Package io.vavr.collection

Class LinkedHashMultimap<K,V>

java.lang.Object

io.vavr.collection.AbstractMultimap<K,V,LinkedHashMultimap<K,V>>

io.vavr.collection.LinkedHashMultimap<K,V>

Type Parameters:

K - Key type

V - Value type

All Implemented Interfaces:

Foldable<Tuple2<K,V>>, Multimap<K,V>, Traversable<Tuple2<K,V>>, Function1<K,Traversable<V>>, PartialFunction<K,Traversable<V>>, Value<Tuple2<K,V>>, Serializable, Iterable<Tuple2<K,V>>, Function<K,Traversable<V>>

public final class LinkedHashMultimap<K,V>
extends AbstractMultimap<K,V,LinkedHashMultimap<K,V>>
implements Serializable

A LinkedHashMap-based implementation of Multimap

See Also:

• Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	LinkedHashMultimap.Builder<V>	Builder class for creating LinkedHashMultimap instances.

Nested classes/interfaces inherited from class io.vavr.collection.AbstractMultimap

AbstractMultimap.SerializableSupplier<T>

Nested classes/interfaces inherited from interface io.vavr.collection.Multimap

Multimap.ContainerType

Field Summary

Fields

Modifier and Type	Field	Description
private static final long	serialVersionUID

Fields inherited from class io.vavr.collection.AbstractMultimap

back, emptyContainer

Constructor Summary

Constructors

Modifier	Constructor	Description
private	LinkedHashMultimap(Map<K,Traversable<V>> back, Multimap.ContainerType containerType, AbstractMultimap.SerializableSupplier<Traversable<?>> emptyContainer)

Method Summary

Modifier and Type	Method	Description
protected <K2, V2> LinkedHashMultimap<K2,V2>	createFromMap(@NonNull Map<K2,Traversable<V2>> back)	Creates a new Multimap instance from the given backing map.
protected <K2, V2> LinkedHashMultimap<K2,V2>	emptyInstance()	Returns an empty Multimap instance specific to the implementing class.
protected <K2, V2> Map<K2,V2>	emptyMapSupplier()	Returns an empty Map instance specific to the implementing class.
boolean	isSequential()	Indicates whether the elements of this Traversable appear in encounter (insertion) order.
static <K, V> LinkedHashMultimap<K,V>	narrow(LinkedHashMultimap<? extends K,? extends V> map)	Narrows a LinkedHashMultimap<? extends K, ? extends V> to LinkedHashMultimap<K, V> via a type-safe cast.
static <V> LinkedHashMultimap.Builder<V>	withSeq()	Returns a builder for LinkedHashMultimap instances where values are stored in a sequence.
static <V> LinkedHashMultimap.Builder<V>	withSet()	Returns a builder for LinkedHashMultimap instances where values are stored in a set.
static <V extends Comparable<?>> LinkedHashMultimap.Builder<V>	withSortedSet()	Returns a builder for LinkedHashMultimap instances where values are stored in a sorted set.
static <V> LinkedHashMultimap.Builder<V>	withSortedSet(@NonNull Comparator<? super V> comparator)	Returns a builder for LinkedHashMultimap instances where values are stored in a sorted set with a custom comparator.

Methods inherited from class io.vavr.collection.AbstractMultimap

asMap, bimap, containsKey, distinct, distinctBy, distinctBy, drop, dropRight, dropUntil, dropWhile, equals, filter, filter, filterKeys, filterValues, flatMap, get, getContainerType, getOrElse, groupBy, grouped, hashCode, head, init, initOption, isAsync, isEmpty, isLazy, iterator, keySet, last, map, mapValues, merge, merge, orElse, orElse, partition, peek, put, put, reject, reject, rejectKeys, rejectValues, remove, remove, removeAll, removeAll, removeKeys, removeValues, replace, replace, replaceAll, replaceAll, replaceValue, retainAll, scan, size, slideBy, sliding, sliding, span, stringPrefix, tail, tailOption, take, takeRight, takeUntil, takeWhile, toJavaMap, toJavaMap, toString, values

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface io.vavr.collection.Foldable

fold, reduce, reduceOption

Methods inherited from interface io.vavr.Function1

andThen, arity, compose, compose1, curried, isMemoized, memoized, partial, reversed, tupled

Methods inherited from interface io.vavr.collection.Multimap

apply, asPartialFunction, collect, contains, containsValue, flatMap, foldRight, forEach, hasDefiniteSize, isDefinedAt, isDistinct, isTraversableAgain, iterator, length, map, mapTo, mapToVoid, scanLeft, scanRight, transform, unzip, unzip, unzip3, unzip3, zip, zipAll, zipWith, zipWithIndex, zipWithIndex

Methods inherited from interface io.vavr.PartialFunction

lift

Methods inherited from interface io.vavr.collection.Traversable

arrangeBy, average, containsAll, count, existsUnique, find, findLast, foldLeft, forEachWithIndex, get, headOption, isOrdered, isSingleValued, lastOption, max, maxBy, maxBy, min, minBy, minBy, mkCharSeq, mkCharSeq, mkCharSeq, mkString, mkString, mkString, nonEmpty, product, reduceLeft, reduceLeftOption, reduceRight, reduceRightOption, single, singleOption, spliterator, sum

