Package net.minecraftforge.registries.tags

Interface ITagManager<V>

All Superinterfaces:

Iterable<ITag<V>>

All Known Implementing Classes:

ForgeRegistryTagManager

public interface ITagManager<V>
extends Iterable<ITag<V>>

A tag manager holds information about all tags currently bound to a forge registry. This should be preferred to any Holder-related methods.

Method Summary

Modifier and Type	Method	Description
void	addOptionalTagDefaults(@NotNull TagKey<V> name, @NotNull Set<? extends Supplier<V>> defaults)	Adds defaults to an existing tag key.
@NotNull TagKey<V>	createOptionalTagKey(@NotNull ResourceLocation location, @NotNull Set<? extends Supplier<V>> defaults)	Creates a tag key that will use the set of defaults if the tag is not loaded from any datapacks.
@NotNull TagKey<V>	createTagKey(@NotNull ResourceLocation location)	Creates a tag key based on the location and the forge registry linked to this tag manager.
@NotNull Optional<IReverseTag<V>>	getReverseTag(V value)	Queries a reverse tag for a given value from the forge registry linked to this tag manager.
@NotNull ITag<V>	getTag(@NotNull TagKey<V> name)	Queries this tag manager for a tag with the given tag key.
@NotNull Stream<TagKey<V>>	getTagNames()
boolean	isKnownTagName(@NotNull TagKey<V> name)	Checks whether the given tag key exists in this tag manager and is bound.
@NotNull Stream<ITag<V>>	stream()

Methods inherited from interface java.lang.Iterable

forEach, iterator, spliterator

Method Details

getTag

@NotNull
@NotNull ITag<V> getTag(@NotNull
 @NotNull TagKey<V> name)

Queries this tag manager for a tag with the given tag key. If it does not exist, this will create an empty tag and return it.

See Also:

• isKnownTagName(TagKey)

getReverseTag

@NotNull
@NotNull Optional<IReverseTag<V>> getReverseTag(@NotNull
 V value)

Queries a reverse tag for a given value from the forge registry linked to this tag manager. A reverse tag stores all tags that the given value is contained in.

Parameters:

value - A value currently registered to the forge registry linked to this tag manager

Returns:

A reverse tag for the given value, or an empty optional if the value is not registered

isKnownTagName

boolean isKnownTagName(@NotNull
 @NotNull TagKey<V> name)

Checks whether the given tag key exists in this tag manager and is bound. Unlike getTag(TagKey), this method will not create the tag if it does not exist.

See Also:

• ITag.isBound()

stream

@NotNull
@NotNull Stream<ITag<V>> stream()

Returns:

A stream of all tags stored in this tag manager, bound or unbound.

getTagNames

@NotNull
@NotNull Stream<TagKey<V>> getTagNames()

Returns:

A stream of all tag keys stored in this tag manager, bound or unbound.

createTagKey

@NotNull
@NotNull TagKey<V> createTagKey(@NotNull
 @NotNull ResourceLocation location)

Creates a tag key based on the location and the forge registry linked to this tag manager. Custom registries can use DeferredRegister.createTagKey(ResourceLocation) to create tag keys before the tag manager is created.

See Also:

• createOptionalTagKey(ResourceLocation, Set)
• DeferredRegister.createTagKey(ResourceLocation)

createOptionalTagKey

@NotNull
@NotNull TagKey<V> createOptionalTagKey(@NotNull
 @NotNull ResourceLocation location,
 @NotNull
 @NotNull Set<? extends Supplier<V>> defaults)

Creates a tag key that will use the set of defaults if the tag is not loaded from any datapacks. Useful on the client side when a server may not provide a specific tag. Custom registries can use DeferredRegister.addOptionalTagDefaults(TagKey, Set) to create tag keys before the tag manager is created.

See Also:

• createTagKey(ResourceLocation)
• addOptionalTagDefaults(TagKey, Set)
• DeferredRegister.createOptionalTagKey(ResourceLocation, Set)

addOptionalTagDefaults

void addOptionalTagDefaults(@NotNull
 @NotNull TagKey<V> name,
 @NotNull
 @NotNull Set<? extends Supplier<V>> defaults)

Adds defaults to an existing tag key. The set of defaults will be bound to the tag if the tag is not loaded from any datapacks. Useful on the client side when a server may not provide a specific tag. Custom registries can use DeferredRegister.addOptionalTagDefaults(TagKey, Set) to add defaults before the tag manager is created.

See Also:

• createOptionalTagKey(ResourceLocation, Set)
• DeferredRegister.addOptionalTagDefaults(TagKey, Set)