com.hpe.caf.worker.document.util

Class ListFunctions

java.lang.Object

com.hpe.caf.worker.document.util.ListFunctions

public final class ListFunctions
extends Object

Utility functions related to list collections.

Method Summary

Modifier and Type	Method and Description
static <T> ArrayList<T>	copy(List<T> list, int extraCapacity) Returns a copy of the specified list and leaves the specified extra capacity.
static <T> List<T>	emptyToNull(List<T> list) Returns the specified list if is contains any elements, or null if the list is empty.
static <T> boolean	isNullOrEmpty(List<T> list) Returns true if the specified list is null or contains no elements.

Methods inherited from class java.lang.Object

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

Method Detail

copy

@Nonnull
public static <T> ArrayList<T> copy(List<T> list,
                                             int extraCapacity)

Returns a copy of the specified list and leaves the specified extra capacity.

Type Parameters:

T - the type of elements

Parameters:

list - the list to be copied

extraCapacity - the amount of space capacity required

Returns:

a copy of the specified list with the required extra capacity

emptyToNull

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

Returns the specified list if is contains any elements, or null if the list is empty.

Type Parameters:

T - the type of elements

Parameters:

list - the list to be checked

Returns:

the specified list or null if it is empty

isNullOrEmpty

public static <T> boolean isNullOrEmpty(List<T> list)

Returns true if the specified list is null or contains no elements.

Type Parameters:

T - the type of elements

Parameters:

list - the list to be checked

Returns:

true if the list if null or contains no elements