Package org.elasticsearch.common.collect

Class HppcMaps

java.lang.Object

org.elasticsearch.common.collect.HppcMaps

public final class HppcMaps
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	HppcMaps.Object

Method Summary

Modifier and Type	Method	Description
static <K,V> ObjectObjectHashMap<K,V>	ensureNoNullKeys(int expectedElements)	Wraps the given map and prevent adding of null keys.
static <T> Iterable<T>	intersection(ObjectLookupContainer<T> container1, ObjectLookupContainer<T> container2)
static <K,V> ObjectObjectHashMap<K,V>	newMap()	Returns a new map with a default initial capacity.
static <K,V> ObjectObjectHashMap<K,V>	newMap(int expectedElements)	Returns a new map with the given number of expected elements.
static <K,V> ObjectObjectHashMap<K,V>	newNoNullKeysMap()	Returns a map like newMap() that does not accept null keys
static <K,V> ObjectObjectHashMap<K,V>	newNoNullKeysMap(int expectedElements)	Returns a map like newMap(int) that does not accept null keys

Methods inherited from class java.lang.Object

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

Method Detail

newMap

public static <K,V> ObjectObjectHashMap<K,V> newMap(int expectedElements)

Returns a new map with the given number of expected elements.

Parameters:

expectedElements - The expected number of elements guaranteed not to cause buffer expansion (inclusive).

newMap

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

Returns a new map with a default initial capacity.

newNoNullKeysMap

public static <K,V> ObjectObjectHashMap<K,V> newNoNullKeysMap()

Returns a map like newMap() that does not accept null keys

newNoNullKeysMap

public static <K,V> ObjectObjectHashMap<K,V> newNoNullKeysMap(int expectedElements)

Returns a map like newMap(int) that does not accept null keys

Parameters:

expectedElements - The expected number of elements guaranteed not to cause buffer expansion (inclusive).

ensureNoNullKeys

public static <K,V> ObjectObjectHashMap<K,V> ensureNoNullKeys(int expectedElements)

Wraps the given map and prevent adding of null keys.

Parameters:

expectedElements - The expected number of elements guaranteed not to cause buffer expansion (inclusive).

intersection

public static <T> Iterable<T> intersection(ObjectLookupContainer<T> container1,
                                           ObjectLookupContainer<T> container2)

Returns:

an intersection view over the two specified containers (which can be KeyContainer or ObjectHashSet).