it.unimi.dsi.fastutil.objects
Class Object2IntFunctions.Singleton<K>

java.lang.Object
  extended by it.unimi.dsi.fastutil.objects.AbstractObject2IntFunction<K>
      extended by it.unimi.dsi.fastutil.objects.Object2IntFunctions.Singleton<K>
All Implemented Interfaces:
Function<K,java.lang.Integer>, Object2IntFunction<K>, java.io.Serializable, java.lang.Cloneable
Direct Known Subclasses:
Object2IntMaps.Singleton
Enclosing class:
Object2IntFunctions

public static class Object2IntFunctions.Singleton<K>
extends AbstractObject2IntFunction<K>
implements java.io.Serializable, java.lang.Cloneable

An immutable class representing a type-specific singleton function.

This class may be useful to implement your own in case you subclass a type-specific function.

See Also:
Serialized Form

Method Summary
 java.lang.Object clone()
           
 boolean containsKey(java.lang.Object k)
          Returns true if this function contains a mapping for the specified key.
 int getInt(java.lang.Object 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.objects.AbstractObject2IntFunction
clear, defaultReturnValue, defaultReturnValue, get, put, put, remove, removeInt
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Method Detail

containsKey

public boolean containsKey(java.lang.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.

Specified by:
containsKey in interface Function<K,java.lang.Integer>
Parameters:
k - the key.
Returns:
true if this function associates a value to key.
See Also:
Map.containsKey(Object)

getInt

public int getInt(java.lang.Object k)
Description copied from interface: Object2IntFunction
Returns the value to which the given key is mapped.

Specified by:
getInt in interface Object2IntFunction<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)

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.

Specified by:
size in interface Function<K,java.lang.Integer>
Returns:
the intended number of keys in this function, or -1 if that number is not available.

clone

public java.lang.Object clone()
Overrides:
clone in class java.lang.Object