<K>
,java.io.Serializable
,java.lang.Cloneable
,java.util.function.Function<K,java.lang.Double>
,java.util.function.ToDoubleFunction<K>
,java.util.Map<K,java.lang.Double>
- Direct Known Subclasses:
Reference2DoubleSortedMaps.EmptySortedMap
- Enclosing class:
- Reference2DoubleMaps
public static class Reference2DoubleMaps.EmptyMap<K> extends Reference2DoubleFunctions.EmptyFunction<K> implements Reference2DoubleMap<K>, java.io.Serializable, java.lang.Cloneable
An immutable class representing an empty type-specific map.This class may be useful to implement your own in case you subclass a type-specific map.
- See Also:
- Serialized Form
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Nested Class Summary
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Nested classes/interfaces inherited from interface it.unimi.dsi.fastutil.objects.Reference2DoubleMap
Reference2DoubleMap.Entry<K>, Reference2DoubleMap.FastEntrySet<K>
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Method Summary
All Methods Instance Methods Concrete Methods Deprecated Methods Modifier and Type Method Description java.lang.Object
clone()
boolean
containsValue(double v)
Returnstrue
if this map maps one or more keys to the specified value.boolean
containsValue(java.lang.Object ov)
Deprecated.Please use the corresponding type-specific method instead.boolean
equals(java.lang.Object o)
int
hashCode()
boolean
isEmpty()
ReferenceSet<K>
keySet()
void
putAll(java.util.Map<? extends K,? extends java.lang.Double> m)
ObjectSet<Reference2DoubleMap.Entry<K>>
reference2DoubleEntrySet()
Returns a type-specific set view of the mappings contained in this map.java.lang.String
toString()
DoubleCollection
values()
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Methods inherited from class it.unimi.dsi.fastutil.objects.Reference2DoubleFunctions.EmptyFunction
clear, containsKey, defaultReturnValue, defaultReturnValue, getDouble, size
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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.Reference2DoubleFunction
andThenByte, andThenChar, andThenDouble, andThenFloat, andThenInt, andThenLong, andThenObject, andThenReference, andThenShort, applyAsDouble, composeByte, composeChar, composeDouble, composeFloat, composeInt, composeLong, composeObject, composeReference, composeShort, getDouble, put, removeDouble
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Methods inherited from interface it.unimi.dsi.fastutil.objects.Reference2DoubleMap
clear, computeDouble, computeDoubleIfAbsent, computeDoubleIfAbsentPartial, computeDoubleIfPresent, containsKey, defaultReturnValue, defaultReturnValue, entrySet, get, getOrDefault, getOrDefault, merge, mergeDouble, put, putIfAbsent, putIfAbsent, remove, remove, remove, replace, replace, replace, replace, size
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Method Detail
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containsValue
public boolean containsValue(double v)
Description copied from interface:Reference2DoubleMap
Returnstrue
if this map maps one or more keys to the specified value.- Specified by:
containsValue
in interfaceReference2DoubleMap<K>
- See Also:
Map.containsValue(Object)
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containsValue
@Deprecated public boolean containsValue(java.lang.Object ov)
Deprecated.Please use the corresponding type-specific method instead.- Specified by:
containsValue
in interfacejava.util.Map<K,java.lang.Double>
- Specified by:
containsValue
in interfaceReference2DoubleMap<K>
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putAll
public void putAll(java.util.Map<? extends K,? extends java.lang.Double> m)
- Specified by:
putAll
in interfacejava.util.Map<K,java.lang.Double>
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reference2DoubleEntrySet
public ObjectSet<Reference2DoubleMap.Entry<K>> reference2DoubleEntrySet()
Description copied from interface:Reference2DoubleMap
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:
reference2DoubleEntrySet
in interfaceReference2DoubleMap<K>
- Returns:
- a type-specific set view of the mappings contained in this map.
- See Also:
Map.entrySet()
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keySet
public ReferenceSet<K> keySet()
Description copied from interface:Reference2DoubleMap
Note that this specification strengthens the one given in
Map.keySet()
.- Specified by:
keySet
in interfacejava.util.Map<K,java.lang.Double>
- Specified by:
keySet
in interfaceReference2DoubleMap<K>
- Returns:
- a set view of the keys contained in this map.
- See Also:
Map.keySet()
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values
public DoubleCollection values()
Description copied from interface:Reference2DoubleMap
Note that this specification strengthens the one given in
Map.values()
.- Specified by:
values
in interfacejava.util.Map<K,java.lang.Double>
- Specified by:
values
in interfaceReference2DoubleMap<K>
- Returns:
- a set view of the values contained in this map.
- See Also:
Map.values()
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clone
public java.lang.Object clone()
- Overrides:
clone
in classReference2DoubleFunctions.EmptyFunction<K>
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isEmpty
public boolean isEmpty()
- Specified by:
isEmpty
in interfacejava.util.Map<K,java.lang.Double>
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hashCode
public int hashCode()
- Specified by:
hashCode
in interfacejava.util.Map<K,java.lang.Double>
- Overrides:
hashCode
in classReference2DoubleFunctions.EmptyFunction<K>
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equals
public boolean equals(java.lang.Object o)
- Specified by:
equals
in interfacejava.util.Map<K,java.lang.Double>
- Overrides:
equals
in classReference2DoubleFunctions.EmptyFunction<K>
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toString
public java.lang.String toString()
- Overrides:
toString
in classReference2DoubleFunctions.EmptyFunction<K>
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