Package org.spongepowered.api.data.value

Interface ValueContainer

All Known Subinterfaces:

Aerial, Ageable, Agent, Ambient, Animal, Aquatic, Archetype<S,E>, AreaEffectCloud, ArmorStand, Arrow, ArrowEntity, Banner, Barrel, Bat, Beacon, Bed, Bee, Beehive, Bell, BlastFurnace, Blaze, BlockEntity, BlockEntityArchetype, BlockEntityInventory<T>, BlockOccupiedMinecart, BlockSnapshot, BlockState, BlockType, Boat, Boss, BrewingStand, Campfire, CarriedInventory<C>, CarrierBlockEntity, CarrierMinecart<M>, Cat, CaveSpider, Chest, ChestMinecart, Chicken, ClientPlayer, Cod, CommandBlock, CommandBlockMinecart, Comparator, ComplexLiving<T>, ComplexLivingPart<P>, Conduit, Container, CopyableDataHolder, CopyableValueContainer, Cow, CraftingGridInventory, CraftingInventory, CraftingOutput, Creature, Creeper, DamagingProjectile, DataHolder, DataHolder.Immutable<I>, DataHolder.Mutable, DataManipulator, DataManipulator.Immutable, DataManipulator.Mutable, DaylightDetector, DirectionRelativeDataHolder, DirectionRelativeDataHolder.Immutable<I>, DirectionRelativeDataHolder.Mutable, Dispenser, Dolphin, Donkey, DragonFireball, Dropper, Drowned, Egg, ElderGuardian, EmptyInventory, EnchantmentTable, EndCrystal, EnderChest, EnderDragon, EnderDragonPart, Enderman, Endermite, EnderPearl, EndGateway, EndPortal, Entity, EntityArchetype, EntitySnapshot, EntityTargetingProjectile, EquipmentInventory, EquipmentSlot, Evoker, EvokerFangs, ExperienceBottle, ExperienceOrb, Explosive, ExplosiveFireball, EyeOfEnder, FallingBlock, FilteringSlot, FireballEntity, FireworkRocket, Fish, FishingBobber, FluidStack, FluidStackSnapshot, FluidState, FluidType, Fox, FuelSlot, Furnace, FurnaceBlockEntity, FurnaceMinecart, FusedExplosive, Ghast, Giant, Golem, GridInventory, Guardian, Hanging, Hoglin, Hopper, HopperMinecart, Horse, HorseLike, Hostile, Hotbar, Human, Humanoid, Husk, Illager, Illusioner, InputSlot, Inventory, Inventory2D, InventoryColumn, InventoryRow, IronGolem, Item, ItemFrame, ItemStack, ItemStackSnapshot, ItemType, Jigsaw, Jukebox, LeashKnot, Lectern, LightningBolt, Living, Llama, LlamaLike, LlamaSpit, LocalPlayer, LocatableBlock, LocatableSnapshot<T>, MagmaCube, MapInfo, Merchant, Minecart, MinecartLike, MobSpawner, Monster, Mooshroom, Mule, NameableBlockEntity, NameableCarrierBlockEntity, Ocelot, OutputSlot, PackHorse, Painting, Panda, Parrot, Patroller, PersistentInventory, Phantom, Pig, Piglin, PiglinBrute, PiglinLike, Pillager, Piston, Player, PlayerInventory, PolarBear, Potion, PrimaryPlayerInventory, PrimedTNT, Projectile, Pufferfish, Rabbit, Raider, Ranger, Ravager, RemotePlayer, Salmon, SchoolingFish, SerializableDataHolder, SerializableDataHolder.Immutable<I>, SerializableDataHolder.Mutable, ServerLocation, ServerPlayer, Sheep, Shulker, ShulkerBox, ShulkerBullet, SidedSlot, Sign, Silverfish, Sittable, Skeleton, SkeletonHorse, SkeletonLike, Skull, Slime, Slot, SmallFireball, Smoker, Snowball, SnowGolem, Spawner, SpawnerMinecart, SpectralArrow, Spellcaster, Spider, Squid, State<S>, Stray, Strider, StructureBlock, TameableAnimal, TameableHorse, TNTMinecart, Trader, TraderLlama, TrappedChest, Trident, TropicalFish, Turtle, User, UserInventory, Vehicle, Vex, ViewableInventory, Villager, Vindicator, WanderingTrader, WeatherEffect, Witch, Wither, WitherSkeleton, WitherSkull, Wolf, Zoglin, Zombie, ZombieHorse, ZombieLike, ZombieVillager, ZombifiedPiglin

public interface ValueContainer

A value holder is a holder of a particular set of Values. While there exists a DataHolder and DataManipulator, the emphasis of ValueContainer is that it only contains "data". It is not known whether a ValueHolder is mutable or immutable.

Being that a ValueHolder is literally a container of Values, it itself does not contain the underlying values of data. A ValueContainer may not always be parented by another ValueContainer, such as the case for DataManipulators and DataHolder.Mutables, it is recommended to knowingly understand the fundamental differences between them.

