Package it.unimi.dsi.fastutil.objects

Class Reference2IntFunctions.UnmodifiableFunction<K>

java.lang.Object

it.unimi.dsi.fastutil.objects.AbstractReference2IntFunction<K>

it.unimi.dsi.fastutil.objects.Reference2IntFunctions.UnmodifiableFunction<K>

All Implemented Interfaces:

Function<K,java.lang.Integer>, Reference2IntFunction<K>, java.io.Serializable, java.util.function.Function<K,java.lang.Integer>, java.util.function.ToIntFunction<K>

Direct Known Subclasses:

Reference2IntMaps.UnmodifiableMap

Enclosing class:

Reference2IntFunctions

public static class Reference2IntFunctions.UnmodifiableFunction<K>
extends AbstractReference2IntFunction<K>
implements java.io.Serializable

An unmodifiable wrapper class for functions.

See Also:

Serialized Form

Method Summary

Modifier and Type	Method	Description
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.
int	defaultReturnValue()	Gets the default return value.
void	defaultReturnValue(int defRetValue)	Sets the default return value (optional operation).
boolean	equals(java.lang.Object o)
java.lang.Integer	get(java.lang.Object k)	Deprecated. Please use the corresponding type-specific method instead.
int	getInt(java.lang.Object k)	Returns the value to which the given key is mapped.
int	hashCode()
int	put(K k, int v)	Adds a pair to the map (optional operation).
java.lang.Integer	put(K k, java.lang.Integer v)	Deprecated. Please use the corresponding type-specific method instead.
java.lang.Integer	remove(java.lang.Object k)	Deprecated. Please use the corresponding type-specific method instead.
int	removeInt(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()

Methods inherited from interface it.unimi.dsi.fastutil.Function

apply

Methods inherited from interface java.util.function.Function

andThen, compose

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface it.unimi.dsi.fastutil.objects.Reference2IntFunction

applyAsInt

Method Detail

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.

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.

defaultReturnValue

public int defaultReturnValue()

Description copied from interface: Reference2IntFunction

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 interface Reference2IntFunction<K>

Overrides:

defaultReturnValue in class AbstractReference2IntFunction<K>

Returns:

the current default return value.

defaultReturnValue

public void defaultReturnValue(int defRetValue)

Description copied from interface: Reference2IntFunction

Sets the default return value (optional operation). This value must be returned by type-specific versions of get(), put() and remove() to denote that the map does not contain the specified key. It must be 0/false/null by default.

Specified by:

defaultReturnValue in interface Reference2IntFunction<K>

Overrides:

defaultReturnValue in class AbstractReference2IntFunction<K>

Parameters:

defRetValue - the new default return value.

See Also:

Reference2IntFunction.defaultReturnValue()

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 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)

put

public int put(K k,
               int v)

Description copied from interface: Reference2IntFunction

Adds a pair to the map (optional operation).

Specified by:

put in interface Reference2IntFunction<K>

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)

getInt

public int getInt(java.lang.Object k)

Description copied from interface: Reference2IntFunction

Returns the value to which the given key is mapped.

Specified by:

getInt in interface Reference2IntFunction<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)

removeInt

public int removeInt(java.lang.Object k)

Description copied from interface: Reference2IntFunction

Removes the mapping with the given key (optional operation).

Specified by:

removeInt in interface Reference2IntFunction<K>

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)

clear

public void clear()

Description copied from interface: Function

Removes all associations from this function (optional operation).

Specified by:

clear in interface Function<K,java.lang.Integer>

See Also:

Map.clear()

put

@Deprecated
public java.lang.Integer put(K k,
                             java.lang.Integer v)

Deprecated.

Please use the corresponding type-specific method instead.

Associates the specified value with the specified key in this function (optional operation).

Specified by:

put in interface Function<K,java.lang.Integer>

Specified by:

put in interface Reference2IntFunction<K>

Parameters:

k - the key.

v - the value.

Returns:

the old value, or null if no value was present for the given key.

See Also:

Map.put(Object,Object)

get

@Deprecated
public java.lang.Integer get(java.lang.Object k)

Deprecated.

Please use the corresponding type-specific method instead.

Returns the value associated by this function to the specified key.

Specified by:

get in interface Function<K,java.lang.Integer>

Specified by:

get in interface Reference2IntFunction<K>

Parameters:

k - the key.

Returns:

the corresponding value, or null if no value was present for the given key.

See Also:

Map.get(Object)

remove

@Deprecated
public java.lang.Integer remove(java.lang.Object k)

Deprecated.

Please use the corresponding type-specific method instead.

Removes this key and the associated value from this function if it is present (optional operation).

Specified by:

remove in interface Function<K,java.lang.Integer>

Specified by:

remove in interface Reference2IntFunction<K>

Parameters:

k - the key.

Returns:

the old value, or null if no value was present for the given key.

See Also:

Map.remove(Object)

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object