Package io.lettuce.core

Class ScoredValue<V>

java.lang.Object

io.lettuce.core.Value<V>

io.lettuce.core.ScoredValue<V>

Type Parameters:

V - Value type.

All Implemented Interfaces:

Serializable

public class ScoredValue<V>
extends Value<V>

A scored-value extension to Value.

Author:

Will Glozer, Mark Paluch

See Also:

Serialized Form

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ScoredValue()	Serializable constructor.

Method Summary

Modifier and Type	Method	Description
static <V> ScoredValue<V>	empty()	Returns an empty ScoredValue instance.
boolean	equals(Object o)
static <T extends V,V> Value<V>	from(double score, Optional<T> optional)	Creates a Value from a key and an Optional.
static <T extends V,V> Value<V>	fromNullable(double score, T value)	Creates a Value from a score and value.
double	getScore()
int	hashCode()
static <T extends V,V> ScoredValue<V>	just(double score, T value)	Creates a ScoredValue from a key and value.
<R> ScoredValue<R>	map(Function<? super V,? extends R> mapper)	Returns a ScoredValue consisting of the results of applying the given function to the value of this element.
ScoredValue<V>	mapScore(Function<? super Number,? extends Number> mapper)	Returns a ScoredValue consisting of the results of applying the given function to the score of this element.
String	toString()

Methods inherited from class io.lettuce.core.Value

from, fromNullable, getValue, getValueOrElse, getValueOrElseGet, getValueOrElseThrow, hasValue, ifEmpty, ifHasValue, ifHasValueOrElse, isEmpty, just, optional, stream

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ScoredValue

protected ScoredValue()

Serializable constructor.

Method Detail

from

public static <T extends V,V> Value<V> from(double score,
                                                  Optional<T> optional)

Creates a Value from a key and an Optional. The resulting value contains the value from the Optional if a value is present. Value is empty if the Optional is empty.

Parameters:

score - the score.

optional - the optional. May be empty but never null.

Returns:

the Value.

fromNullable

public static <T extends V,V> Value<V> fromNullable(double score,
                                                          T value)

Creates a Value from a score and value. The resulting value contains the value if the value is not null.

Parameters:

score - the score.

value - the value. May be null.

Returns:

the Value.

empty

public static <V> ScoredValue<V> empty()

Returns an empty ScoredValue instance. No value is present for this instance.

Returns:

the ScoredValue

just

public static <T extends V,V> ScoredValue<V> just(double score,
                                                        T value)

Creates a ScoredValue from a key and value. The resulting value contains the value.

Parameters:

score - the score.

value - the value. Must not be null.

Returns:

the ScoredValue.

getScore

public double getScore()

equals

public boolean equals(Object o)

Overrides:

equals in class Value<V>

hashCode

public int hashCode()

Overrides:

hashCode in class Value<V>

toString

public String toString()

Overrides:

toString in class Value<V>

map

public <R> ScoredValue<R> map(Function<? super V,? extends R> mapper)

Returns a ScoredValue consisting of the results of applying the given function to the value of this element. Mapping is performed only if a value is present.

Overrides:

map in class Value<V>

Type Parameters:

R - element type of the new ScoredValue.

Parameters:

mapper - a stateless function to apply to each element.

Returns:

the new ScoredValue.

mapScore

public ScoredValue<V> mapScore(Function<? super Number,? extends Number> mapper)

Returns a ScoredValue consisting of the results of applying the given function to the score of this element. Mapping is performed only if a value is present.

Parameters:

mapper - a stateless function to apply to each element.

Returns:

the new ScoredValue .