Package it.unimi.dsi.fastutil.objects
Class Object2FloatFunctions.EmptyFunction<K>
- java.lang.Object
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- it.unimi.dsi.fastutil.objects.AbstractObject2FloatFunction<K>
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- it.unimi.dsi.fastutil.objects.Object2FloatFunctions.EmptyFunction<K>
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- All Implemented Interfaces:
Function<K,Float>
,Object2FloatFunction<K>
,Serializable
,Cloneable
,Function<K,Float>
,ToDoubleFunction<K>
- Direct Known Subclasses:
Object2FloatMaps.EmptyMap
- Enclosing class:
- Object2FloatFunctions
public static class Object2FloatFunctions.EmptyFunction<K> extends AbstractObject2FloatFunction<K> implements Serializable, Cloneable
An immutable class representing an empty type-specific function.This class may be useful to implement your own in case you subclass a type-specific function.
- See Also:
- Serialized Form
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
clear()
Removes all associations from this function (optional operation).Object
clone()
boolean
containsKey(Object k)
Returns true if this function contains a mapping for the specified key.float
defaultReturnValue()
Gets the default return value.void
defaultReturnValue(float defRetValue)
Sets the default return value (optional operation).boolean
equals(Object o)
float
getFloat(Object k)
Returns the value to which the given key is mapped.int
hashCode()
int
size()
Returns the intended number of keys in this function, or -1 if no such number exists.String
toString()
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Methods inherited from interface it.unimi.dsi.fastutil.objects.Object2FloatFunction
andThenByte, andThenChar, andThenDouble, andThenFloat, andThenInt, andThenLong, andThenObject, andThenReference, andThenShort, applyAsDouble, composeByte, composeChar, composeDouble, composeFloat, composeInt, composeLong, composeObject, composeReference, composeShort, get, put, put, remove, removeFloat
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Method Detail
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getFloat
public float getFloat(Object k)
Description copied from interface:Object2FloatFunction
Returns the value to which the given key is mapped.- Specified by:
getFloat
in interfaceObject2FloatFunction<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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containsKey
public boolean containsKey(Object k)
Description copied from interface:Function
Returns true if this function contains a mapping for the specified key.Note that for some kind of functions (e.g., hashes) this method will always return true. This default implementation, in particular, always return true.
- Specified by:
containsKey
in interfaceFunction<K,Float>
- Parameters:
k
- the key.- Returns:
- true if this function associates a value to
key
. - See Also:
Map.containsKey(Object)
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defaultReturnValue
public float defaultReturnValue()
Description copied from interface:Object2FloatFunction
Gets the default return value.This default implementation just return the default null value of the type (
null
for objects, 0 for scalars, false for Booleans).- Specified by:
defaultReturnValue
in interfaceObject2FloatFunction<K>
- Overrides:
defaultReturnValue
in classAbstractObject2FloatFunction<K>
- Returns:
- the current default return value.
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defaultReturnValue
public void defaultReturnValue(float defRetValue)
Description copied from interface:Object2FloatFunction
Sets the default return value (optional operation). This value must be returned by type-specific versions ofget()
,put()
andremove()
to denote that the map does not contain the specified key. It must be 0/false
/null
by default.- Specified by:
defaultReturnValue
in interfaceObject2FloatFunction<K>
- Overrides:
defaultReturnValue
in classAbstractObject2FloatFunction<K>
- Parameters:
defRetValue
- the new default return value.- See Also:
Object2FloatFunction.defaultReturnValue()
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size
public int size()
Description copied from interface:Function
Returns the intended number of keys in this function, or -1 if no such number exists.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. This default implementation, in particular, returns -1.
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clear
public void clear()
Description copied from interface:Function
Removes all associations from this function (optional operation).- Specified by:
clear
in interfaceFunction<K,Float>
- See Also:
Map.clear()
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clone
public Object clone()
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