Package org.eclipse.jetty.util

Class MultiMap<V>

java.lang.Object

java.util.AbstractMap<K,V>

java.util.HashMap<K,V>

java.util.LinkedHashMap<String,List<V>>

org.eclipse.jetty.util.MultiMap<V>

Type Parameters:

V - the entry type for multimap values

All Implemented Interfaces:

Serializable, Cloneable, Map<String,List<V>>

public class MultiMap<V>
extends LinkedHashMap<String,List<V>>

A multi valued Map.

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class java.util.AbstractMap

AbstractMap.SimpleEntry<K extends Object,V extends Object>, AbstractMap.SimpleImmutableEntry<K extends Object,V extends Object>

Constructor Summary

Constructors

Constructor	Description
MultiMap()
MultiMap(Map<String,List<V>> map)
MultiMap(MultiMap<V> map)

Method Summary

Modifier and Type	Method	Description
void	add(String name, V value)	Add value to multi valued entry.
boolean	addAllValues(MultiMap<V> map)	Merge values.
void	addValues(String name, List<V> values)	Add values to multi valued entry.
void	addValues(String name, V[] values)	Add values to multi valued entry.
boolean	containsSimpleValue(V value)	Test for a specific single value in the map.
String	getString(String name)	Get value as String.
V	getValue(String name)	Get the first value from a multiple value.
V	getValue(String name, int i)	Get a value from a multiple value.
List<V>	getValues(String name)	Get multiple values.
List<V>	put(String name, V value)	Put multi valued entry.
void	putAllValues(Map<String,V> input)	Shorthand version of putAll
List<V>	putValues(String name, List<V> values)	Put multi valued entry.
final List<V>	putValues(String name, V... values)	Put multi valued entry.
boolean	removeValue(String name, V value)	Remove value.
String	toString()
Map<String,String[]>	toStringArrayMap()

Methods inherited from class java.util.LinkedHashMap

clear, containsValue, entrySet, forEach, get, getOrDefault, keySet, removeEldestEntry, replaceAll, values

Methods inherited from class java.util.HashMap

clone, compute, computeIfAbsent, computeIfPresent, containsKey, isEmpty, merge, put, putAll, putIfAbsent, remove, remove, replace, replace, size

Methods inherited from class java.util.AbstractMap

equals, hashCode

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Map

compute, computeIfAbsent, computeIfPresent, containsKey, equals, hashCode, isEmpty, merge, put, putAll, putIfAbsent, remove, remove, replace, replace, size

Constructor Details

MultiMap

public MultiMap()

MultiMap

public MultiMap(Map<String,List<V>> map)

MultiMap

public MultiMap(MultiMap<V> map)

Method Details

getValues

public List<V> getValues(String name)

Get multiple values. Single valued entries are converted to singleton lists.

Parameters:

name - The entry key.

Returns:

Unmodifieable List of values.

getValue

public V getValue(String name)

Get the first value from a multiple value.

Parameters:

name - The entry key.

Returns:

a value from index 0.

getValue

public V getValue(String name,
 int i)

Get a value from a multiple value. If the value is not a multivalue, then index 0 retrieves the value or null.

Parameters:

name - The entry key.

i - Index of element to get.

Returns:

a value.

getString

public String getString(String name)

Get value as String. Single valued items are converted to a String with the toString() Object method. Multi valued entries are converted to a comma separated List. No quoting of commas within values is performed.

Parameters:

name - The entry key.

Returns:

String value.

put

public List<V> put(String name,
 V value)

Put multi valued entry.

Parameters:

name - The entry key.

value - The simple value

Returns:

The previous value or null.

putAllValues

public void putAllValues(Map<String,V> input)

Shorthand version of putAll

Parameters:

input - the input map

putValues

public List<V> putValues(String name,
 List<V> values)

Put multi valued entry.

Parameters:

name - The entry key.

values - The List of multiple values.

Returns:

The previous value or null.

putValues

@SafeVarargs
public final List<V> putValues(String name,
 V... values)

Put multi valued entry.

Parameters:

name - The entry key.

values - The array of multiple values.

Returns:

The previous value or null.

add

public void add(String name,
 V value)

Add value to multi valued entry. If the entry is single valued, it is converted to the first value of a multi valued entry.

Parameters:

name - The entry key.

value - The entry value.

addValues

public void addValues(String name,
 List<V> values)

Add values to multi valued entry. If the entry is single valued, it is converted to the first value of a multi valued entry.

Parameters:

name - The entry key.

values - The List of multiple values.

addValues

public void addValues(String name,
 V[] values)

Add values to multi valued entry. If the entry is single valued, it is converted to the first value of a multi valued entry.

Parameters:

name - The entry key.

values - The String array of multiple values.

addAllValues

public boolean addAllValues(MultiMap<V> map)

Merge values.

Parameters:

map - the map to overlay on top of this one, merging together values if needed.

Returns:

true if an existing key was merged with potentially new values, false if either no change was made, or there were only new keys.

removeValue

public boolean removeValue(String name,
 V value)

Remove value.

Parameters:

name - The entry key.

value - The entry value.

Returns:

true if it was removed.

containsSimpleValue

public boolean containsSimpleValue(V value)

Test for a specific single value in the map.

NOTE: This is a SLOW operation, and is actively discouraged.

Parameters:

value - the value to search for

Returns:

true if contains simple value

toString

public String toString()

Overrides:

toString in class AbstractMap<String,List<V>>

toStringArrayMap

public Map<String,String[]> toStringArrayMap()

Returns:

Map of String arrays