org.fest.util

Class Iterables

java.lang.Object

org.fest.util.Iterables

public final class Iterables
extends java.lang.Object

Utility methods related to Iterables.

Author:

Yvonne Wang, Alex Ruiz, Joel Costigliola

Method Summary

Methods

Modifier and Type	Method and Description
static boolean	isNullOrEmpty(java.lang.Iterable<?> iterable) Indicates whether the given Iterable is null or empty.
static <T> java.util.List<T>	nonNullElementsIn(java.lang.Iterable<T> i) Returns all the non-null elements in the given Iterable.
static int	sizeOf(java.lang.Iterable<?> iterable) Returns the size of the given 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(java.lang.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(java.lang.Iterable<?> iterable)

Returns the size of the given Iterable.

Parameters:

iterable - the Iterable to get size.

Returns:

the size of the given Iterable.

Throws:

java.lang.NullPointerException - if given Iterable is null.

nonNullElementsIn

public static <T> java.util.List<T> nonNullElementsIn(java.lang.Iterable<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