org.assertj.core.util
Class Iterables

java.lang.Object
  org.assertj.core.util.Iterables

public final class Iterables
extends Object

Utility methods related to Iterables.

Author:

Yvonne Wang, Alex Ruiz, Joel Costigliola

Method Summary

static boolean	isNullOrEmpty(Iterable<?> iterable) Indicates whether the given Iterable is null or empty.
static <T> List<T>	nonNullElementsIn(Iterable<? extends T> i) Returns all the non-null elements in the given Iterable.
static int	sizeOf(Iterable<?> iterable) Returns the size of the given Iterable.
static <T> T[]	toArray(Iterable<? extends T> iterable) Create an array from an Iterable.

Methods inherited from class java.lang.Object

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

Method Detail

isNullOrEmpty

public static boolean isNullOrEmpty(Iterable<?> iterable)

Indicates whether the given Iterable is null or empty.

Parameters:

iterable - the given Iterable to check.

Returns:

true if the given Iterable is null or empty, otherwise false.

sizeOf

public static int sizeOf(Iterable<?> iterable)

Returns the size of the given Iterable.

Parameters:

iterable - the Iterable to get size.

Returns:

the size of the given Iterable.

Throws:

NullPointerException - if given Iterable is null.

nonNullElementsIn

public static <T> List<T> nonNullElementsIn(Iterable<? extends T> i)

Returns all the non-null elements in the given Iterable.

Type Parameters:

T - the type of elements of the Iterable.

Parameters:

i - the given Iterable.

Returns:

all the non-null elements in the given Iterable. An empty list is returned if the given Iterable is null.

Since:

1.1.3

toArray

public static <T> T[] toArray(Iterable<? extends T> iterable)

Create an array from an Iterable.

Type Parameters:

T - the type of elements of the Iterable.

Parameters:

iterable - an Iterable to translate in an array.

Returns:

all the elements from the given Iterable in an array. null if given Iterable is null.