Method Summary

Modifier and Type	Method	Description
<E> Optional<E>	get(Key<? extends Value<E>> key)	Attempts to get the underlying value backed by a Value linked to the provided Key.
default OptionalDouble	getDouble(Key<? extends Value<Double>> key)	Attempts to get the underlying double value backed by a Value linked to the provided Key.
default OptionalInt	getInt(Key<? extends Value<Integer>> key)	Attempts to get the underlying int value backed by a Value linked to the provided Key.
Set<Key<?>>	getKeys()	Gets all applicable Keys for this ValueContainer.
default OptionalLong	getLong(Key<? extends Value<Long>> key)	Attempts to get the underlying long value backed by a Value linked to the provided Key.
default <E> E	getOrElse(Key<? extends Value<E>> key, E defaultValue)	Attempts to get the underlying value if available.
default <E> @Nullable E	getOrNull(Key<? extends Value<E>> key)	Attempts to get the underlying value if available and supported.
<E,V extends Value<E>> Optional<V>	getValue(Key<V> key)	Gets the Value for the given Key.
Set<Value.Immutable<?>>	getValues()	Gets all applicable Values associated with this ValueContainer.
default <E> E	require(Key<? extends Value<E>> key)	Attempts to get the underlying value backed by a Value linked to the provided Key.
default <E,V extends Value<E>> V	requireValue(Key<V> key)	Attempts to get the underlying value backed by a Value linked to the provided Key.
boolean	supports(Key<?> key)	Checks if the given Key is supported by this ValueContainer.
default boolean	supports(Value<?> value)	Checks if the provided Value is supported.

Method Detail

get

<E> Optional<E> get(Key<? extends Value<E>> key)

Attempts to get the underlying value backed by a Value linked to the provided Key. If the Key is not supported, Optional.empty() is returned. It is important to check for support of a Key by either calling supports(Value) or supports(Key).

Type Parameters:

E - The type of value

Parameters:

key - The key to retrieve the value for

Returns:

The value, if available

getInt

default OptionalInt getInt(Key<? extends Value<Integer>> key)

Attempts to get the underlying int value backed by a Value linked to the provided Key. If the Key is not supported, Optional.empty() is returned. It is important to check for support of a Key by either calling supports(Value) or supports(Key).

Parameters:

key - The key to retrieve the value for

Returns:

The value, if available

getDouble

default OptionalDouble getDouble(Key<? extends Value<Double>> key)

Attempts to get the underlying double value backed by a Value linked to the provided Key. If the Key is not supported, Optional.empty() is returned. It is important to check for support of a Key by either calling supports(Value) or supports(Key).

Parameters:

key - The key to retrieve the value for

Returns:

The value, if available

getLong

default OptionalLong getLong(Key<? extends Value<Long>> key)

Attempts to get the underlying long value backed by a Value linked to the provided Key. If the Key is not supported, Optional.empty() is returned. It is important to check for support of a Key by either calling supports(Value) or supports(Key).

Parameters:

key - The key to retrieve the value for

Returns:

The value, if available

require

default <E> E require(Key<? extends Value<E>> key)

Attempts to get the underlying value backed by a Value linked to the provided Key.

If the Key is not supported or available, NoSuchElementException will be thrown.

Type Parameters:

E - The type of value

Parameters:

key - The key

Returns:

The value

Throws:

NoSuchElementException - If the value is not supported or present

getOrNull

default <E> @Nullable E getOrNull(Key<? extends Value<E>> key)

Attempts to get the underlying value if available and supported. If the Value is not supported whatsoever by this ValueContainer, an exception is thrown.

Type Parameters:

E - The type of value

Parameters:

key - The Key backing the Value

Returns:

The value, or null if not set

getOrElse

default <E> E getOrElse(Key<? extends Value<E>> key,
                        E defaultValue)

Attempts to get the underlying value if available. If the value is not set, the given defaultValue is returned, if the Value is even supported.

Type Parameters:

E - The type of value

Parameters:

key - The key backing the Value

defaultValue - The value to default to if not set

Returns:

The value, or default if not set

getValue

<E,V extends Value<E>> Optional<V> getValue(Key<V> key)

Gets the Value for the given Key.

Type Parameters:

E - The type of the return type

V - The type of value

Parameters:

key - The key linked to the Value

Returns:

The value, if available

requireValue

default <E,V extends Value<E>> V requireValue(Key<V> key)

Attempts to get the underlying value backed by a Value linked to the provided Key.

If the Key is not supported or available, NoSuchElementException will be thrown.

Type Parameters:

E - The type of element wrapped by the value

V - The type of value

Parameters:

key - The key

Returns:

The value

Throws:

NoSuchElementException - If the value is not supported or present

supports

boolean supports(Key<?> key)

Checks if the given Key is supported by this ValueContainer.

Parameters:

key - The key to check

Returns:

True if the key and value backed by the key is supported

supports

default boolean supports(Value<?> value)

Checks if the provided Value is supported.

Parameters:

value - The base value to check

Returns:

True if the base value is supported

getKeys

Set<Key<?>> getKeys()

Gets all applicable Keys for this ValueContainer. Changes can not be made to the set to alter the ValueContainer, nor can the Values be changed with the provided ImmutableSet.

Returns:

An immutable set of known Keys

getValues

Set<Value.Immutable<?>> getValues()

Gets all applicable Values associated with this ValueContainer. As the data backed by the values are copied, any modifications to the Values will not be reflected onto this ValueContainer.

Returns:

An immutable set of copied values