Package org.spongepowered.api.registry

Interface Registry<T>

Type Parameters:

T - The type

@DoNotStore
public interface Registry<T>

A store of registry entries with a well defined type.

Method Summary

Modifier and Type	Method	Description
default <V extends T> Optional<RegistryEntry<V>>	findEntry(RegistryKey<T> key)	findEntry(ResourceKey), provided for convenience when using RegistryKey.
<V extends T> Optional<RegistryEntry<V>>	findEntry(ResourceKey key)	Gets the entry for a particular key, if found.
default <V extends T> Optional<V>	findValue(RegistryKey<T> key)	findValue(ResourceKey), provided for convenience when using RegistryKey.
<V extends T> Optional<V>	findValue(ResourceKey key)	Gets the value for a particular key, if found.
Optional<ResourceKey>	findValueKey(T value)	Gets the key for a particular value, if found.
boolean	isDynamic()	Returns if this registry supports adding additional values.
<V extends T> Optional<RegistryEntry<V>>	register(ResourceKey key, V value)	Registers a new value to this registry.
Stream<T>	stream()	Gets a Stream of all registry values within.
Stream<RegistryEntry<T>>	streamEntries()	Gets a Stream of all entries within.
<V extends T> Stream<V>	taggedValues(Tag<T> tag)	Returns the registered types associated with given tag.
<V extends T> Stream<Tag<V>>	tags()	Gets the tags associated with this registry.
RegistryType<T>	type()	Gets the key identifying this registry.
default <V extends T> V	value(RegistryKey<T> key)	value(ResourceKey), provided for convenience when using RegistryKey.
<V extends T> V	value(ResourceKey key)	Gets the value for a particular key.
ResourceKey	valueKey(T value)	Gets the key for a particular value.

Method Details

type

RegistryType<T> type()

Gets the key identifying this registry.

Returns:

The key

valueKey

ResourceKey valueKey(T value)

Gets the key for a particular value.

Great care needs to be made in calling this method with any uncertainty as to if the key will exist. Should the value lack a key, a IllegalStateException will be thrown. Therefore, it is advised to call findValueKey(Object) instead.

Parameters:

value - The value

Returns:

The key

findValueKey

Optional<ResourceKey> findValueKey(T value)

Gets the key for a particular value, if found.

The value must be registered within to be retrieved by key.

Parameters:

value - The value

Returns:

The key or Optional.empty()

findEntry

<V extends T> Optional<RegistryEntry<V>> findEntry(ResourceKey key)

Gets the entry for a particular key, if found.

The value must be registered within to be retrieved by key.

Parameters:

key - The key

Returns:

The entry or Optional.empty()

findEntry

default <V extends T> Optional<RegistryEntry<V>> findEntry(RegistryKey<T> key)

findEntry(ResourceKey), provided for convenience when using RegistryKey.

Parameters:

key - The key

Returns:

The entry or Optional.empty()

findValue

<V extends T> Optional<V> findValue(ResourceKey key)

Gets the value for a particular key, if found.

Parameters:

key - The key

Returns:

The value or Optional.empty()

findValue

default <V extends T> Optional<V> findValue(RegistryKey<T> key)

findValue(ResourceKey), provided for convenience when using RegistryKey.

Parameters:

key - The key

Returns:

The value or Optional.empty()

value

<V extends T> V value(ResourceKey key)

Gets the value for a particular key.

Great care needs to be made in calling this method with any uncertainty as to if the key will exist. Should this key lack a value, a ValueNotFoundException will be thrown. Therefore, it is advised to call findValue(ResourceKey) or findValue(RegistryKey) instead.

Parameters:

key - The key

Returns:

The value

taggedValues

<V extends T> Stream<V> taggedValues(Tag<T> tag)

Returns the registered types associated with given tag.

Parameters:

tag - The tag

Returns:

The registered types associated with given tag

tags

<V extends T> Stream<Tag<V>> tags()

Gets the tags associated with this registry.

Returns:

The tags associated with this registry

value

default <V extends T> V value(RegistryKey<T> key)

value(ResourceKey), provided for convenience when using RegistryKey.

Parameters:

key - The key

Returns:

The value

streamEntries

Stream<RegistryEntry<T>> streamEntries()

Gets a Stream of all entries within.

Returns:

The stream

stream

Stream<T> stream()

Gets a Stream of all registry values within.

Returns:

The stream

isDynamic

boolean isDynamic()

Returns if this registry supports adding additional values.

Returns:

True if the registry can add additional values

register

<V extends T> Optional<RegistryEntry<V>> register(ResourceKey key,
 V value)

Registers a new value to this registry.

If this registry is not dynamic or the provided key is already registered, Optional.empty() is returned instead.

Parameters:

key - The key

value - The value

Returns:

The newly added entry, Optional.empty() otherwise