Package org.hibernate.models.internal.util

Class CollectionHelper

java.lang.Object

org.hibernate.models.internal.util.CollectionHelper

public class CollectionHelper
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static final int	DEFAULT_LIST_CAPACITY
static final float	LOAD_FACTOR
static final int	MINIMUM_INITIAL_CAPACITY

Constructor Summary

Constructors

Constructor	Description
CollectionHelper()

Method Summary

Modifier and Type	Method	Description
static <T> ArrayList<T>	arrayList(int expectedNumberOfElements)
static int	determineProperSizing(int numberOfElements)	Determine the proper initial size for a new collection in order for it to hold the given a number of elements.
static <T> void	forEach(T[] values, Consumer<T> consumer)
static boolean	isEmpty(Object[] objects)
static boolean	isEmpty(Collection collection)
static boolean	isEmpty(Map map)
static boolean	isNotEmpty(Object[] objects)
static boolean	isNotEmpty(Collection collection)
static boolean	isNotEmpty(Map map)
static <E> List<E>	join(List<E> first, List<E> second)
static int	length(Object[] array)
static <K, V> LinkedHashMap<K,V>	linkedMapOfSize(int size)	Build a properly sized linked map, especially handling load size and load factor to prevent immediate resizing.
static int	size(Collection collection)
static int	size(Map map)

Methods inherited from class java.lang.Object

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

Field Details

DEFAULT_LIST_CAPACITY

public static final int DEFAULT_LIST_CAPACITY

See Also:

• Constant Field Values

MINIMUM_INITIAL_CAPACITY

public static final int MINIMUM_INITIAL_CAPACITY

See Also:

• Constant Field Values

LOAD_FACTOR

public static final float LOAD_FACTOR

See Also:

• Constant Field Values

Constructor Details

CollectionHelper

public CollectionHelper()

Method Details

isEmpty

public static boolean isEmpty(Collection collection)

isNotEmpty

public static boolean isNotEmpty(Collection collection)

isEmpty

public static boolean isEmpty(Map map)

isNotEmpty

public static boolean isNotEmpty(Map map)

isEmpty

public static boolean isEmpty(Object[] objects)

isNotEmpty

public static boolean isNotEmpty(Object[] objects)

size

public static int size(Collection collection)

size

public static int size(Map map)

length

public static int length(Object[] array)

arrayList

public static <T> ArrayList<T> arrayList(int expectedNumberOfElements)

join

public static <E> List<E> join(List<E> first,
 List<E> second)

forEach

public static <T> void forEach(T[] values,
 Consumer<T> consumer)

determineProperSizing

public static int determineProperSizing(int numberOfElements)

Determine the proper initial size for a new collection in order for it to hold the given a number of elements. Specifically we want to account for load size and load factor to prevent immediate resizing.

Parameters:

numberOfElements - The number of elements to be stored.

Returns:

The proper size.

linkedMapOfSize

public static <K,
V> LinkedHashMap<K,V> linkedMapOfSize(int size)

Build a properly sized linked map, especially handling load size and load factor to prevent immediate resizing.

Especially helpful for copy map contents.

Parameters:

size - The size to make the map.

Returns:

The sized linked map.