org.springframework.util

Class LinkedMultiValueMap<K,V>

java.lang.Object

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

All Implemented Interfaces:

java.io.Serializable, java.util.Map<K,java.util.List<V>>, MultiValueMap<K,V>

public class LinkedMultiValueMap<K,V>
extends java.lang.Object
implements MultiValueMap<K,V>, java.io.Serializable

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

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

java.util.Map.Entry<K,V>

Field Summary

Fields

Modifier and Type	Field and Description
private static long	serialVersionUID
private java.util.Map<K,java.util.List<V>>	targetMap

Constructor Summary

Constructors

Constructor and Description
LinkedMultiValueMap() Create a new LinkedMultiValueMap that wraps a LinkedHashMap.
LinkedMultiValueMap(int initialCapacity) Create a new LinkedMultiValueMap that wraps a LinkedHashMap with the given initial capacity.
LinkedMultiValueMap(java.util.Map<K,java.util.List<V>> otherMap) Copy constructor: Create a new LinkedMultiValueMap with the same mappings as the specified Map.

Method Summary

Methods

Modifier and Type	Method and Description
void	add(K key, V value) Add the given single value to the current list of values for the given key.
void	clear()
boolean	containsKey(java.lang.Object key)
boolean	containsValue(java.lang.Object value)
java.util.Set<java.util.Map.Entry<K,java.util.List<V>>>	entrySet()
boolean	equals(java.lang.Object obj)
java.util.List<V>	get(java.lang.Object key)
V	getFirst(K key) Return the first value for the given key.
int	hashCode()
boolean	isEmpty()
java.util.Set<K>	keySet()
java.util.List<V>	put(K key, java.util.List<V> value)
void	putAll(java.util.Map<? extends K,? extends java.util.List<V>> m)
java.util.List<V>	remove(java.lang.Object key)
void	set(K key, V value) Set the given single value under the given key.
void	setAll(java.util.Map<K,V> values) Set the given values under.
int	size()
java.util.Map<K,V>	toSingleValueMap() Returns the first values contained in this MultiValueMap.
java.lang.String	toString()
java.util.Collection<java.util.List<V>>	values()

Methods inherited from class java.lang.Object

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

Field Detail

serialVersionUID

private static final long serialVersionUID

See Also:

Constant Field Values

targetMap

private final java.util.Map<K,java.util.List<V>> targetMap

Constructor Detail

LinkedMultiValueMap

public LinkedMultiValueMap()

Create a new LinkedMultiValueMap that wraps a LinkedHashMap.

LinkedMultiValueMap

public LinkedMultiValueMap(int initialCapacity)

Create a new LinkedMultiValueMap that wraps a LinkedHashMap with the given initial capacity.

Parameters:

initialCapacity - the initial capacity

LinkedMultiValueMap

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

Copy constructor: Create a new LinkedMultiValueMap with the same mappings as the specified Map.

Parameters:

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

Method Detail

add

public void add(K key,
       V value)

Description copied from interface: MultiValueMap

Add the given single value to the current list of values for the given key.

Specified by:

add in interface MultiValueMap<K,V>

Parameters:

key - the key

value - the value to be added

getFirst

public V getFirst(K key)

Description copied from interface: MultiValueMap

Return the first value for the given key.

Specified by:

getFirst in interface MultiValueMap<K,V>

Parameters:

key - the key

Returns:

the first value for the specified key, or null

set

public void set(K key,
       V value)

Description copied from interface: MultiValueMap

Set the given single value under the given key.

Specified by:

set in interface MultiValueMap<K,V>

Parameters:

key - the key

value - the value to set

setAll

public void setAll(java.util.Map<K,V> values)

Description copied from interface: MultiValueMap

Set the given values under.

Specified by:

setAll in interface MultiValueMap<K,V>

Parameters:

values - the values.

toSingleValueMap

public java.util.Map<K,V> toSingleValueMap()

Description copied from interface: MultiValueMap

Returns the first values contained in this MultiValueMap.

Specified by:

toSingleValueMap in interface MultiValueMap<K,V>

Returns:

a single value representation of this map

size

public int size()

Specified by:

size in interface java.util.Map<K,java.util.List<V>>

isEmpty

public boolean isEmpty()

Specified by:

isEmpty in interface java.util.Map<K,java.util.List<V>>

containsKey

public boolean containsKey(java.lang.Object key)

Specified by:

containsKey in interface java.util.Map<K,java.util.List<V>>

containsValue

public boolean containsValue(java.lang.Object value)

Specified by:

containsValue in interface java.util.Map<K,java.util.List<V>>

get

public java.util.List<V> get(java.lang.Object key)

Specified by:

get in interface java.util.Map<K,java.util.List<V>>

put

public java.util.List<V> put(K key,
                    java.util.List<V> value)

Specified by:

put in interface java.util.Map<K,java.util.List<V>>

remove

public java.util.List<V> remove(java.lang.Object key)

Specified by:

remove in interface java.util.Map<K,java.util.List<V>>

putAll

public void putAll(java.util.Map<? extends K,? extends java.util.List<V>> m)

Specified by:

putAll in interface java.util.Map<K,java.util.List<V>>

clear

public void clear()

Specified by:

clear in interface java.util.Map<K,java.util.List<V>>

keySet

public java.util.Set<K> keySet()

Specified by:

keySet in interface java.util.Map<K,java.util.List<V>>

values

public java.util.Collection<java.util.List<V>> values()

Specified by:

values in interface java.util.Map<K,java.util.List<V>>

entrySet

public java.util.Set<java.util.Map.Entry<K,java.util.List<V>>> entrySet()

Specified by:

entrySet in interface java.util.Map<K,java.util.List<V>>

equals

public boolean equals(java.lang.Object obj)

Specified by:

equals in interface java.util.Map<K,java.util.List<V>>

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Specified by:

hashCode in interface java.util.Map<K,java.util.List<V>>

Overrides:

hashCode in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object