Package org.glassfish.admin.amx.util

Class MapUtil

java.lang.Object

org.glassfish.admin.amx.util.MapUtil

public final class MapUtil
extends Object

Method Summary

Modifier and Type	Method	Description
static Object[]	getKeyObjects(Map<?,?> m)
static String[]	getKeyStrings(Map<?,?> m)
static <K> Set<K>	getNullValueKeys(Map<K,?> map)	Gets all keys which map to a null value
static <K,V> V	getWithDefault(Map<K,V> m, K key, V defaultValue)
static boolean	isAllStrings(Map<?,?> map)
static boolean	mapsEqual(Map<?,?> map1, Map<?,?> map2)
static <K,V> Map<K,V>	newMap()	assignable to any map type, keeps things short on the rhs
static Map<String,String>	newMap(String... mappings)	Create a new Map and insert the specified mappings as found in 'mappings'.
static <V> Map<String,V>	newMap(String key, V value)	Create a new Map consisting of a single key/value pair.
static <K,V> Map<K,V>	newMap(Map<K,V> m1, Map<K,V> m2)	Create a new Map combined all entries of two other maps.
static <T> Map<T,T>	newMap(T... mappings)	Create a new Map and insert the specified mappings as found in 'mappings'.
static <K,V> Map<K,V>	newMapNoNullValues(Map<K,V> map)	Creates a new map with all the old key/value pairs unless the value was null
static <K> void	removeAll(Map<K,?> map, Set<K> keySet)	Removes all keys in a set from a map
static <T> void	removeAll(Map<T,?> map, T[] keys)	Remove all entries keyed by 'keys'
static <K,V> Map<K,V>	toMap(Object[] params, Class<K> keyClass, Class<V> valueClass)
static <K,V> Map<K,V>	toMap(Properties props, Class<K> kClass, Class<V> vClass)
static String	toString(Map<?,?> m)
static String	toString(Map<?,?> map, String separator)
static Map<String,String>	toStringStringMap(Map<?,?> map)	Convert an arbitrary Map to one whose keys and values are both of type String.

Methods inherited from class java.lang.Object

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

Method Detail

getWithDefault

public static <K,V> V getWithDefault(Map<K,V> m,
                                           K key,
                                           V defaultValue)

getKeyObjects

public static Object[] getKeyObjects(Map<?,?> m)

getKeyStrings

public static String[] getKeyStrings(Map<?,?> m)

newMap

public static <K,V> Map<K,V> newMap()

assignable to any map type, keeps things short on the rhs

newMap

public static <V> Map<String,V> newMap(String key,
                                             V value)

Create a new Map consisting of a single key/value pair.

newMap

public static <K,V> Map<K,V> newMap(Map<K,V> m1,
                                                Map<K,V> m2)

Create a new Map combined all entries of two other maps. If a key is is both maps then the value in map2 will be used.

toMap

public static <K,V> Map<K,V> toMap(Object[] params,
                                               Class<K> keyClass,
                                               Class<V> valueClass)

newMap

public static <T> Map<T,T> newMap(T... mappings)

Create a new Map and insert the specified mappings as found in 'mappings'. The even-numbered entries are the keys, and the odd-numbered entries are the values.

newMap

public static Map<String,String> newMap(String... mappings)

Create a new Map and insert the specified mappings as found in 'mappings'. The even-numbered entries are the keys, and the odd-numbered entries are the values.

removeAll

public static <T> void removeAll(Map<T,?> map,
                                 T[] keys)

Remove all entries keyed by 'keys'

mapsEqual

public static boolean mapsEqual(Map<?,?> map1,
                                Map<?,?> map2)

newMapNoNullValues

public static <K,V> Map<K,V> newMapNoNullValues(Map<K,V> map)

Creates a new map with all the old key/value pairs unless the value was null

Parameters:

map - the old map to convert

Returns:

a new map with no null values

toString

public static String toString(Map<?,?> m)

toString

public static String toString(Map<?,?> map,
                              String separator)

getNullValueKeys

public static <K> Set<K> getNullValueKeys(Map<K,?> map)

Gets all keys which map to a null value

toMap

public static <K,V> Map<K,V> toMap(Properties props,
                                               Class<K> kClass,
                                               Class<V> vClass)

removeAll

public static <K> void removeAll(Map<K,?> map,
                                 Set<K> keySet)

Removes all keys in a set from a map

Parameters:

map - the map to remove keys from

keySet - a set of keys to remove

isAllStrings

public static boolean isAllStrings(Map<?,?> map)

Returns:

true if non-null Map and all keys and values are of type java.lang.String

toStringStringMap

public static Map<String,String> toStringStringMap(Map<?,?> map)

Convert an arbitrary Map to one whose keys and values are both of type String.