Package org.geysermc.geyser.item.hashing

Class MapHasher<Type>

java.lang.Object

org.geysermc.geyser.item.hashing.MapHasher<Type>

Type Parameters:

Type - the type this MapHasher encodes.

public class MapHasher<Type>
extends Object

MapHashers are used to encode a MapHasher to a map-like structure, which is then hashed using a MinecraftHashEncoder.

MapHashers store the MapHasher they are encoding, but it isn't directly accessible. Instead, extractor functions are used to extract specific properties of the MapHasher.

Method Summary

Modifier and Type	Method	Description
<Value> MapHasher<Type>	accept(String key, MinecraftHasher<Value> hasher, Function<Type,Value> extractor)	Extracts a MapHasher from a MapHasher using the extractor, and adds it to the map.
<Value> MapHasher<Type>	accept(Function<Type,Value> extractor, Function<Value,MapBuilder<Type>> builderDispatcher)	Extracts a MapHasher from a MapHasher using the extractor, then dispatches a MapBuilder from the MapHasher using the builderDispatcher, and applies it to this MapHasher, essentially adding the keys it defines here.
MapHasher<Type>	accept(MapBuilder<Type> builder)	Applies the MapBuilder to this MapHasher, essentially adding all the keys it defines here.
<Value> MapHasher<Type>	accept(MapBuilder<Value> builder, Function<Type,Value> extractor)	Extracts a MapHasher from a MapHasher using the extractor, and applies the given MapBuilder for it to this MapHasher, essentially adding the keys it defines here.
<Value> MapHasher<Type>	acceptConstant(String key, MinecraftHasher<Value> hasher, Value value)	Adds a constant MapHasher to the map.
<Value> MapHasher<Type>	acceptList(String key, MinecraftHasher<Value> valueHasher, Function<Type,List<Value>> extractor)	Extracts a list of MapHashers from a MapHasher, and adds it to the map.
com.google.common.hash.HashCode	build()
<Value> MapHasher<Type>	optional(String key, MinecraftHasher<Value> hasher, Function<Type,Optional<Value>> extractor)	Extracts an Optional of a MapHasher from a MapHasher using the extractor, and adds it to the map if it is present.
<Value> MapHasher<Type>	optional(String key, MinecraftHasher<Value> hasher, Function<Type,Value> extractor, Value defaultValue)	Extracts a MapHasher from a MapHasher using the extractor, and adds it to the map if it's not equal to defaultValue.
<Value> MapHasher<Type>	optionalList(String key, MinecraftHasher<Value> valueHasher, Function<Type,List<Value>> extractor)	Extracts a list of MapHashers from a MapHasher, and adds it to the map if it is not empty.
<Value> MapHasher<Type>	optionalNullable(String key, MinecraftHasher<Value> hasher, Function<Type,Value> extractor)	Extracts a MapHasher from a MapHasher using the extractor, and adds it to the map if it is not null.
<Value> MapHasher<Type>	optionalPredicate(String key, MinecraftHasher<Value> hasher, Function<Type,Value> extractor, Predicate<Value> predicate)	Extracts a MapHasher from a MapHasher using the extractor, and adds it to the map only if predicate returns true for it.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

acceptConstant

public <Value> MapHasher<Type> acceptConstant(String key,
 MinecraftHasher<Value> hasher,
 Value value)

Adds a constant MapHasher to the map.

Type Parameters:

Value - the type of the value.

Parameters:

key - the key to put the constant in.

hasher - the hasher used to hash a MapHasher.

value - the MapHasher.

accept

public <Value> MapHasher<Type> accept(String key,
 MinecraftHasher<Value> hasher,
 Function<Type,Value> extractor)

Extracts a MapHasher from a MapHasher using the extractor, and adds it to the map.

Type Parameters:

Value - the type of the value.

Parameters:

key - the key to put the MapHasher in.

hasher - the hasher used to hash a MapHasher.

extractor - the function that extracts a MapHasher from a MapHasher.

accept

public MapHasher<Type> accept(MapBuilder<Type> builder)

Applies the MapBuilder to this MapHasher, essentially adding all the keys it defines here.

accept

public <Value> MapHasher<Type> accept(MapBuilder<Value> builder,
 Function<Type,Value> extractor)

Extracts a MapHasher from a MapHasher using the extractor, and applies the given MapBuilder for it to this MapHasher, essentially adding the keys it defines here.

