Package it.unimi.dsi.fastutil.ints
Class Int2IntFunctions.Singleton
- java.lang.Object
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- it.unimi.dsi.fastutil.ints.AbstractInt2IntFunction
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- it.unimi.dsi.fastutil.ints.Int2IntFunctions.Singleton
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- All Implemented Interfaces:
Function<Integer,Integer>
,Int2IntFunction
,Serializable
,Cloneable
,Function<Integer,Integer>
,IntUnaryOperator
- Direct Known Subclasses:
Int2IntMaps.Singleton
- Enclosing class:
- Int2IntFunctions
public static class Int2IntFunctions.Singleton extends AbstractInt2IntFunction implements Serializable, Cloneable
An immutable class representing a type-specific singleton function. Note that the default return value is still settable.Note that albeit the function is immutable, its default return value may be changed.
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 Object
clone()
boolean
containsKey(int k)
Returns true if this function contains a mapping for the specified key.int
get(int k)
Returns the value to which the given key is mapped.int
size()
Returns the intended number of keys in this function, or -1 if no such number exists.-
Methods inherited from class it.unimi.dsi.fastutil.ints.AbstractInt2IntFunction
defaultReturnValue, defaultReturnValue
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Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface it.unimi.dsi.fastutil.ints.Int2IntFunction
andThenByte, andThenChar, andThenDouble, andThenFloat, andThenInt, andThenLong, andThenObject, andThenReference, andThenShort, applyAsInt, composeByte, composeChar, composeDouble, composeFloat, composeInt, composeLong, composeObject, composeReference, composeShort, containsKey, get, put, put, remove, remove
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Methods inherited from interface java.util.function.IntUnaryOperator
andThen, compose
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Method Detail
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containsKey
public boolean containsKey(int k)
Description copied from interface:Int2IntFunction
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. In particular, this default implementation always returns true.
- Specified by:
containsKey
in interfaceInt2IntFunction
- Parameters:
k
- the key.- Returns:
- true if this function associates a value to
key
. - See Also:
Function.containsKey(Object)
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get
public int get(int k)
Description copied from interface:Int2IntFunction
Returns the value to which the given key is mapped.- Specified by:
get
in interfaceInt2IntFunction
- 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: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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clone
public Object clone()
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