Methods inherited from interface io.vavr.Value

collect, collect, corresponds, eq, exists, forAll, forEach, getOrElse, getOrElse, getOrElseThrow, getOrElseTry, getOrNull, out, out, stderr, stdout, toArray, toCharSeq, toCompletableFuture, toEither, toEither, toInvalid, toInvalid, toJavaArray, toJavaArray, toJavaArray, toJavaCollection, toJavaList, toJavaList, toJavaMap, toJavaMap, toJavaMap, toJavaOptional, toJavaParallelStream, toJavaSet, toJavaSet, toJavaStream, toLeft, toLeft, toLinkedMap, toLinkedMap, toLinkedSet, toList, toMap, toMap, toOption, toPriorityQueue, toPriorityQueue, toQueue, toRight, toRight, toSet, toSortedMap, toSortedMap, toSortedMap, toSortedMap, toSortedSet, toSortedSet, toStream, toTree, toTree, toTry, toTry, toValid, toValid, toValidation, toValidation, toVector

Field Details

serialVersionUID

private static final long serialVersionUID

See Also:

• Constant Field Values

Constructor Details

LinkedHashMultimap

private LinkedHashMultimap(Map<K,Traversable<V>> back,
 Multimap.ContainerType containerType,
 AbstractMultimap.SerializableSupplier<Traversable<?>> emptyContainer)

Method Details

withSeq

public static <V> LinkedHashMultimap.Builder<V> withSeq()

Returns a builder for LinkedHashMultimap instances where values are stored in a sequence. Values for each key will be stored in a Vavr List, allowing duplicates and preserving insertion order.

Type Parameters:

V - The value type

Returns:

A new Builder for creating LinkedHashMultimap instances with sequence-based value storage

withSet

public static <V> LinkedHashMultimap.Builder<V> withSet()

Returns a builder for LinkedHashMultimap instances where values are stored in a set. Values for each key will be stored in a Vavr HashSet, eliminating duplicates.

Type Parameters:

V - The value type

Returns:

A new Builder for creating LinkedHashMultimap instances with set-based value storage

withSortedSet

public static <V extends Comparable<?>>
LinkedHashMultimap.Builder<V> withSortedSet()

Returns a builder for LinkedHashMultimap instances where values are stored in a sorted set. Values for each key will be stored in a Vavr TreeSet, eliminating duplicates and maintaining natural ordering.

Type Parameters:

V - The value type, must be Comparable

Returns:

A new Builder for creating LinkedHashMultimap instances with sorted set-based value storage

withSortedSet

public static <V> LinkedHashMultimap.Builder<V> withSortedSet(@NonNull Comparator<? super V> comparator)

Returns a builder for LinkedHashMultimap instances where values are stored in a sorted set with a custom comparator. Values for each key will be stored in a Vavr TreeSet, eliminating duplicates and maintaining order defined by the comparator.

Type Parameters:

V - The value type

Parameters:

comparator - The comparator to define the ordering of values

Returns:

A new Builder for creating LinkedHashMultimap instances with sorted set-based value storage using the given comparator

Throws:

NullPointerException - if comparator is null

narrow

public static <K,
V> LinkedHashMultimap<K,V> narrow(LinkedHashMultimap<? extends K,? extends V> map)

Narrows a LinkedHashMultimap<? extends K, ? extends V> to LinkedHashMultimap<K, V> via a type-safe cast. Safe here because the multimap is immutable and no elements can be added that would violate the type (covariance)

Type Parameters:

K - the target key type

V - the target value type

Parameters:

map - the multimap to narrow

Returns:

the same multimap viewed as LinkedHashMultimap<K, V>

emptyMapSupplier

protected <K2,
V2> Map<K2,V2> emptyMapSupplier()

Description copied from class: AbstractMultimap

Returns an empty Map instance specific to the implementing class.

Specified by:

emptyMapSupplier in class AbstractMultimap<K,V,LinkedHashMultimap<K,V>>

Type Parameters:

K2 - Key type of the empty map

V2 - Value type of the empty map

Returns:

An empty Map instance

emptyInstance

protected <K2,
V2> LinkedHashMultimap<K2,V2> emptyInstance()

Description copied from class: AbstractMultimap

Returns an empty Multimap instance specific to the implementing class.

Specified by:

emptyInstance in class AbstractMultimap<K,V,LinkedHashMultimap<K,V>>

Type Parameters:

K2 - Key type of the empty multimap

V2 - Value type of the empty multimap

Returns:

An empty Multimap instance

createFromMap

protected <K2,
V2> LinkedHashMultimap<K2,V2> createFromMap(@NonNull Map<K2,Traversable<V2>> back)

Description copied from class: AbstractMultimap

Creates a new Multimap instance from the given backing map.

Specified by:

createFromMap in class AbstractMultimap<K,V,LinkedHashMultimap<K,V>>

Type Parameters:

K2 - Key type of the new multimap

V2 - Value type of the new multimap

Parameters:

back - The backing map to create the multimap from

Returns:

A new Multimap instance containing the entries from the backing map

isSequential

public boolean isSequential()

Description copied from interface: Traversable

Indicates whether the elements of this Traversable appear in encounter (insertion) order.

Specified by:

isSequential in interface Traversable<K>

Returns:

true if insertion order is preserved, false otherwise