Package au.csiro.pathling.utilities

Class Lists

java.lang.Object

au.csiro.pathling.utilities.Lists

public abstract class Lists
extends Object

Utility class containing some List helper functions.

Author:

Piotr Szul

Constructor Summary

Constructors

Constructor	Description
Lists()

Method Summary

Modifier and Type	Method	Description
static <T> List<T>	normalizeEmpty(List<T> list)	Returns an empty list if the input list is empty; otherwise, returns the input list.
static List<String>	normalizeEmpty(Optional<List<String>> maybeList)	Returns an empty list if the input list is not present; otherwise, returns the input list.

Methods inherited from class java.lang.Object

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

Constructor Details

Lists

public Lists()

Method Details

normalizeEmpty

@Nonnull
public static <T> List<T> normalizeEmpty(@Nonnull
 List<T> list)

Returns an empty list if the input list is empty; otherwise, returns the input list.

Type Parameters:

T - the type of elements in the list

Parameters:

list - the list to normalize

Returns:

an empty list if the input list is empty; otherwise, the input list

normalizeEmpty

@Nonnull
public static List<String> normalizeEmpty(@Nonnull
 Optional<List<String>> maybeList)

Returns an empty list if the input list is not present; otherwise, returns the input list.

Parameters:

maybeList - the list to normalize

Returns:

an empty list if the input list is not present; otherwise, the input list