com.hazelcast.util

Class MapUtil

java.lang.Object

com.hazelcast.util.MapUtil

public final class MapUtil
extends Object

Utility class for Maps

Method Summary

Modifier and Type	Method and Description
static <K,V> ConcurrentMap<K,V>	createConcurrentHashMap(int expectedMapSize) Utility method that creates an LinkedHashMap with its initialCapacity calculated to minimize rehash operations
static <K,V> Map<K,V>	createHashMap(int expectedMapSize) Utility method that creates an HashMap with its initialCapacity calculated to minimize rehash operations
static <K,V> Map<K,V>	createHashMapAdapter(int expectedMapSize) Utility method that creates an HashMapAdapter with its initialCapacity calculated to minimize rehash operations
static <V> Int2ObjectHashMap<V>	createInt2ObjectHashMap(int expectedMapSize) Utility method that creates an Int2ObjectHashMap with its initialCapacity calculated to minimize rehash operations
static <K,V> Map<K,V>	createLinkedHashMap(int expectedMapSize) Utility method that creates an LinkedHashMap with its initialCapacity calculated to minimize rehash operations
static boolean	isNullOrEmpty(Map map) Test the given map and return true if the map is null or empty.

Methods inherited from class java.lang.Object

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

Method Detail

createHashMap

public static <K,V> Map<K,V> createHashMap(int expectedMapSize)

Utility method that creates an HashMap with its initialCapacity calculated to minimize rehash operations

createHashMapAdapter

public static <K,V> Map<K,V> createHashMapAdapter(int expectedMapSize)

Utility method that creates an HashMapAdapter with its initialCapacity calculated to minimize rehash operations

createLinkedHashMap

public static <K,V> Map<K,V> createLinkedHashMap(int expectedMapSize)

Utility method that creates an LinkedHashMap with its initialCapacity calculated to minimize rehash operations

createConcurrentHashMap

public static <K,V> ConcurrentMap<K,V> createConcurrentHashMap(int expectedMapSize)

Utility method that creates an LinkedHashMap with its initialCapacity calculated to minimize rehash operations

createInt2ObjectHashMap

public static <V> Int2ObjectHashMap<V> createInt2ObjectHashMap(int expectedMapSize)

Utility method that creates an Int2ObjectHashMap with its initialCapacity calculated to minimize rehash operations

isNullOrEmpty

public static boolean isNullOrEmpty(Map map)

Test the given map and return true if the map is null or empty.

Parameters:

map - the map to test

Returns:

true if map is null or empty, otherwise false.