Package com.nimbusds.oauth2.sdk.util

Class MultivaluedMapUtils

java.lang.Object

com.nimbusds.oauth2.sdk.util.MultivaluedMapUtils

public final class MultivaluedMapUtils
extends Object

Multi-valued map utilities.

Method Summary

Modifier and Type	Method	Description
static <K,V> V	getFirstValue(Map<K,List<V>> map, K key)	Gets the first value for the specified key.
static <K,V> Set<K>	getKeysWithMoreThanOneValue(Map<K,List<V>> map, Set<K> excepted)	Returns the keys with more than one value.
static <K,V> V	removeAndReturnFirstValue(Map<K,List<V>> map, String key)	Removes the entry for the specified key and returns its first value.
static <K,V> Map<K,V>	toSingleValuedMap(Map<K,List<V>> map)	Converts the specified multi-valued map to a single-valued map by taking the first value in the list.

Methods inherited from class java.lang.Object

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

Method Detail

toSingleValuedMap

public static <K,V> Map<K,V> toSingleValuedMap(Map<K,List<V>> map)

Converts the specified multi-valued map to a single-valued map by taking the first value in the list.

Parameters:

map - The multi-valued map, null if not specified.

Returns:

The single-valued map, null if no map was specified.

getFirstValue

public static <K,V> V getFirstValue(Map<K,List<V>> map,
                                          K key)

Gets the first value for the specified key.

Parameters:

map - The multi-valued map. Must not be null.

key - The key. Must not be null.

Returns:

The first value, null if not set.

removeAndReturnFirstValue

public static <K,V> V removeAndReturnFirstValue(Map<K,List<V>> map,
                                                      String key)

Removes the entry for the specified key and returns its first value.

Parameters:

map - The multi-valued map. Must not be null.

key - The key. Must not be null.

Returns:

The first value, null if not set.

getKeysWithMoreThanOneValue

public static <K,V> Set<K> getKeysWithMoreThanOneValue(Map<K,List<V>> map,
                                                             Set<K> excepted)

Returns the keys with more than one value.

Parameters:

map - The multi-valued map, null if not specified.

excepted - The excepted keys, null or empty if none.

Returns:

The keys with more than one value, empty set if none.