org.hibernate.validator.internal.util

Class CollectionHelper

java.lang.Object

org.hibernate.validator.internal.util.CollectionHelper

public final class CollectionHelper
extends Object

Provides some methods for simplified collection instantiation.

Author:

Gunnar Morling, Kevin Pollet <kevin.pollet@serli.com> (C) 2011 SERLI, Hardy Ferentschik

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	CollectionHelper.Partitioner<K,V>

Method Summary

Modifier and Type	Method and Description
static <T> Set<T>	asSet(T... ts)
static <T> ArrayList<T>	newArrayList()
static <T> ArrayList<T>	newArrayList(int size)
static <T> ArrayList<T>	newArrayList(Iterable<T>... iterables)
static <K,V> ConcurrentHashMap<K,V>	newConcurrentHashMap()
static <K,V> HashMap<K,V>	newHashMap()
static <K,V> HashMap<K,V>	newHashMap(int size)
static <K,V> HashMap<K,V>	newHashMap(Map<K,V> map)
static <T> HashSet<T>	newHashSet()
static <T> HashSet<T>	newHashSet(Collection<? extends T> c)
static <T> HashSet<T>	newHashSet(Collection<? extends T> s1, Collection<? extends T> s2)
static <T> HashSet<T>	newHashSet(int size)
static <T> HashSet<T>	newHashSet(Iterable<? extends T> iterable)
static <K,V> Map<K,List<V>>	partition(List<V> list, CollectionHelper.Partitioner<K,V> partitioner) Creates a map containing the given list's values partitioned by the given partitioner.
static <K,V> Map<K,Set<V>>	partition(Set<V> set, CollectionHelper.Partitioner<K,V> partitioner) Creates a map containing the given set's values partitioned by the given partitioner.
static <T> List<T>	toImmutableList(List<T> list)
static <K,V> Map<K,V>	toImmutableMap(Map<K,V> map)
static <T> Set<T>	toImmutableSet(Set<T> set)

Methods inherited from class java.lang.Object

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

Method Detail

newHashMap

public static <K,V> HashMap<K,V> newHashMap()

newHashMap

public static <K,V> HashMap<K,V> newHashMap(int size)

newHashMap

public static <K,V> HashMap<K,V> newHashMap(Map<K,V> map)

newConcurrentHashMap

public static <K,V> ConcurrentHashMap<K,V> newConcurrentHashMap()

newHashSet

public static <T> HashSet<T> newHashSet()

newHashSet

public static <T> HashSet<T> newHashSet(int size)

newHashSet

public static <T> HashSet<T> newHashSet(Collection<? extends T> c)

newHashSet

public static <T> HashSet<T> newHashSet(Collection<? extends T> s1,
                                        Collection<? extends T> s2)

newHashSet

public static <T> HashSet<T> newHashSet(Iterable<? extends T> iterable)

newArrayList

public static <T> ArrayList<T> newArrayList()

newArrayList

public static <T> ArrayList<T> newArrayList(int size)

newArrayList

@SafeVarargs
public static <T> ArrayList<T> newArrayList(Iterable<T>... iterables)

asSet

@SafeVarargs
public static <T> Set<T> asSet(T... ts)

toImmutableList

public static <T> List<T> toImmutableList(List<T> list)

toImmutableSet

public static <T> Set<T> toImmutableSet(Set<T> set)

toImmutableMap

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

partition

public static <K,V> Map<K,List<V>> partition(List<V> list,
                                             CollectionHelper.Partitioner<K,V> partitioner)

Creates a map containing the given list's values partitioned by the given partitioner.

Type Parameters:

K - The key type of the resulting map.

V - The element type of the list to be partitioned.

Parameters:

list - The list to be partitioned.

partitioner - The partitioner to be used for determining the partitions.

Returns:

A map containing the given list's values partitioned by the given partitioner.

partition

public static <K,V> Map<K,Set<V>> partition(Set<V> set,
                                            CollectionHelper.Partitioner<K,V> partitioner)

Creates a map containing the given set's values partitioned by the given partitioner.

Type Parameters:

K - The key type of the resulting map.

V - The element type of the set to be partitioned.

Parameters:

set - The set to be partitioned.

partitioner - The partitioner to be used for determining the partitions.

Returns:

A map containing the given set's values partitioned by the given partitioner.