Package org.springframework.util

Class LinkedMultiValueMap<K,V>

java.lang.Object

org.springframework.util.MultiValueMapAdapter<K,V>

org.springframework.util.LinkedMultiValueMap<K,V>

Type Parameters:

K - the key type

V - the value element type

All Implemented Interfaces:

Serializable, Cloneable, Map<K,List<V>>, MultiValueMap<K,V>

public class LinkedMultiValueMap<K,V>
extends MultiValueMapAdapter<K,V>
implements Serializable, Cloneable

Simple implementation of MultiValueMap that wraps a LinkedHashMap, storing multiple values in an ArrayList.

This Map implementation is generally not thread-safe. It is primarily designed for data structures exposed from request objects, for use in a single thread only.

Since:

3.0

Author:

Arjen Poutsma, Juergen Hoeller

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from interface java.util.Map

Map.Entry<K extends Object,V extends Object>

Constructor Summary

Constructors

Constructor	Description
LinkedMultiValueMap()	Create a new LinkedMultiValueMap that wraps a LinkedHashMap.
LinkedMultiValueMap(int expectedSize)	Create a new LinkedMultiValueMap that wraps a LinkedHashMap with an initial capacity that can accommodate the specified number of elements without any immediate resize/rehash operations to be expected.
LinkedMultiValueMap(Map<K,List<V>> otherMap)	Copy constructor: Create a new LinkedMultiValueMap with the same mappings as the specified Map.

Method Summary

Modifier and Type	Method	Description
LinkedMultiValueMap<K,V>	clone()	Create a regular copy of this Map.
LinkedMultiValueMap<K,V>	deepCopy()	Create a deep copy of this Map.

Methods inherited from class org.springframework.util.MultiValueMapAdapter

add, addAll, addAll, clear, containsKey, containsValue, entrySet, equals, forEach, get, getFirst, hashCode, isEmpty, keySet, put, putAll, putIfAbsent, remove, set, setAll, size, toSingleValueMap, toString, values

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, getOrDefault, merge, remove, replace, replace, replaceAll

Methods inherited from interface org.springframework.util.MultiValueMap

addIfAbsent

Constructor Details

LinkedMultiValueMap

public LinkedMultiValueMap()

Create a new LinkedMultiValueMap that wraps a LinkedHashMap.

LinkedMultiValueMap

public LinkedMultiValueMap(int expectedSize)

Create a new LinkedMultiValueMap that wraps a LinkedHashMap with an initial capacity that can accommodate the specified number of elements without any immediate resize/rehash operations to be expected.

Parameters:

expectedSize - the expected number of elements (with a corresponding capacity to be derived so that no resize/rehash operations are needed)

See Also:

• CollectionUtils.newLinkedHashMap(int)

LinkedMultiValueMap

public LinkedMultiValueMap(Map<K,List<V>> otherMap)

Copy constructor: Create a new LinkedMultiValueMap with the same mappings as the specified Map. Note that this will be a shallow copy; its value-holding List entries will get reused and therefore cannot get modified independently.

Parameters:

otherMap - the Map whose mappings are to be placed in this Map

See Also:

• clone()
• deepCopy()

Method Details

deepCopy

public LinkedMultiValueMap<K,V> deepCopy()

Create a deep copy of this Map.

Returns:

a copy of this Map, including a copy of each value-holding List entry (consistently using an independent modifiable ArrayList for each entry) along the lines of MultiValueMap.addAll semantics

Since:

4.2

See Also:

• MultiValueMapAdapter.addAll(MultiValueMap)
• clone()

clone

public LinkedMultiValueMap<K,V> clone()

Create a regular copy of this Map.

Overrides:

clone in class Object

Returns:

a shallow copy of this Map, reusing this Map's value-holding List entries (even if some entries are shared or unmodifiable) along the lines of standard Map.put semantics

Since:

4.2

See Also:

• MultiValueMapAdapter.put(Object, List)
• MultiValueMapAdapter.putAll(Map)
• LinkedMultiValueMap(Map)
• deepCopy()