Package it.unimi.dsi.fastutil.objects
Class Reference2ObjectFunctions.SynchronizedFunction<K,V>
- java.lang.Object
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- it.unimi.dsi.fastutil.objects.Reference2ObjectFunctions.SynchronizedFunction<K,V>
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- All Implemented Interfaces:
Function<K,V>
,Reference2ObjectFunction<K,V>
,java.io.Serializable
,java.util.function.Function<K,V>
- Direct Known Subclasses:
Reference2ObjectMaps.SynchronizedMap
- Enclosing class:
- Reference2ObjectFunctions
public static class Reference2ObjectFunctions.SynchronizedFunction<K,V> extends java.lang.Object implements Reference2ObjectFunction<K,V>, java.io.Serializable
A synchronized wrapper class for functions.- See Also:
- Serialized Form
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description V
apply(K key)
This is equivalent to callingFunction.get(Object)
.void
clear()
Removes all associations from this function (optional operation).boolean
containsKey(java.lang.Object k)
Returns true if this function contains a mapping for the specified key.V
defaultReturnValue()
Gets the default return value.void
defaultReturnValue(V defRetValue)
Sets the default return value (optional operation).boolean
equals(java.lang.Object o)
V
get(java.lang.Object k)
Returns the value to which the given key is mapped.int
hashCode()
V
put(K k, V v)
Adds a pair to the map (optional operation).V
remove(java.lang.Object k)
Removes the mapping with the given key (optional operation).int
size()
Returns the intended number of keys in this function, or -1 if no such number exists.java.lang.String
toString()
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Methods inherited from interface it.unimi.dsi.fastutil.objects.Reference2ObjectFunction
andThenByte, andThenChar, andThenDouble, andThenFloat, andThenInt, andThenLong, andThenObject, andThenReference, andThenShort, composeByte, composeChar, composeDouble, composeFloat, composeInt, composeLong, composeObject, composeReference, composeShort
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Method Detail
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apply
public V apply(K key)
Description copied from interface:Function
This is equivalent to callingFunction.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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defaultReturnValue
public V defaultReturnValue()
Description copied from interface:Reference2ObjectFunction
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 interfaceReference2ObjectFunction<K,V>
- Returns:
- the current default return value.
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defaultReturnValue
public void defaultReturnValue(V defRetValue)
Description copied from interface:Reference2ObjectFunction
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 interfaceReference2ObjectFunction<K,V>
- Parameters:
defRetValue
- the new default return value.- See Also:
Reference2ObjectFunction.defaultReturnValue()
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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. This default implementation, in particular, always return true.
- Specified by:
containsKey
in interfaceFunction<K,V>
- Parameters:
k
- the key.- Returns:
- true if this function associates a value to
key
. - See Also:
Map.containsKey(Object)
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put
public V put(K k, V v)
Description copied from interface:Reference2ObjectFunction
Adds a pair to the map (optional operation).- Specified by:
put
in interfaceFunction<K,V>
- Specified by:
put
in interfaceReference2ObjectFunction<K,V>
- Parameters:
k
- the key.v
- the value.- Returns:
- the old value, or the default return value if no value was present for the given key.
- See Also:
Function.put(Object,Object)
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get
public V get(java.lang.Object k)
Description copied from interface:Reference2ObjectFunction
Returns the value to which the given key is mapped.- Specified by:
get
in interfaceFunction<K,V>
- Specified by:
get
in interfaceReference2ObjectFunction<K,V>
- 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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remove
public V remove(java.lang.Object k)
Description copied from interface:Reference2ObjectFunction
Removes the mapping with the given key (optional operation).- Specified by:
remove
in interfaceFunction<K,V>
- Specified by:
remove
in interfaceReference2ObjectFunction<K,V>
- Parameters:
k
- the key.- Returns:
- the old value, or the default return value if no value was present for the given key.
- See Also:
Function.remove(Object)
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clear
public void clear()
Description copied from interface:Function
Removes all associations from this function (optional operation).
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hashCode
public int hashCode()
- Overrides:
hashCode
in classjava.lang.Object
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equals
public boolean equals(java.lang.Object o)
- 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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