Package kr.toxicity.model.api.util

Class CollectionUtil

java.lang.Object

kr.toxicity.model.api.util.CollectionUtil

@Internal
public final class CollectionUtil
extends Object

Collection util

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	CollectionUtil.FloatFunction<T>	Function of float
static interface	CollectionUtil.IndexedFunction<T,R>	Function with index

Method Summary

Modifier and Type	Method	Description
static <E, K> @NotNull @Unmodifiable Map<K,E>	associate(@NotNull Collection<E> collection, @NotNull Function<E,K> keyMapper)	Associates stream to map
static <E, K, V> @NotNull @Unmodifiable Map<K,V>	associate(@NotNull Collection<E> collection, @NotNull Function<E,K> keyMapper, @NotNull Function<E,V> valueMapper)	Associates collection to map
static <E, K> @NotNull @Unmodifiable Map<K,E>	associate(@NotNull Stream<E> stream, @NotNull Function<E,K> keyMapper)	Associates stream to map
static <E, K, V> @NotNull @Unmodifiable Map<K,V>	associate(@NotNull Stream<E> stream, @NotNull Function<E,K> keyMapper, @NotNull Function<E,V> valueMapper)	Associates stream to map
static <E, R> @NotNull Stream<R>	filterIsInstance(@NotNull Collection<E> collection, @NotNull Class<R> rClass)	Filters stream by some instance
static <E, R> @NotNull Stream<R>	filterIsInstance(@NotNull Stream<E> stream, @NotNull Class<R> rClass)	Filters stream by some instance
static <T> @NotNull Predicate<T>	filterWithWarning(@NotNull Predicate<T> predicate, @NotNull Function<T,String> lazyLogFunction)	Gets filter with warning if not matched
static <K, E> @NotNull @Unmodifiable Map<K,List<E>>	group(@NotNull Stream<E> stream, @NotNull Function<E,K> keyMapper)	Groups stream by some key
static <E, T extends it.unimi.dsi.fastutil.floats.FloatCollection> T	mapFloat(@NotNull Stream<E> stream, @NotNull CollectionUtil.FloatFunction<E> mapper, @NotNull Supplier<T> creator)	Maps some stream to a float collection
static <E, R> @NotNull Stream<R>	mapIndexed(@NotNull Collection<E> collection, @NotNull CollectionUtil.IndexedFunction<E,R> function)	Maps some collection with map index
static <K, V, R> @NotNull Stream<R>	mapIndexed(@NotNull Map<K,V> map, @NotNull CollectionUtil.IndexedFunction<Map.Entry<K,V>,R> function)	Maps some collection with map index
static <E, R> @NotNull Stream<R>	mapIndexed(@NotNull Stream<E> stream, @NotNull CollectionUtil.IndexedFunction<E,R> function)	Maps some collection with map index
static <E, R extends com.google.gson.JsonElement> @NotNull com.google.gson.JsonArray	mapToJson(int capacity, @NotNull Stream<E> stream, @NotNull Function<E,R> mapper)	Maps stream to JSON
static <E, R extends com.google.gson.JsonElement> @NotNull com.google.gson.JsonArray	mapToJson(@NotNull Collection<E> collection, @NotNull Function<E,R> mapper)	Maps stream to JSON
static <E, R> @NotNull @Unmodifiable List<R>	mapToList(@NotNull Collection<E> collection, @NotNull Function<E,R> mapper)	Maps stream to list
static <E, R> @NotNull @Unmodifiable List<R>	mapToList(@NotNull Stream<E> stream, @NotNull Function<E,R> mapper)	Maps stream to list
static <K, V, R> @NotNull @Unmodifiable Map<K,R>	mapValue(@NotNull Map<K,V> original, @NotNull Function<V,R> mapper)	Map some map's value.

Methods inherited from class java.lang.Object

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

Method Details

filterIsInstance

@NotNull
public static <E,
R> @NotNull Stream<R> filterIsInstance(@NotNull
 @NotNull Collection<E> collection,
 @NotNull
 @NotNull Class<R> rClass)

Filters stream by some instance

Type Parameters:

E - element

R - return value

Parameters:

collection - collection

rClass - class of instance

Returns:

filtered stream

mapToList

@NotNull
public static <E,
R> @NotNull @Unmodifiable List<R> mapToList(@NotNull
 @NotNull Collection<E> collection,
 @NotNull
 @NotNull Function<E,R> mapper)

Maps stream to list

Type Parameters:

E - element

R - return value

Parameters:

collection - collection

mapper - mapper

Returns:

unmodifiable list

mapToList

@NotNull
public static <E,
R> @NotNull @Unmodifiable List<R> mapToList(@NotNull
 @NotNull Stream<E> stream,
 @NotNull
 @NotNull Function<E,R> mapper)

Maps stream to list

Type Parameters:

E - element

R - return value

Parameters:

stream - stream

mapper - mapper

Returns:

unmodifiable list

mapToJson

@NotNull
public static <E,
R extends com.google.gson.JsonElement>
@NotNull com.google.gson.JsonArray mapToJson(@NotNull
 @NotNull Collection<E> collection,
 @NotNull
 @NotNull Function<E,R> mapper)

Maps stream to JSON

Type Parameters:

E - element

R - return value

Parameters:

collection - collection

mapper - mapper

Returns:

