io.micronaut.core.value

Interface OptionalValues<V>

Type Parameters:

V - The generic value

All Superinterfaces:

Iterable<CharSequence>

All Known Subinterfaces:

OptionalMultiValues<V>

All Known Implementing Classes:

OptionalValuesMap

public interface OptionalValues<V>
extends Iterable<CharSequence>

A simple type safe abstraction over a map of optional values.

Since:

1.0

Author:

Graeme Rocher

Field Summary

Fields

Modifier and Type	Field and Description
static OptionalValues	EMPTY_VALUES Constant for empty values.

Method Summary

Modifier and Type	Method and Description
static <T> OptionalValues<T>	empty() An empty OptionalValues.
default void	forEach(BiConsumer<CharSequence,? super V> action) Performs the given action for each entry in this OptionalValues until all entries have been processed or the action throws an exception.
Optional<V>	get(CharSequence name) Retrieve a value if it is present.
default boolean	isEmpty()
static <T> OptionalValues<T>	of(Class<T> type, Map<CharSequence,?> values) Creates a new OptionalValues for the given type and values.
Collection<V>	values()

Methods inherited from interface java.lang.Iterable

forEach, iterator, spliterator

Field Detail

EMPTY_VALUES

static final OptionalValues EMPTY_VALUES

Constant for empty values.

Method Detail

get

Optional<V> get(CharSequence name)

Retrieve a value if it is present.

Parameters:

name - The name of the value

Returns:

An Optional of the value

values

Collection<V> values()

Returns:

The values

isEmpty

default boolean isEmpty()

Returns:

Whether the OptionalValues is empty

forEach

default void forEach(BiConsumer<CharSequence,? super V> action)

Performs the given action for each entry in this OptionalValues until all entries have been processed or the action throws an exception. Unless otherwise specified by the implementing class, actions are performed in the order of entry set iteration (if an iteration order is specified.) Exceptions thrown by the action are relayed to the caller.

Parameters:

action - The action to be performed for each entry

Throws:

NullPointerException - if the specified action is null removed during iteration

empty

static <T> OptionalValues<T> empty()

An empty OptionalValues.

Type Parameters:

T - The generic type

Returns:

The empty values

of

static <T> OptionalValues<T> of(Class<T> type,
                                @Nullable
                                Map<CharSequence,?> values)

Creates a new OptionalValues for the given type and values.

Type Parameters:

T - The target generic type

Parameters:

type - The target type

values - A map of values

Returns:

The values