Class Double2DoubleMaps.EmptyMap

java.lang.Object

it.unimi.dsi.fastutil.doubles.AbstractDouble2DoubleFunction

it.unimi.dsi.fastutil.doubles.Double2DoubleFunctions.EmptyFunction

it.unimi.dsi.fastutil.doubles.Double2DoubleMaps.EmptyMap

All Implemented Interfaces:

Double2DoubleFunction, Double2DoubleMap, Function<Double,Double>, Serializable, Cloneable, DoubleUnaryOperator, Function<Double,Double>, Map<Double,Double>

Direct Known Subclasses:

Double2DoubleSortedMaps.EmptySortedMap

Enclosing class:

Double2DoubleMaps

public static class Double2DoubleMaps.EmptyMap
extends Double2DoubleFunctions.EmptyFunction
implements Double2DoubleMap, Serializable, 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

Nested Class Summary

Nested classes/interfaces inherited from interface it.unimi.dsi.fastutil.doubles.Double2DoubleMap

Double2DoubleMap.Entry, Double2DoubleMap.FastEntrySet

Method Summary

Modifier and Type	Method	Description
Object	clone()
boolean	containsValue(double v)	Returns true if this map maps one or more keys to the specified value.
boolean	containsValue(Object ov)	Deprecated. Please use the corresponding type-specific method instead.
ObjectSet<Double2DoubleMap.Entry>	double2DoubleEntrySet()	Returns a type-specific set view of the mappings contained in this map.
boolean	equals(Object o)
void	forEach(DoubleDoubleBiConsumer consumer)	Performs the given action for each entry in this map until all entries have been processed or the action throws an exception.
double	getOrDefault(double key, double defaultValue)	Returns the value associated by this function to the specified key, or give the specified value if not present.
Double	getOrDefault(Object key, Double defaultValue)	Deprecated.
int	hashCode()
boolean	isEmpty()
DoubleSet	keySet()
void	putAll(Map<? extends Double, ? extends Double> m)
String	toString()
DoubleCollection	values()

Methods inherited from class it.unimi.dsi.fastutil.doubles.Double2DoubleFunctions.EmptyFunction

clear, containsKey, defaultReturnValue, defaultReturnValue, get, size

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface it.unimi.dsi.fastutil.doubles.Double2DoubleFunction

andThen, andThenByte, andThenChar, andThenDouble, andThenFloat, andThenInt, andThenLong, andThenObject, andThenReference, andThenShort, applyAsDouble, compose, composeByte, composeChar, composeDouble, composeFloat, composeInt, composeLong, composeObject, composeReference, composeShort, get, put, remove

Methods inherited from interface it.unimi.dsi.fastutil.doubles.Double2DoubleMap

clear, compute, compute, computeIfAbsent, computeIfAbsent, computeIfAbsent, computeIfAbsentNullable, computeIfAbsentPartial, computeIfPresent, computeIfPresent, containsKey, containsKey, defaultReturnValue, defaultReturnValue, entrySet, forEach, get, merge, merge, mergeDouble, mergeDouble, put, putIfAbsent, putIfAbsent, remove, remove, remove, replace, replace, replace, replace, size

Methods inherited from interface java.util.function.DoubleUnaryOperator

andThen, compose

Methods inherited from interface it.unimi.dsi.fastutil.Function

apply

Methods inherited from interface java.util.Map

replaceAll

Method Details

containsValue

public boolean containsValue(double v)

Description copied from interface: Double2DoubleMap

Returns true if this map maps one or more keys to the specified value.

Specified by:

containsValue in interface Double2DoubleMap

See Also:

• Map.containsValue(Object)

getOrDefault

@Deprecated
public Double getOrDefault(Object key,
 Double defaultValue)

Deprecated.

Description copied from interface: Double2DoubleFunction

Returns the value associated by this function to the specified key, or give the specified value if not present.

Specified by:

getOrDefault in interface Double2DoubleFunction

Specified by:

getOrDefault in interface Double2DoubleMap

Specified by:

getOrDefault in interface Function<Double,Double>

Specified by:

getOrDefault in interface Map<Double,Double>

Parameters:

key - the key.

defaultValue - the default value to return if not present.

Returns:

the corresponding value, or defaultValue if no value was present for the given key.

See Also:

• Map.getOrDefault(Object, Object)

getOrDefault

public double getOrDefault(double key,
 double defaultValue)

Description copied from interface: Double2DoubleFunction

Returns the value associated by this function to the specified key, or give the specified value if not present.

Specified by:

getOrDefault in interface Double2DoubleFunction

Specified by:

getOrDefault in interface Double2DoubleMap

Overrides:

getOrDefault in class Double2DoubleFunctions.EmptyFunction

Parameters:

key - the key.

defaultValue - the value to return if not present.

Returns:

the corresponding value, or defaultValue if no value was present for the given key.

See Also:

• Function.getOrDefault(Object, Object)

forEach

public void forEach(DoubleDoubleBiConsumer consumer)

Description copied from interface: Double2DoubleMap

Performs the given action for each entry in this map until all entries have been processed or the action throws an exception.

This default implementation just delegates to forEach on the type-specific entry set, taking care of using fastForEach if available.

Specified by:

forEach in interface Double2DoubleMap

See Also:

• Map.forEach(java.util.function.BiConsumer)

containsValue

@Deprecated
public boolean containsValue(Object ov)

Deprecated.

Please use the corresponding type-specific method instead.

Specified by:

containsValue in interface Double2DoubleMap

Specified by:

containsValue in interface Map<Double,Double>

putAll

public void putAll(Map<? extends Double, ? extends Double> m)

Specified by:

putAll in interface Map<Double,Double>

double2DoubleEntrySet

public ObjectSet<Double2DoubleMap.Entry> double2DoubleEntrySet()

Description copied from interface: Double2DoubleMap

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 an ObjectSet of type-specific entries (the latter makes it possible to access keys and values with type-specific methods).

Specified by:

double2DoubleEntrySet in interface Double2DoubleMap

Returns:

a type-specific set view of the mappings contained in this map.

See Also:

• Map.entrySet()

keySet

public DoubleSet keySet()

Description copied from interface: Double2DoubleMap

Specified by:

keySet in interface Double2DoubleMap

Specified by:

keySet in interface Map<Double,Double>

Returns:

a set view of the keys contained in this map.

See Also:

• Map.keySet()

values

public DoubleCollection values()

Description copied from interface: Double2DoubleMap

Specified by:

values in interface Double2DoubleMap

Specified by:

values in interface Map<Double,Double>

Returns:

a set view of the values contained in this map.

See Also:

• Map.values()

clone

public Object clone()

Overrides:

clone in class Double2DoubleFunctions.EmptyFunction

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface Map<Double,Double>

hashCode

public int hashCode()

Specified by:

hashCode in interface Map<Double,Double>

Overrides:

hashCode in class Double2DoubleFunctions.EmptyFunction

equals

public boolean equals(Object o)

Specified by:

equals in interface Map<Double,Double>

Overrides:

equals in class Double2DoubleFunctions.EmptyFunction

toString

public String toString()

Overrides:

toString in class Double2DoubleFunctions.EmptyFunction