Type Parameters:

Value - the type of the value.

Parameters:

builder - the MapBuilder that encodes a MapHasher.

extractor - the function that extracts a MapHasher from a MapHasher.

accept

public <Value> MapHasher<Type> accept(Function<Type,Value> extractor,
 Function<Value,MapBuilder<Type>> builderDispatcher)

Extracts a MapHasher from a MapHasher using the extractor, then dispatches a MapBuilder from the MapHasher using the builderDispatcher, and applies it to this MapHasher, essentially adding the keys it defines here.

Type Parameters:

Value - the type of the value.

Parameters:

extractor - the function that extracts a MapHasher from a MapHasher.

builderDispatcher - the function that dispatches a MapBuilder from a MapHasher.

optionalNullable

public <Value> MapHasher<Type> optionalNullable(String key,
 MinecraftHasher<Value> hasher,
 Function<Type,Value> extractor)

Extracts a MapHasher from a MapHasher using the extractor, and adds it to the map if it is not null.

Type Parameters:

Value - the type of the value.

Parameters:

key - the key to put the MapHasher in.

hasher - the hasher used to hash a MapHasher.

extractor - the function that extracts a MapHasher from a MapHasher.

optional

public <Value> MapHasher<Type> optional(String key,
 MinecraftHasher<Value> hasher,
 Function<Type,Optional<Value>> extractor)

Extracts an Optional of a MapHasher from a MapHasher using the extractor, and adds it to the map if it is present.

Type Parameters:

Value - the type of the value.

Parameters:

key - the key to put the MapHasher in.

hasher - the hasher used to hash a MapHasher.

extractor - the function that extracts a MapHasher from a MapHasher.

optional

public <Value> MapHasher<Type> optional(String key,
 MinecraftHasher<Value> hasher,
 Function<Type,Value> extractor,
 Value defaultValue)

Extracts a MapHasher from a MapHasher using the extractor, and adds it to the map if it's not equal to defaultValue.

Type Parameters:

Value - the type of the value.

Parameters:

key - the key to put the MapHasher in.

hasher - the hasher used to hash a MapHasher.

extractor - the function that extracts a MapHasher from a MapHasher.

defaultValue - the default MapHasher. The MapHasher won't be added to the map if it equals the default.

optionalPredicate

public <Value> MapHasher<Type> optionalPredicate(String key,
 MinecraftHasher<Value> hasher,
 Function<Type,Value> extractor,
 Predicate<Value> predicate)

Extracts a MapHasher from a MapHasher using the extractor, and adds it to the map only if predicate returns true for it.

Type Parameters:

Value - the type of the value.

Parameters:

key - the key to put the MapHasher in.

hasher - the hasher used to hash a MapHasher.

extractor - the function that extracts a MapHasher from a MapHasher.

predicate - the predicate that checks if a MapHasher should be added to the map. The MapHasher won't be added to the map if the predicate returns false for it.

acceptList

public <Value> MapHasher<Type> acceptList(String key,
 MinecraftHasher<Value> valueHasher,
 Function<Type,List<Value>> extractor)

Extracts a list of MapHashers from a MapHasher, and adds it to the map.

Type Parameters:

Value - the type of the value.

Parameters:

key - the key to put the list of MapHashers in.

valueHasher - the hasher used to hash a single MapHasher.

extractor - the function that extracts a list of MapHashers from a MapHasher.

optionalList

public <Value> MapHasher<Type> optionalList(String key,
 MinecraftHasher<Value> valueHasher,
 Function<Type,List<Value>> extractor)

Extracts a list of MapHashers from a MapHasher, and adds it to the map if it is not empty.

Type Parameters:

Value - the type of the value.

Parameters:

key - the key to put the list of MapHashers in.

valueHasher - the hasher used to hash a single MapHasher.

extractor - the function that extracts a list of MapHashers from a MapHasher.

build

public com.google.common.hash.HashCode build()