it.unimi.dsi.fastutil.doubles
Class Double2ReferenceFunctions.UnmodifiableFunction<V>

java.lang.Object
  it.unimi.dsi.fastutil.doubles.AbstractDouble2ReferenceFunction<V>
      it.unimi.dsi.fastutil.doubles.Double2ReferenceFunctions.UnmodifiableFunction<V>

All Implemented Interfaces:

Double2ReferenceFunction<V>, Function<Double,V>, Serializable

Direct Known Subclasses:

Double2ReferenceMaps.UnmodifiableMap

Enclosing class:

Double2ReferenceFunctions

public static class Double2ReferenceFunctions.UnmodifiableFunction<V>
extends AbstractDouble2ReferenceFunction<V>
implements Serializable

An unmodifiable wrapper class for functions.

See Also:

Serialized Form

Field Summary

static long

serialVersionUID

Method Summary

void	clear() Removes all associations from this function (optional operation).
boolean	containsKey(double k)
boolean	containsKey(Object ok) 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.
V	get(double k) Returns the value to which the given key is mapped.
V	get(Object k) Delegates to the corresponding type-specific method, taking care of returning null on a missing key.
V	put(double k, V v) Adds a pair to the map.
V	remove(double k) Removes the mapping with the given key.
V	remove(Object k) Delegates to the corresponding type-specific method, taking care of returning null on a missing key.
int	size() Returns the intended number of keys in this function, or -1 if no such number exists.
String	toString()

Methods inherited from class it.unimi.dsi.fastutil.doubles.AbstractDouble2ReferenceFunction

put

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

serialVersionUID

public static final long serialVersionUID

See Also:

Constant Field Values

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.

Specified by:

size in interface Function<Double,V>

Returns:

the intended number of keys in this function, or -1 if that number is not available.

containsKey

public boolean containsKey(double k)

Specified by:

containsKey in interface Double2ReferenceFunction<V>

See Also:

Function.containsKey(Object)

defaultReturnValue

public V defaultReturnValue()

Description copied from interface: Double2ReferenceFunction

Gets the default return value.

Specified by:

defaultReturnValue in interface Double2ReferenceFunction<V>

Overrides:

defaultReturnValue in class AbstractDouble2ReferenceFunction<V>

Returns:

the current default return value.

defaultReturnValue

public void defaultReturnValue(V defRetValue)

Description copied from interface: Double2ReferenceFunction

Sets the default return value. 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 Double2ReferenceFunction<V>

Overrides:

defaultReturnValue in class AbstractDouble2ReferenceFunction<V>

Parameters:

defRetValue - the new default return value.

See Also:

Double2ReferenceFunction.defaultReturnValue()

put

public V put(double k,
             V v)

Description copied from interface: Double2ReferenceFunction

Adds a pair to the map.

Specified by:

put in interface Double2ReferenceFunction<V>

Overrides:

put in class AbstractDouble2ReferenceFunction<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)

clear

public void clear()

Description copied from interface: Function

Removes all associations from this function (optional operation).

Specified by:

clear in interface Function<Double,V>

Overrides:

clear in class AbstractDouble2ReferenceFunction<V>

See Also:

Map.clear()

toString

public String toString()

Overrides:

toString in class Object

remove

public V remove(double k)

Description copied from interface: Double2ReferenceFunction

Removes the mapping with the given key.

Specified by:

remove in interface Double2ReferenceFunction<V>

Overrides:

remove in class AbstractDouble2ReferenceFunction<V>

Returns:

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

See Also:

Function.remove(Object)

get

public V get(double k)

Description copied from interface: Double2ReferenceFunction

Returns the value to which the given key is mapped.

Specified by:

get in interface Double2ReferenceFunction<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)

containsKey

public boolean containsKey(Object ok)

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<Double,V>

Overrides:

containsKey in class AbstractDouble2ReferenceFunction<V>

Parameters:

ok - the key.

Returns:

true if this function associates a value to key.

See Also:

Map.containsKey(Object)

remove

public V remove(Object k)

Description copied from class: AbstractDouble2ReferenceFunction

Delegates to the corresponding type-specific method, taking care of returning null on a missing key.

This method must check whether the provided key is in the map using containsKey(). Thus, it probes the map twice. Implementors of subclasses should override it with a more efficient method.

Specified by:

remove in interface Function<Double,V>

Overrides:

remove in class AbstractDouble2ReferenceFunction<V>

Returns:

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

See Also:

Map.remove(Object)

get

public V get(Object k)

Description copied from class: AbstractDouble2ReferenceFunction

Delegates to the corresponding type-specific method, taking care of returning null on a missing key.

This method must check whether the provided key is in the map using containsKey(). Thus, it probes the map twice. Implementors of subclasses should override it with a more efficient method.

Specified by:

get in interface Function<Double,V>

Overrides:

get in class AbstractDouble2ReferenceFunction<V>

Parameters:

k - the key.

Returns:

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

See Also:

Map.get(Object)