JSON array

mapToJson

@NotNull
public static <E,
R extends com.google.gson.JsonElement>
@NotNull com.google.gson.JsonArray mapToJson(int capacity,
 @NotNull
 @NotNull Stream<E> stream,
 @NotNull
 @NotNull Function<E,R> mapper)

Maps stream to JSON

Type Parameters:

E - element

R - return value

Parameters:

capacity - initial capacity

stream - stream

mapper - mapper

Returns:

JSON array

filterIsInstance

@NotNull
public static <E,
R> @NotNull Stream<R> filterIsInstance(@NotNull
 @NotNull Stream<E> stream,
 @NotNull
 @NotNull Class<R> rClass)

Filters stream by some instance

Type Parameters:

E - element

R - return value

Parameters:

stream - stream

rClass - class of instance

Returns:

filtered stream

group

@NotNull
public static <K,
E>
@NotNull @Unmodifiable Map<K,List<E>> group(@NotNull
 @NotNull Stream<E> stream,
 @NotNull
 @NotNull Function<E,K> keyMapper)

Groups stream by some key

Type Parameters:

K - key

E - element

Parameters:

stream - stream

keyMapper - key mapper

Returns:

unmodifiable grouped map

mapIndexed

@NotNull
public static <K,
V,
R> @NotNull Stream<R> mapIndexed(@NotNull
 @NotNull Map<K,V> map,
 @NotNull
 @NotNull CollectionUtil.IndexedFunction<Map.Entry<K,V>,R> function)

Maps some collection with map index

Type Parameters:

K - key

V - value

R - return value

Parameters:

map - map

function - mapper

Returns:

mapped stream

mapIndexed

@NotNull
public static <E,
R> @NotNull Stream<R> mapIndexed(@NotNull
 @NotNull Collection<E> collection,
 @NotNull
 @NotNull CollectionUtil.IndexedFunction<E,R> function)

Maps some collection with map index

Type Parameters:

E - element

R - return value

Parameters:

collection - collection

function - mapper

Returns:

mapped stream

mapIndexed

@NotNull
public static <E,
R> @NotNull Stream<R> mapIndexed(@NotNull
 @NotNull Stream<E> stream,
 @NotNull
 @NotNull CollectionUtil.IndexedFunction<E,R> function)

Maps some collection with map index

Type Parameters:

E - element

R - return value

Parameters:

stream - stream

function - mapper

Returns:

mapped stream

mapFloat

@NotNull
public static <E,
T extends it.unimi.dsi.fastutil.floats.FloatCollection>
T mapFloat(@NotNull
 @NotNull Stream<E> stream,
 @NotNull
 @NotNull CollectionUtil.FloatFunction<E> mapper,
 @NotNull
 @NotNull Supplier<T> creator)

Maps some stream to a float collection

Type Parameters:

E - element

T - type

Parameters:

stream - stream

mapper - mapper

creator - float collection creator

Returns:

float collection

mapValue

@NotNull
public static <K,
V,
R>
@NotNull @Unmodifiable Map<K,R> mapValue(@NotNull
 @NotNull Map<K,V> original,
 @NotNull
 @NotNull Function<V,R> mapper)

Map some map's value.

Type Parameters:

K - key

V - value

R - new value

Parameters:

original - original map

mapper - value mapper

Returns:

unmodifiable map

associate

@NotNull
public static <E,
K,
V>
@NotNull @Unmodifiable Map<K,V> associate(@NotNull
 @NotNull Collection<E> collection,
 @NotNull
 @NotNull Function<E,K> keyMapper,
 @NotNull
 @NotNull Function<E,V> valueMapper)

Associates collection to map

Type Parameters:

E - element

K - key

V - value

Parameters:

collection - collection

keyMapper - key mapper

valueMapper - value mapper

Returns:

unmodifiable map

filterWithWarning

@NotNull
public static <T> @NotNull Predicate<T> filterWithWarning(@NotNull
 @NotNull Predicate<T> predicate,
 @NotNull
 @NotNull Function<T,String> lazyLogFunction)

Gets filter with warning if not matched

Type Parameters:

T - type

Parameters:

predicate - delegated predicate

lazyLogFunction - log function

Returns:

predicate

associate

@NotNull
public static <E,
K>
@NotNull @Unmodifiable Map<K,E> associate(@NotNull
 @NotNull Collection<E> collection,
 @NotNull
 @NotNull Function<E,K> keyMapper)

Associates stream to map

Type Parameters:

E - element

K - key

Parameters:

collection - collection

keyMapper - key mapper

Returns:

unmodifiable map

associate

@NotNull
public static <E,
K>
@NotNull @Unmodifiable Map<K,E> associate(@NotNull
 @NotNull Stream<E> stream,
 @NotNull
 @NotNull Function<E,K> keyMapper)

Associates stream to map

Type Parameters:

E - element

K - key

Parameters:

stream - stream

keyMapper - key mapper

Returns:

unmodifiable map

associate

@NotNull
public static <E,
K,
V>
@NotNull @Unmodifiable Map<K,V> associate(@NotNull
 @NotNull Stream<E> stream,
 @NotNull
 @NotNull Function<E,K> keyMapper,
 @NotNull
 @NotNull Function<E,V> valueMapper)

Associates stream to map

Type Parameters:

E - element

K - key

V - value

Parameters:

stream - stream

keyMapper - key mapper

valueMapper - value mapper

Returns:

unmodifiable map