Class AbstractByte2DoubleMap
- java.lang.Object
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- it.unimi.dsi.fastutil.bytes.AbstractByte2DoubleFunction
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- it.unimi.dsi.fastutil.bytes.AbstractByte2DoubleMap
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- All Implemented Interfaces:
Byte2DoubleFunction
,Byte2DoubleMap
,Function<java.lang.Byte,java.lang.Double>
,java.io.Serializable
,java.util.function.Function<java.lang.Byte,java.lang.Double>
,java.util.function.IntToDoubleFunction
,java.util.Map<java.lang.Byte,java.lang.Double>
- Direct Known Subclasses:
AbstractByte2DoubleSortedMap
,Byte2DoubleArrayMap
,Byte2DoubleOpenCustomHashMap
,Byte2DoubleOpenHashMap
public abstract class AbstractByte2DoubleMap extends AbstractByte2DoubleFunction implements Byte2DoubleMap, java.io.Serializable
An abstract class providing basic methods for maps implementing a type-specific interface.Optional operations just throw an
UnsupportedOperationException
. Generic versions of accessors delegate to the corresponding type-specific counterparts following the interface rules (they take care of returningnull
on a missing key).As a further help, this class provides a
BasicEntry
inner class that implements a type-specific version ofMap.Entry
; it is particularly useful for those classes that do not implement their own entries (e.g., most immutable maps).- See Also:
- Serialized Form
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Nested Class Summary
Nested Classes Modifier and Type Class Description static class
AbstractByte2DoubleMap.BasicEntry
This class provides a basic but complete type-specific entry class for all those maps implementations that do not have entries on their own (e.g., most immutable maps).static class
AbstractByte2DoubleMap.BasicEntrySet
This class provides a basic implementation for an Entry set which forwards some queries to the map.-
Nested classes/interfaces inherited from interface it.unimi.dsi.fastutil.bytes.Byte2DoubleMap
Byte2DoubleMap.Entry, Byte2DoubleMap.FastEntrySet
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
containsKey(byte k)
Returns true if this function contains a mapping for the specified key.boolean
containsValue(double v)
Returnstrue
if this map maps one or more keys to the specified value.boolean
equals(java.lang.Object o)
int
hashCode()
Returns a hash code for this map.boolean
isEmpty()
ByteSet
keySet()
Returns a type-specific-set view of the keys of this map.double
mergeDouble(byte key, double value, DoubleBinaryOperator remappingFunction)
If the specified key is not already associated with a value, associates it with the givenvalue
.void
putAll(java.util.Map<? extends java.lang.Byte,? extends java.lang.Double> m)
java.lang.String
toString()
DoubleCollection
values()
Returns a type-specific-set view of the values of this map.-
Methods inherited from class it.unimi.dsi.fastutil.bytes.AbstractByte2DoubleFunction
defaultReturnValue, defaultReturnValue
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Methods inherited from interface it.unimi.dsi.fastutil.bytes.Byte2DoubleFunction
andThen, andThenByte, andThenChar, andThenDouble, andThenFloat, andThenInt, andThenLong, andThenObject, andThenReference, andThenShort, applyAsDouble, compose, composeByte, composeChar, composeDouble, composeFloat, composeInt, composeLong, composeObject, composeReference, composeShort, get, put, remove
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Methods inherited from interface it.unimi.dsi.fastutil.bytes.Byte2DoubleMap
byte2DoubleEntrySet, clear, compute, compute, computeIfAbsent, computeIfAbsent, computeIfAbsent, computeIfAbsentNullable, computeIfAbsentPartial, computeIfPresent, computeIfPresent, containsKey, containsValue, defaultReturnValue, defaultReturnValue, entrySet, forEach, get, getOrDefault, getOrDefault, merge, merge, mergeDouble, put, putIfAbsent, putIfAbsent, remove, remove, remove, replace, replace, replace, replace, size
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Method Detail
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containsKey
public boolean containsKey(byte k)
Returns true if this function contains a mapping for the specified key.- Specified by:
containsKey
in interfaceByte2DoubleFunction
- Specified by:
containsKey
in interfaceByte2DoubleMap
- Parameters:
k
- the key.- Returns:
- true if this function associates a value to
key
. - See Also:
Map.containsKey(Object)
- Implementation Specification:
- This implementation does a linear search over the entry set, finding an entry that has the key specified.
If you override
keySet()
, you should probably override this method too to take advantage of the (presumably) faster key membership test yourkeySet()
provides.If you override this method but not
keySet()
, then the returned key set will take advantage of this method.
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containsValue
public boolean containsValue(double v)
Returnstrue
if this map maps one or more keys to the specified value.- Specified by:
containsValue
in interfaceByte2DoubleMap
- See Also:
Map.containsValue(Object)
- Implementation Specification:
- This implementation does a linear search over the entry set, finding an entry that has the value specified.
If you override
values()
, you should probably override this method too to take advantage of the (presumably) faster value membership test yourvalues()
provides.If you override this method but not
values()
, then the returned values collection will take advantage of this method.
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isEmpty
public boolean isEmpty()
- Specified by:
isEmpty
in interfacejava.util.Map<java.lang.Byte,java.lang.Double>
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mergeDouble
public final double mergeDouble(byte key, double value, DoubleBinaryOperator remappingFunction)
If the specified key is not already associated with a value, associates it with the givenvalue
. Otherwise, replaces the associated value with the results of the given remapping function.- Specified by:
mergeDouble
in interfaceByte2DoubleMap
- Parameters:
key
- key with which the resulting value is to be associated.value
- the value to be merged with the existing value associated with the key or, if no existing value is associated with the key, to be associated with the key.remappingFunction
- the function to recompute a value if present.- See Also:
Map.merge(Object, Object, java.util.function.BiFunction)
- Implementation Specification:
- This method just delegates to the interface default method, as the default method, but it is final, so it cannot be overridden.
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keySet
public ByteSet keySet()
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 interfaceByte2DoubleMap
- Specified by:
keySet
in interfacejava.util.Map<java.lang.Byte,java.lang.Double>
- 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 DoubleCollection values()
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 interfaceByte2DoubleMap
- Specified by:
values
in interfacejava.util.Map<java.lang.Byte,java.lang.Double>
- 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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putAll
public void putAll(java.util.Map<? extends java.lang.Byte,? extends java.lang.Double> m)
- Specified by:
putAll
in interfacejava.util.Map<java.lang.Byte,java.lang.Double>
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hashCode
public int hashCode()
Returns a hash code for this map. The hash code of a map is computed by summing the hash codes of its entries.- Specified by:
hashCode
in interfacejava.util.Map<java.lang.Byte,java.lang.Double>
- Overrides:
hashCode
in classjava.lang.Object
- Returns:
- a hash code for this map.
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equals
public boolean equals(java.lang.Object o)
- Specified by:
equals
in interfacejava.util.Map<java.lang.Byte,java.lang.Double>
- Overrides:
equals
in classjava.lang.Object
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toString
public java.lang.String toString()
- Overrides:
toString
in classjava.lang.Object
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